2945 lines
99 KiB
JavaScript
2945 lines
99 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var module$1 = require('module');
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var pathModule = require('path');
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var url = require('url');
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var loadNAPI = require('node-gyp-build-optional-packages');
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var events = require('events');
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var os$1 = require('os');
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var fs$1 = require('fs');
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var msgpackr = require('msgpackr');
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var weakLruCache = require('weak-lru-cache');
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var orderedBinary$1 = require('ordered-binary');
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function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }
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function _interopNamespace(e) {
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if (e && e.__esModule) return e;
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var n = Object.create(null);
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if (e) {
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Object.keys(e).forEach(function (k) {
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if (k !== 'default') {
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var d = Object.getOwnPropertyDescriptor(e, k);
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Object.defineProperty(n, k, d.get ? d : {
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enumerable: true,
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get: function () { return e[k]; }
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});
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}
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});
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}
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n["default"] = e;
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return Object.freeze(n);
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}
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var pathModule__default = /*#__PURE__*/_interopDefaultLegacy(pathModule);
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var loadNAPI__default = /*#__PURE__*/_interopDefaultLegacy(loadNAPI);
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var fs__default = /*#__PURE__*/_interopDefaultLegacy(fs$1);
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var orderedBinary__namespace = /*#__PURE__*/_interopNamespace(orderedBinary$1);
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let Env, Txn, Dbi, Compression, Cursor, getAddress, getBufferAddress; exports.clearKeptObjects = void 0; let globalBuffer, setGlobalBuffer, arch, fs, os, tmpdir, lmdbError, path, EventEmitter, orderedBinary, MsgpackrEncoder, WeakLRUCache, getByBinary, startRead, setReadCallback, write, position, iterate, prefetch, resetTxn, getCurrentValue, getStringByBinary, getSharedBuffer, compress;
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path = pathModule__default["default"];
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let dirName = pathModule.dirname(url.fileURLToPath((typeof document === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : (document.currentScript && document.currentScript.src || new URL('index.cjs', document.baseURI).href)))).replace(/dist$/, '');
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let nativeAddon = loadNAPI__default["default"](dirName);
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if (process.isBun && false) {
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const { linkSymbols, FFIType } = require('bun:ffi');
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let lmdbLib = linkSymbols({
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getByBinary: {
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args: [FFIType.f64, FFIType.u32],
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returns: FFIType.u32,
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ptr: nativeAddon.getByBinaryPtr
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},
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iterate: {
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args: [FFIType.f64],
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returns: FFIType.i32,
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ptr: nativeAddon.iteratePtr,
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},
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position: {
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args: [FFIType.f64, FFIType.u32, FFIType.u32, FFIType.u32, FFIType.f64],
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returns: FFIType.i32,
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ptr: nativeAddon.positionPtr,
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},
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write: {
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args: [FFIType.f64, FFIType.f64],
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returns: FFIType.i32,
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ptr: nativeAddon.writePtr,
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},
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resetTxn: {
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args: [FFIType.f64],
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returns: FFIType.void,
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ptr: nativeAddon.resetTxnPtr,
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}
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});
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for (let key in lmdbLib.symbols) {
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nativeAddon[key] = lmdbLib.symbols[key].native;
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}
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}
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setNativeFunctions(nativeAddon);
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function setNativeFunctions(externals) {
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Env = externals.Env;
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Txn = externals.Txn;
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Dbi = externals.Dbi;
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Compression = externals.Compression;
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getAddress = externals.getAddress;
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getBufferAddress = externals.getBufferAddress;
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externals.createBufferForAddress;
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exports.clearKeptObjects = externals.clearKeptObjects || function() {};
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getByBinary = externals.getByBinary;
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externals.detachBuffer;
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startRead = externals.startRead;
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setReadCallback = externals.setReadCallback;
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setGlobalBuffer = externals.setGlobalBuffer;
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globalBuffer = externals.globalBuffer;
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getSharedBuffer = externals.getSharedBuffer;
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prefetch = externals.prefetch;
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iterate = externals.iterate;
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position = externals.position;
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resetTxn = externals.resetTxn;
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getCurrentValue = externals.getCurrentValue;
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externals.getCurrentShared;
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getStringByBinary = externals.getStringByBinary;
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externals.getSharedByBinary;
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write = externals.write;
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compress = externals.compress;
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Cursor = externals.Cursor;
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lmdbError = externals.lmdbError;
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if (externals.tmpdir)
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tmpdir = externals.tmpdir;
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}
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function setExternals(externals) {
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arch = externals.arch;
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fs = externals.fs;
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EventEmitter = externals.EventEmitter;
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orderedBinary = externals.orderedBinary;
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MsgpackrEncoder = externals.MsgpackrEncoder;
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WeakLRUCache = externals.WeakLRUCache;
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tmpdir = externals.tmpdir;
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os = externals.os;
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externals.onExit;
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}
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function when(promise, callback, errback) {
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if (promise && promise.then) {
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return errback ?
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promise.then(callback, errback) :
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promise.then(callback);
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}
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return callback(promise);
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}
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var backpressureArray;
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const WAITING_OPERATION = 0x2000000;
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const BACKPRESSURE_THRESHOLD = 300000;
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const TXN_DELIMITER = 0x8000000;
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const TXN_COMMITTED = 0x10000000;
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const TXN_FLUSHED = 0x20000000;
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const TXN_FAILED = 0x40000000;
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const FAILED_CONDITION = 0x4000000;
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const REUSE_BUFFER_MODE$1 = 512;
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const RESET_BUFFER_MODE = 1024;
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const NO_RESOLVE = 16;
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const HAS_TXN = 8;
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const CONDITIONAL_VERSION_LESS_THAN = 0x800;
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const CONDITIONAL_ALLOW_NOTFOUND = 0x800;
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const SYNC_PROMISE_SUCCESS = Promise.resolve(true);
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const SYNC_PROMISE_FAIL = Promise.resolve(false);
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SYNC_PROMISE_SUCCESS.isSync = true;
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SYNC_PROMISE_FAIL.isSync = true;
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const PROMISE_SUCCESS = Promise.resolve(true);
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const ABORT = 4.452694326329068e-106; // random/unguessable numbers, which work across module/versions and native
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const IF_EXISTS$1 = 3.542694326329068e-103;
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const CALLBACK_THREW = {};
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const LocalSharedArrayBuffer = typeof Deno != 'undefined' ? ArrayBuffer : SharedArrayBuffer; // Deno can't handle SharedArrayBuffer as an FFI argument due to https://github.com/denoland/deno/issues/12678
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const ByteArray = typeof Buffer != 'undefined' ? function(buffer) { return Buffer.from(buffer) } : Uint8Array;
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const queueTask = typeof setImmediate != 'undefined' ? setImmediate : setTimeout; // TODO: Or queueMicrotask?
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//let debugLog = []
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const WRITE_BUFFER_SIZE = 0x10000;
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function addWriteMethods(LMDBStore, { env, fixedBuffer, resetReadTxn, useWritemap, maxKeySize,
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eventTurnBatching, txnStartThreshold, batchStartThreshold, overlappingSync, commitDelay, separateFlushed, maxFlushDelay }) {
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// stands for write instructions
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var dynamicBytes;
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function allocateInstructionBuffer(lastPosition) {
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// Must use a shared buffer on older node in order to use Atomics, and it is also more correct since we are
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// indeed accessing and modifying it from another thread (in C). However, Deno can't handle it for
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// FFI so aliased above
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let buffer = new LocalSharedArrayBuffer(WRITE_BUFFER_SIZE);
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let lastBytes = dynamicBytes;
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dynamicBytes = new ByteArray(buffer);
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let uint32 = dynamicBytes.uint32 = new Uint32Array(buffer, 0, WRITE_BUFFER_SIZE >> 2);
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uint32[2] = 0;
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dynamicBytes.float64 = new Float64Array(buffer, 0, WRITE_BUFFER_SIZE >> 3);
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buffer.address = getBufferAddress(dynamicBytes);
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uint32.address = buffer.address + uint32.byteOffset;
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dynamicBytes.position = 1; // we start at position 1 to save space for writing the txn id before the txn delimiter
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if (lastPosition) {
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lastBytes.float64[lastPosition + 1] = dynamicBytes.uint32.address + (dynamicBytes.position << 3);
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lastBytes.uint32[lastPosition << 1] = 3; // pointer instruction
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}
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return dynamicBytes;
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}
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var newBufferThreshold = (WRITE_BUFFER_SIZE - maxKeySize - 64) >> 3; // need to reserve more room if we do inline values
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var outstandingWriteCount = 0;
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var startAddress = 0;
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var writeTxn = null;
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var committed;
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var abortedNonChildTransactionWarn;
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var nextTxnCallbacks = [];
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var commitPromise, flushPromise, flushResolvers = [], batchFlushResolvers = [];
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commitDelay = commitDelay || 0;
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eventTurnBatching = eventTurnBatching === false ? false : true;
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var enqueuedCommit;
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var afterCommitCallbacks = [];
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var beforeCommitCallbacks = [];
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var enqueuedEventTurnBatch;
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var batchDepth = 0;
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var lastWritePromise;
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var writeBatchStart, outstandingBatchCount, lastSyncTxnFlush;
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var hasUnresolvedTxns;
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txnStartThreshold = txnStartThreshold || 5;
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batchStartThreshold = batchStartThreshold || 1000;
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maxFlushDelay = maxFlushDelay || 500;
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allocateInstructionBuffer();
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dynamicBytes.uint32[2] = TXN_DELIMITER | TXN_COMMITTED | TXN_FLUSHED;
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var txnResolution, nextResolution = {
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uint32: dynamicBytes.uint32, flagPosition: 2, flag: 0, valueBuffer: null, next: null, meta: null };
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var uncommittedResolution = {
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uint32: null, flagPosition: 2, flag: 0, valueBuffer: null, next: nextResolution, meta: null };
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var unwrittenResolution = nextResolution;
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var lastPromisedResolution = uncommittedResolution;
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var lastQueuedResolution = uncommittedResolution;
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function writeInstructions(flags, store, key, value, version, ifVersion) {
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let writeStatus;
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let targetBytes, position, encoder;
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let valueSize, valueBuffer, valueBufferStart;
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if (flags & 2) {
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// encode first in case we have to write a shared structure
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encoder = store.encoder;
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if (value && value['\x10binary-data\x02'])
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valueBuffer = value['\x10binary-data\x02'];
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else if (encoder) {
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if (encoder.copyBuffers) // use this as indicator for support buffer reuse for now
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valueBuffer = encoder.encode(value, REUSE_BUFFER_MODE$1 | (writeTxn ? RESET_BUFFER_MODE : 0)); // in addition, if we are writing sync, after using, we can immediately reset the encoder's position to reuse that space, which can improve performance
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else { // various other encoders, including JSON.stringify, that might serialize to a string
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valueBuffer = encoder.encode(value);
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if (typeof valueBuffer == 'string')
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valueBuffer = Buffer.from(valueBuffer); // TODO: Would be nice to write strings inline in the instructions
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}
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} else if (typeof value == 'string') {
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valueBuffer = Buffer.from(value); // TODO: Would be nice to write strings inline in the instructions
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} else if (value instanceof Uint8Array)
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valueBuffer = value;
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else
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throw new Error('Invalid value to put in database ' + value + ' (' + (typeof value) +'), consider using encoder');
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valueBufferStart = valueBuffer.start;
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if (valueBufferStart > -1) // if we have buffers with start/end position
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valueSize = valueBuffer.end - valueBufferStart; // size
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else
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valueSize = valueBuffer.length;
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if (store.dupSort && valueSize > maxKeySize)
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throw new Error('The value is larger than the maximum size (' + maxKeySize + ') for a value in a dupSort database');
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} else
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valueSize = 0;
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if (writeTxn) {
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targetBytes = fixedBuffer;
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position = 0;
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} else {
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if (eventTurnBatching && !enqueuedEventTurnBatch && batchDepth == 0) {
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enqueuedEventTurnBatch = queueTask(() => {
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try {
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for (let i = 0, l = beforeCommitCallbacks.length; i < l; i++) {
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try {
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beforeCommitCallbacks[i]();
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} catch(error) {
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console.error('In beforecommit callback', error);
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}
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}
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} catch(error) {
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console.error(error);
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}
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enqueuedEventTurnBatch = null;
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batchDepth--;
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finishBatch();
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if (writeBatchStart)
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writeBatchStart(); // TODO: When we support delay start of batch, optionally don't delay this
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});
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commitPromise = null; // reset the commit promise, can't know if it is really a new transaction prior to finishWrite being called
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flushPromise = null;
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writeBatchStart = writeInstructions(1, store);
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outstandingBatchCount = 0;
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batchDepth++;
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}
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targetBytes = dynamicBytes;
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position = targetBytes.position;
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}
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let uint32 = targetBytes.uint32, float64 = targetBytes.float64;
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let flagPosition = position << 1; // flagPosition is the 32-bit word starting position
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// don't increment position until we are sure we don't have any key writing errors
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if (!uint32) {
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throw new Error('Internal buffers have been corrupted');
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}
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uint32[flagPosition + 1] = store.db.dbi;
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if (flags & 4) {
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let keyStartPosition = (position << 3) + 12;
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let endPosition;
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try {
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endPosition = store.writeKey(key, targetBytes, keyStartPosition);
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if (!(keyStartPosition < endPosition) && (flags & 0xf) != 12)
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throw new Error('Invalid key or zero length key is not allowed in LMDB ' + key)
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} catch(error) {
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targetBytes.fill(0, keyStartPosition);
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if (error.name == 'RangeError')
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error = new Error('Key size is larger than the maximum key size (' + maxKeySize + ')');
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throw error;
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}
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let keySize = endPosition - keyStartPosition;
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if (keySize > maxKeySize) {
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targetBytes.fill(0, keyStartPosition); // restore zeros
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throw new Error('Key size is larger than the maximum key size (' + maxKeySize + ')');
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}
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uint32[flagPosition + 2] = keySize;
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position = (endPosition + 16) >> 3;
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if (flags & 2) {
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let mustCompress;
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if (valueBufferStart > -1) { // if we have buffers with start/end position
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// record pointer to value buffer
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float64[position] = (valueBuffer.address ||
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(valueBuffer.address = getAddress(valueBuffer.buffer))) + valueBufferStart;
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mustCompress = valueBuffer[valueBufferStart] >= 250; // this is the compression indicator, so we must compress
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} else {
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let valueArrayBuffer = valueBuffer.buffer;
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// record pointer to value buffer
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let address = (valueArrayBuffer.address ||
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(valueBuffer.length === 0 ? 0 : // externally allocated buffers of zero-length with the same non-null-pointer can crash node, #161
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valueArrayBuffer.address = getAddress(valueArrayBuffer)))
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+ valueBuffer.byteOffset;
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if (address <= 0 && valueBuffer.length > 0)
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console.error('Supplied buffer had an invalid address', address);
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float64[position] = address;
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mustCompress = valueBuffer[0] >= 250; // this is the compression indicator, so we must compress
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}
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uint32[(position++ << 1) - 1] = valueSize;
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if (store.compression && (valueSize >= store.compression.threshold || mustCompress)) {
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flags |= 0x100000;
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float64[position] = store.compression.address;
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if (!writeTxn)
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compress(env.address, uint32.address + (position << 3), () => {
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// this is never actually called in NodeJS, just use to pin the buffer in memory until it is finished
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// and is a no-op in Deno
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if (!float64)
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throw new Error('No float64 available');
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});
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position++;
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}
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}
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if (ifVersion !== undefined) {
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if (ifVersion === null)
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flags |= 0x10; // if it does not exist, MDB_NOOVERWRITE
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else {
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flags |= 0x100;
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float64[position++] = ifVersion;
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}
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}
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if (version !== undefined) {
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flags |= 0x200;
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float64[position++] = version || 0;
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}
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} else
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position++;
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targetBytes.position = position;
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if (writeTxn) {
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uint32[0] = flags;
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write(env.address, uint32.address);
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return () => (uint32[0] & FAILED_CONDITION) ? SYNC_PROMISE_FAIL : SYNC_PROMISE_SUCCESS;
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}
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// if we ever use buffers that haven't been zero'ed, need to clear out the next slot like this:
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// uint32[position << 1] = 0 // clear out the next slot
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let nextUint32;
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if (position > newBufferThreshold) {
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targetBytes = allocateInstructionBuffer(position);
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position = targetBytes.position;
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nextUint32 = targetBytes.uint32;
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} else
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nextUint32 = uint32;
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let resolution = nextResolution;
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// create the placeholder next resolution
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nextResolution = resolution.next = { // we try keep resolutions exactly the same object type
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uint32: nextUint32,
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flagPosition: position << 1,
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flag: 0, // TODO: eventually eliminate this, as we can probably signify HAS_TXN/NO_RESOLVE/FAILED_CONDITION in upper bits
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valueBuffer: fixedBuffer, // these are all just placeholders so that we have the right hidden class initially allocated
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next: null,
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meta: null,
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};
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lastQueuedResolution = resolution;
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let writtenBatchDepth = batchDepth;
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return (callback) => {
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if (writtenBatchDepth) {
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// if we are in a batch, the transaction can't close, so we do the faster,
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// but non-deterministic updates, knowing that the write thread can
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// just poll for the status change if we miss a status update
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writeStatus = uint32[flagPosition];
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uint32[flagPosition] = flags;
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//writeStatus = Atomics.or(uint32, flagPosition, flags)
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if (writeBatchStart && !writeStatus) {
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outstandingBatchCount += 1 + (valueSize >> 12);
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if (outstandingBatchCount > batchStartThreshold) {
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outstandingBatchCount = 0;
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writeBatchStart();
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writeBatchStart = null;
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}
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}
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} else // otherwise the transaction could end at any time and we need to know the
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// deterministically if it is ending, so we can reset the commit promise
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// so we use the slower atomic operation
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writeStatus = Atomics.or(uint32, flagPosition, flags);
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outstandingWriteCount++;
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if (writeStatus & TXN_DELIMITER) {
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commitPromise = null; // TODO: Don't reset these if this comes from the batch start operation on an event turn batch
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flushPromise = null;
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flushResolvers = [];
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queueCommitResolution(resolution);
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if (!startAddress) {
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startAddress = uint32.address + (flagPosition << 2);
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}
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}
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if (!writtenBatchDepth && batchFlushResolvers.length > 0) {
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flushResolvers.push(...batchFlushResolvers);
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batchFlushResolvers = [];
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}
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if (!flushPromise && overlappingSync) {
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flushPromise = new Promise(resolve => {
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if (writtenBatchDepth) {
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batchFlushResolvers.push(resolve);
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} else {
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flushResolvers.push(resolve);
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}
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});
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}
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if (writeStatus & WAITING_OPERATION) { // write thread is waiting
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write(env.address, 0);
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}
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if (outstandingWriteCount > BACKPRESSURE_THRESHOLD && !writeBatchStart) {
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if (!backpressureArray)
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backpressureArray = new Int32Array(new SharedArrayBuffer(4), 0, 1);
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Atomics.wait(backpressureArray, 0, 0, Math.round(outstandingWriteCount / BACKPRESSURE_THRESHOLD));
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}
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if (startAddress) {
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if (eventTurnBatching)
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startWriting(); // start writing immediately because this has already been batched/queued
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else if (!enqueuedCommit && txnStartThreshold) {
|
|
enqueuedCommit = (commitDelay == 0 && typeof setImmediate != 'undefined') ? setImmediate(() => startWriting()) : setTimeout(() => startWriting(), commitDelay);
|
|
} else if (outstandingWriteCount > txnStartThreshold)
|
|
startWriting();
|
|
}
|
|
|
|
if ((outstandingWriteCount & 7) === 0)
|
|
resolveWrites();
|
|
|
|
if (store.cache) {
|
|
resolution.meta = {
|
|
key,
|
|
store,
|
|
valueSize: valueBuffer ? valueBuffer.length : 0,
|
|
};
|
|
}
|
|
resolution.valueBuffer = valueBuffer;
|
|
|
|
if (callback) {
|
|
if (callback === IF_EXISTS$1)
|
|
ifVersion = IF_EXISTS$1;
|
|
else {
|
|
let meta = resolution.meta || (resolution.meta = {});
|
|
meta.reject = callback;
|
|
meta.resolve = (value) => callback(null, value);
|
|
return;
|
|
}
|
|
}
|
|
if (ifVersion === undefined) {
|
|
if (writtenBatchDepth > 1) {
|
|
if (!resolution.flag && !store.cache)
|
|
resolution.flag = NO_RESOLVE;
|
|
return PROMISE_SUCCESS; // or return undefined?
|
|
}
|
|
if (commitPromise) {
|
|
if (!resolution.flag)
|
|
resolution.flag = NO_RESOLVE;
|
|
} else {
|
|
commitPromise = new Promise((resolve, reject) => {
|
|
let meta = resolution.meta || (resolution.meta = {});
|
|
meta.resolve = resolve;
|
|
resolve.unconditional = true;
|
|
meta.reject = reject;
|
|
});
|
|
if (separateFlushed)
|
|
commitPromise.flushed = overlappingSync ? flushPromise : commitPromise;
|
|
}
|
|
return commitPromise;
|
|
}
|
|
lastWritePromise = new Promise((resolve, reject) => {
|
|
let meta = resolution.meta || (resolution.meta = {});
|
|
meta.resolve = resolve;
|
|
meta.reject = reject;
|
|
});
|
|
if (separateFlushed)
|
|
lastWritePromise.flushed = overlappingSync ? flushPromise : lastWritePromise;
|
|
return lastWritePromise;
|
|
};
|
|
}
|
|
Promise.resolve();
|
|
function startWriting() {
|
|
if (enqueuedCommit) {
|
|
clearImmediate(enqueuedCommit);
|
|
enqueuedCommit = null;
|
|
}
|
|
let resolvers = flushResolvers;
|
|
env.startWriting(startAddress, (status) => {
|
|
if (dynamicBytes.uint32[dynamicBytes.position << 1] & TXN_DELIMITER)
|
|
queueCommitResolution(nextResolution);
|
|
|
|
resolveWrites(true);
|
|
switch (status) {
|
|
case 0:
|
|
for (let resolver of resolvers) {
|
|
resolver();
|
|
}
|
|
break;
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
hasUnresolvedTxns = false;
|
|
executeTxnCallbacks();
|
|
return hasUnresolvedTxns;
|
|
default:
|
|
try {
|
|
lmdbError(status);
|
|
} catch(error) {
|
|
console.error(error);
|
|
if (commitRejectPromise) {
|
|
commitRejectPromise.reject(error);
|
|
commitRejectPromise = null;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
startAddress = 0;
|
|
}
|
|
|
|
function queueCommitResolution(resolution) {
|
|
if (!(resolution.flag & HAS_TXN)) {
|
|
resolution.flag = HAS_TXN;
|
|
if (txnResolution) {
|
|
txnResolution.nextTxn = resolution;
|
|
//outstandingWriteCount = 0
|
|
}
|
|
else
|
|
txnResolution = resolution;
|
|
}
|
|
}
|
|
var TXN_DONE = TXN_COMMITTED | TXN_FAILED;
|
|
function resolveWrites(async) {
|
|
// clean up finished instructions
|
|
let instructionStatus;
|
|
while ((instructionStatus = unwrittenResolution.uint32[unwrittenResolution.flagPosition])
|
|
& 0x1000000) {
|
|
if (unwrittenResolution.callbacks) {
|
|
nextTxnCallbacks.push(unwrittenResolution.callbacks);
|
|
unwrittenResolution.callbacks = null;
|
|
}
|
|
outstandingWriteCount--;
|
|
if (unwrittenResolution.flag !== HAS_TXN) {
|
|
if (unwrittenResolution.flag === NO_RESOLVE && !unwrittenResolution.meta) {
|
|
// in this case we can completely remove from the linked list, clearing more memory
|
|
lastPromisedResolution.next = unwrittenResolution = unwrittenResolution.next;
|
|
continue;
|
|
}
|
|
unwrittenResolution.uint32 = null;
|
|
}
|
|
unwrittenResolution.valueBuffer = null;
|
|
unwrittenResolution.flag = instructionStatus;
|
|
lastPromisedResolution = unwrittenResolution;
|
|
unwrittenResolution = unwrittenResolution.next;
|
|
}
|
|
while (txnResolution &&
|
|
(instructionStatus = txnResolution.uint32[txnResolution.flagPosition] & TXN_DONE)) {
|
|
if (instructionStatus & TXN_FAILED)
|
|
rejectCommit();
|
|
else
|
|
resolveCommit(async);
|
|
}
|
|
}
|
|
|
|
function resolveCommit(async) {
|
|
afterCommit(txnResolution.uint32[txnResolution.flagPosition - 1]);
|
|
if (async)
|
|
resetReadTxn();
|
|
else
|
|
queueMicrotask(resetReadTxn); // TODO: only do this if there are actually committed writes?
|
|
do {
|
|
if (uncommittedResolution.meta && uncommittedResolution.meta.resolve) {
|
|
let resolve = uncommittedResolution.meta.resolve;
|
|
if (uncommittedResolution.flag & FAILED_CONDITION && !resolve.unconditional)
|
|
resolve(false);
|
|
else
|
|
resolve(true);
|
|
}
|
|
} while((uncommittedResolution = uncommittedResolution.next) && uncommittedResolution != txnResolution)
|
|
txnResolution = txnResolution.nextTxn;
|
|
}
|
|
var commitRejectPromise;
|
|
function rejectCommit() {
|
|
afterCommit();
|
|
if (!commitRejectPromise) {
|
|
let rejectFunction;
|
|
commitRejectPromise = new Promise((resolve, reject) => rejectFunction = reject);
|
|
commitRejectPromise.reject = rejectFunction;
|
|
}
|
|
do {
|
|
if (uncommittedResolution.meta && uncommittedResolution.meta.reject) {
|
|
uncommittedResolution.flag & 0xf;
|
|
let error = new Error("Commit failed (see commitError for details)");
|
|
error.commitError = commitRejectPromise;
|
|
uncommittedResolution.meta.reject(error);
|
|
}
|
|
} while((uncommittedResolution = uncommittedResolution.next) && uncommittedResolution != txnResolution)
|
|
txnResolution = txnResolution.nextTxn;
|
|
}
|
|
function atomicStatus(uint32, flagPosition, newStatus) {
|
|
if (batchDepth) {
|
|
// if we are in a batch, the transaction can't close, so we do the faster,
|
|
// but non-deterministic updates, knowing that the write thread can
|
|
// just poll for the status change if we miss a status update
|
|
let writeStatus = uint32[flagPosition];
|
|
uint32[flagPosition] = newStatus;
|
|
return writeStatus;
|
|
//return Atomics.or(uint32, flagPosition, newStatus)
|
|
} else // otherwise the transaction could end at any time and we need to know the
|
|
// deterministically if it is ending, so we can reset the commit promise
|
|
// so we use the slower atomic operation
|
|
try {
|
|
return Atomics.or(uint32, flagPosition, newStatus);
|
|
} catch(error) {
|
|
console.error(error);
|
|
return;
|
|
}
|
|
}
|
|
function afterCommit(txnId) {
|
|
for (let i = 0, l = afterCommitCallbacks.length; i < l; i++) {
|
|
try {
|
|
afterCommitCallbacks[i]({next: uncommittedResolution, last: txnResolution, txnId});
|
|
} catch(error) {
|
|
console.error('In aftercommit callback', error);
|
|
}
|
|
}
|
|
}
|
|
async function executeTxnCallbacks() {
|
|
env.writeTxn = writeTxn = { write: true };
|
|
nextTxnCallbacks.isExecuting = true;
|
|
for (let i = 0; i < nextTxnCallbacks.length; i++) {
|
|
let txnCallbacks = nextTxnCallbacks[i];
|
|
for (let j = 0, l = txnCallbacks.length; j < l; j++) {
|
|
let userTxnCallback = txnCallbacks[j];
|
|
let asChild = userTxnCallback.asChild;
|
|
if (asChild) {
|
|
env.beginTxn(1); // abortable
|
|
let parentTxn = writeTxn;
|
|
env.writeTxn = writeTxn = { write: true };
|
|
try {
|
|
let result = userTxnCallback.callback();
|
|
if (result && result.then) {
|
|
hasUnresolvedTxns = true;
|
|
await result;
|
|
}
|
|
if (result === ABORT)
|
|
env.abortTxn();
|
|
else
|
|
env.commitTxn();
|
|
clearWriteTxn(parentTxn);
|
|
txnCallbacks[j] = result;
|
|
} catch(error) {
|
|
clearWriteTxn(parentTxn);
|
|
env.abortTxn();
|
|
txnError(error, txnCallbacks, j);
|
|
}
|
|
} else {
|
|
try {
|
|
let result = userTxnCallback();
|
|
txnCallbacks[j] = result;
|
|
if (result && result.then) {
|
|
hasUnresolvedTxns = true;
|
|
await result;
|
|
}
|
|
} catch(error) {
|
|
txnError(error, txnCallbacks, j);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
nextTxnCallbacks = [];
|
|
clearWriteTxn(null);
|
|
if (hasUnresolvedTxns) {
|
|
env.resumeWriting();
|
|
}
|
|
function txnError(error, txnCallbacks, i) {
|
|
(txnCallbacks.errors || (txnCallbacks.errors = []))[i] = error;
|
|
txnCallbacks[i] = CALLBACK_THREW;
|
|
}
|
|
}
|
|
function finishBatch() {
|
|
dynamicBytes.uint32[(dynamicBytes.position + 1) << 1] = 0; // clear out the next slot
|
|
let writeStatus = atomicStatus(dynamicBytes.uint32, (dynamicBytes.position++) << 1, 2); // atomically write the end block
|
|
nextResolution.flagPosition += 2;
|
|
if (writeStatus & WAITING_OPERATION) {
|
|
write(env.address, 0);
|
|
}
|
|
if (dynamicBytes.position > newBufferThreshold) {
|
|
allocateInstructionBuffer(dynamicBytes.position);
|
|
nextResolution.flagPosition = dynamicBytes.position << 1;
|
|
nextResolution.uint32 = dynamicBytes.uint32;
|
|
}
|
|
}
|
|
function clearWriteTxn(parentTxn) {
|
|
// TODO: We might actually want to track cursors in a write txn and manually
|
|
// close them.
|
|
if (writeTxn && writeTxn.refCount > 0)
|
|
writeTxn.isDone = true;
|
|
env.writeTxn = writeTxn = parentTxn || null;
|
|
}
|
|
Object.assign(LMDBStore.prototype, {
|
|
put(key, value, versionOrOptions, ifVersion) {
|
|
let callback, flags = 15, type = typeof versionOrOptions;
|
|
if (type == 'object' && versionOrOptions) {
|
|
if (versionOrOptions.noOverwrite)
|
|
flags |= 0x10;
|
|
if (versionOrOptions.noDupData)
|
|
flags |= 0x20;
|
|
if (versionOrOptions.append)
|
|
flags |= 0x20000;
|
|
if (versionOrOptions.ifVersion != undefined)
|
|
ifVersion = versionOrOptions.ifVersion;
|
|
versionOrOptions = versionOrOptions.version;
|
|
if (typeof ifVersion == 'function')
|
|
callback = ifVersion;
|
|
} else if (type == 'function') {
|
|
callback = versionOrOptions;
|
|
}
|
|
return writeInstructions(flags, this, key, value, this.useVersions ? versionOrOptions || 0 : undefined, ifVersion)(callback);
|
|
},
|
|
remove(key, ifVersionOrValue, callback) {
|
|
let flags = 13;
|
|
let ifVersion, value;
|
|
if (ifVersionOrValue !== undefined) {
|
|
if (typeof ifVersionOrValue == 'function')
|
|
callback = ifVersionOrValue;
|
|
else if (ifVersionOrValue === IF_EXISTS$1 && !callback)
|
|
// we have a handler for IF_EXISTS in the callback handler for remove
|
|
callback = ifVersionOrValue;
|
|
else if (this.useVersions)
|
|
ifVersion = ifVersionOrValue;
|
|
else {
|
|
flags = 14;
|
|
value = ifVersionOrValue;
|
|
}
|
|
}
|
|
return writeInstructions(flags, this, key, value, undefined, ifVersion)(callback);
|
|
},
|
|
del(key, options, callback) {
|
|
return this.remove(key, options, callback);
|
|
},
|
|
ifNoExists(key, callback) {
|
|
return this.ifVersion(key, null, callback);
|
|
},
|
|
ifVersion(key, version, callback, options) {
|
|
if (!callback) {
|
|
return new Batch((operations, callback) => {
|
|
let promise = this.ifVersion(key, version, operations, options);
|
|
if (callback)
|
|
promise.then(callback);
|
|
return promise;
|
|
});
|
|
}
|
|
if (writeTxn) {
|
|
if (version === undefined || this.doesExist(key, version)) {
|
|
callback();
|
|
return SYNC_PROMISE_SUCCESS;
|
|
}
|
|
return SYNC_PROMISE_FAIL;
|
|
}
|
|
let flags = key === undefined || version === undefined ? 1 : 4;
|
|
if (options?.ifLessThan)
|
|
flags |= CONDITIONAL_VERSION_LESS_THAN;
|
|
if (options?.allowNotFound)
|
|
flags |= CONDITIONAL_ALLOW_NOTFOUND;
|
|
let finishStartWrite = writeInstructions(flags, this, key, undefined, undefined, version);
|
|
let promise;
|
|
batchDepth += 2;
|
|
if (batchDepth > 2)
|
|
promise = finishStartWrite();
|
|
else {
|
|
writeBatchStart = () => {
|
|
promise = finishStartWrite();
|
|
};
|
|
outstandingBatchCount = 0;
|
|
}
|
|
try {
|
|
if (typeof callback === 'function') {
|
|
callback();
|
|
} else {
|
|
for (let i = 0, l = callback.length; i < l; i++) {
|
|
let operation = callback[i];
|
|
this[operation.type](operation.key, operation.value);
|
|
}
|
|
}
|
|
} finally {
|
|
if (!promise) {
|
|
finishBatch();
|
|
batchDepth -= 2;
|
|
promise = finishStartWrite(); // finish write once all the operations have been written (and it hasn't been written prematurely)
|
|
writeBatchStart = null;
|
|
} else {
|
|
batchDepth -= 2;
|
|
finishBatch();
|
|
}
|
|
}
|
|
return promise;
|
|
},
|
|
batch(callbackOrOperations) {
|
|
return this.ifVersion(undefined, undefined, callbackOrOperations);
|
|
},
|
|
drop(callback) {
|
|
return writeInstructions(1024 + 12, this, Buffer.from([]), undefined, undefined, undefined)(callback);
|
|
},
|
|
clearAsync(callback) {
|
|
if (this.encoder) {
|
|
if (this.encoder.clearSharedData)
|
|
this.encoder.clearSharedData();
|
|
else if (this.encoder.structures)
|
|
this.encoder.structures = [];
|
|
}
|
|
return writeInstructions(12, this, Buffer.from([]), undefined, undefined, undefined)(callback);
|
|
},
|
|
_triggerError() {
|
|
finishBatch();
|
|
},
|
|
|
|
putSync(key, value, versionOrOptions, ifVersion) {
|
|
if (writeTxn)
|
|
return this.put(key, value, versionOrOptions, ifVersion) === SYNC_PROMISE_SUCCESS;
|
|
else
|
|
return this.transactionSync(() =>
|
|
this.put(key, value, versionOrOptions, ifVersion) === SYNC_PROMISE_SUCCESS, overlappingSync? 0x10002 : 2); // non-abortable, async flush
|
|
},
|
|
removeSync(key, ifVersionOrValue) {
|
|
if (writeTxn)
|
|
return this.remove(key, ifVersionOrValue) === SYNC_PROMISE_SUCCESS;
|
|
else
|
|
return this.transactionSync(() =>
|
|
this.remove(key, ifVersionOrValue) === SYNC_PROMISE_SUCCESS, overlappingSync? 0x10002 : 2); // non-abortable, async flush
|
|
},
|
|
transaction(callback) {
|
|
if (writeTxn && !nextTxnCallbacks.isExecuting) {
|
|
// already nested in a transaction, just execute and return
|
|
return callback();
|
|
}
|
|
return this.transactionAsync(callback);
|
|
},
|
|
childTransaction(callback) {
|
|
if (useWritemap)
|
|
throw new Error('Child transactions are not supported in writemap mode');
|
|
if (writeTxn) {
|
|
let parentTxn = writeTxn;
|
|
let thisTxn = env.writeTxn = writeTxn = { write: true };
|
|
env.beginTxn(1); // abortable
|
|
let callbackDone, finishTxn;
|
|
try {
|
|
return writeTxn.childResults = when(callback(), finishTxn = (result) => {
|
|
if (writeTxn !== thisTxn) // need to wait for child txn to finish asynchronously
|
|
return writeTxn.childResults.then(() => finishTxn(result));
|
|
callbackDone = true;
|
|
if (result === ABORT)
|
|
env.abortTxn();
|
|
else
|
|
env.commitTxn();
|
|
clearWriteTxn(parentTxn);
|
|
return result;
|
|
}, (error) => {
|
|
env.abortTxn();
|
|
clearWriteTxn(parentTxn);
|
|
throw error;
|
|
});
|
|
} catch(error) {
|
|
if (!callbackDone)
|
|
env.abortTxn();
|
|
clearWriteTxn(parentTxn);
|
|
throw error;
|
|
}
|
|
}
|
|
return this.transactionAsync(callback, true);
|
|
},
|
|
transactionAsync(callback, asChild) {
|
|
let txnIndex;
|
|
let txnCallbacks;
|
|
if (lastQueuedResolution.callbacks) {
|
|
txnCallbacks = lastQueuedResolution.callbacks;
|
|
txnIndex = txnCallbacks.push(asChild ? { callback, asChild } : callback) - 1;
|
|
} else if (nextTxnCallbacks.isExecuting) {
|
|
txnCallbacks = [asChild ? { callback, asChild } : callback];
|
|
txnCallbacks.results = commitPromise;
|
|
nextTxnCallbacks.push(txnCallbacks);
|
|
txnIndex = 0;
|
|
} else {
|
|
if (writeTxn)
|
|
throw new Error('Can not enqueue transaction during write txn');
|
|
let finishWrite = writeInstructions(8 | (this.strictAsyncOrder ? 0x100000 : 0), this);
|
|
txnCallbacks = [asChild ? { callback, asChild } : callback];
|
|
lastQueuedResolution.callbacks = txnCallbacks;
|
|
lastQueuedResolution.id = Math.random();
|
|
txnCallbacks.results = finishWrite();
|
|
txnIndex = 0;
|
|
}
|
|
return txnCallbacks.results.then((results) => {
|
|
let result = txnCallbacks[txnIndex];
|
|
if (result === CALLBACK_THREW)
|
|
throw txnCallbacks.errors[txnIndex];
|
|
return result;
|
|
});
|
|
},
|
|
transactionSync(callback, flags) {
|
|
if (writeTxn) {
|
|
if (!useWritemap && (flags == undefined || (flags & 1))) // can't use child transactions in write maps
|
|
// already nested in a transaction, execute as child transaction (if possible) and return
|
|
return this.childTransaction(callback);
|
|
let result = callback(); // else just run in current transaction
|
|
if (result == ABORT && !abortedNonChildTransactionWarn) {
|
|
console.warn('Can not abort a transaction inside another transaction with ' + (this.cache ? 'caching enabled' : 'useWritemap enabled'));
|
|
abortedNonChildTransactionWarn = true;
|
|
}
|
|
return result;
|
|
}
|
|
let callbackDone, finishTxn;
|
|
this.transactions++;
|
|
if (!env.address)
|
|
throw new Error('The database has been closed and you can not transact on it');
|
|
env.beginTxn(flags == undefined ? 3 : flags);
|
|
let thisTxn = writeTxn = env.writeTxn = { write: true };
|
|
try {
|
|
this.emit('begin-transaction');
|
|
return writeTxn.childResults = when(callback(), finishTxn = (result) => {
|
|
if (writeTxn !== thisTxn) // need to wait for child txn to finish asynchronously
|
|
return writeTxn.childResults.then(() => finishTxn(result));
|
|
try {
|
|
callbackDone = true;
|
|
if (result === ABORT)
|
|
env.abortTxn();
|
|
else {
|
|
env.commitTxn();
|
|
resetReadTxn();
|
|
}
|
|
return result;
|
|
} finally {
|
|
clearWriteTxn(null);
|
|
}
|
|
}, (error) => {
|
|
try { env.abortTxn(); } catch(e) {}
|
|
clearWriteTxn(null);
|
|
throw error;
|
|
});
|
|
} catch(error) {
|
|
if (!callbackDone)
|
|
try { env.abortTxn(); } catch(e) {}
|
|
clearWriteTxn(null);
|
|
throw error;
|
|
}
|
|
},
|
|
transactionSyncStart(callback) {
|
|
return this.transactionSync(callback, 0);
|
|
},
|
|
// make the db a thenable/promise-like for when the last commit is committed
|
|
committed: committed = {
|
|
then(onfulfilled, onrejected) {
|
|
if (commitPromise)
|
|
return commitPromise.then(onfulfilled, onrejected);
|
|
if (lastWritePromise) // always resolve to true
|
|
return lastWritePromise.then(() => onfulfilled(true), onrejected);
|
|
return SYNC_PROMISE_SUCCESS.then(onfulfilled, onrejected);
|
|
}
|
|
},
|
|
flushed: {
|
|
// make this a thenable for when the commit is flushed to disk
|
|
then(onfulfilled, onrejected) {
|
|
if (flushPromise)
|
|
flushPromise.hasCallbacks = true;
|
|
return Promise.all([flushPromise || committed, lastSyncTxnFlush]).then(onfulfilled, onrejected);
|
|
}
|
|
},
|
|
_endWrites(resolvedPromise, resolvedSyncPromise) {
|
|
this.put = this.remove = this.del = this.batch = this.removeSync = this.putSync = this.transactionAsync = this.drop = this.clearAsync = () => { throw new Error('Database is closed') };
|
|
// wait for all txns to finish, checking again after the current txn is done
|
|
let finalPromise = flushPromise || commitPromise || lastWritePromise;
|
|
if (flushPromise)
|
|
flushPromise.hasCallbacks = true;
|
|
let finalSyncPromise = lastSyncTxnFlush;
|
|
if (finalPromise && resolvedPromise != finalPromise ||
|
|
finalSyncPromise ) {
|
|
return Promise.all([finalPromise, finalSyncPromise]).then(() => this._endWrites(finalPromise, finalSyncPromise), () => this._endWrites(finalPromise, finalSyncPromise));
|
|
}
|
|
Object.defineProperty(env, 'sync', { value: null });
|
|
},
|
|
on(event, callback) {
|
|
if (event == 'beforecommit') {
|
|
eventTurnBatching = true;
|
|
beforeCommitCallbacks.push(callback);
|
|
} else if (event == 'aftercommit')
|
|
afterCommitCallbacks.push(callback);
|
|
else
|
|
super.on(event, callback);
|
|
}
|
|
});
|
|
}
|
|
|
|
class Batch extends Array {
|
|
constructor(callback) {
|
|
super();
|
|
this.callback = callback;
|
|
}
|
|
put(key, value) {
|
|
this.push({ type: 'put', key, value });
|
|
}
|
|
del(key) {
|
|
this.push({ type: 'del', key });
|
|
}
|
|
clear() {
|
|
this.splice(0, this.length);
|
|
}
|
|
write(callback) {
|
|
return this.callback(this, callback);
|
|
}
|
|
}
|
|
function asBinary(buffer) {
|
|
return {
|
|
['\x10binary-data\x02']: buffer
|
|
};
|
|
}
|
|
|
|
const SKIP = {};
|
|
const DONE = {
|
|
value: null,
|
|
done: true,
|
|
};
|
|
if (!Symbol.asyncIterator) {
|
|
Symbol.asyncIterator = Symbol.for('Symbol.asyncIterator');
|
|
}
|
|
|
|
class RangeIterable {
|
|
constructor(sourceArray) {
|
|
if (sourceArray) {
|
|
this.iterate = sourceArray[Symbol.iterator].bind(sourceArray);
|
|
}
|
|
}
|
|
map(func) {
|
|
let source = this;
|
|
let iterable = new RangeIterable();
|
|
iterable.iterate = (async) => {
|
|
let iterator = source[Symbol.iterator](async);
|
|
let i = 0;
|
|
return {
|
|
next(resolvedResult) {
|
|
let result;
|
|
do {
|
|
let iteratorResult;
|
|
if (resolvedResult) {
|
|
iteratorResult = resolvedResult;
|
|
resolvedResult = null; // don't go in this branch on next iteration
|
|
} else {
|
|
iteratorResult = iterator.next();
|
|
if (iteratorResult.then) {
|
|
return iteratorResult.then(iteratorResult => this.next(iteratorResult));
|
|
}
|
|
}
|
|
if (iteratorResult.done === true) {
|
|
this.done = true;
|
|
if (iterable.onDone) iterable.onDone();
|
|
return iteratorResult;
|
|
}
|
|
result = func(iteratorResult.value, i++);
|
|
if (result && result.then) {
|
|
return result.then(result =>
|
|
result === SKIP ?
|
|
this.next() :
|
|
{
|
|
value: result
|
|
});
|
|
}
|
|
} while(result === SKIP);
|
|
if (result === DONE) {
|
|
if (iterable.onDone) iterable.onDone();
|
|
return result;
|
|
}
|
|
return {
|
|
value: result
|
|
};
|
|
},
|
|
return() {
|
|
if (iterable.onDone) iterable.onDone();
|
|
return iterator.return();
|
|
},
|
|
throw() {
|
|
if (iterable.onDone) iterable.onDone();
|
|
return iterator.throw();
|
|
}
|
|
};
|
|
};
|
|
return iterable;
|
|
}
|
|
[Symbol.asyncIterator]() {
|
|
return this.iterator = this.iterate();
|
|
}
|
|
[Symbol.iterator]() {
|
|
return this.iterator = this.iterate();
|
|
}
|
|
filter(func) {
|
|
return this.map(element => {
|
|
let result = func(element);
|
|
// handle promise
|
|
if (result?.then) return result.then((result) => result ? element : SKIP);
|
|
else return result ? element : SKIP;
|
|
});
|
|
}
|
|
|
|
forEach(callback) {
|
|
let iterator = this.iterator = this.iterate();
|
|
let result;
|
|
while ((result = iterator.next()).done !== true) {
|
|
callback(result.value);
|
|
}
|
|
}
|
|
concat(secondIterable) {
|
|
let concatIterable = new RangeIterable();
|
|
concatIterable.iterate = (async) => {
|
|
let iterator = this.iterator = this.iterate();
|
|
let isFirst = true;
|
|
function iteratorDone(result) {
|
|
if (isFirst) {
|
|
isFirst = false;
|
|
iterator = secondIterable[Symbol.iterator](async);
|
|
result = iterator.next();
|
|
if (concatIterable.onDone) {
|
|
if (result.then)
|
|
result.then((result) => {
|
|
if (result.done()) concatIterable.onDone();
|
|
});
|
|
else if (result.done) concatIterable.onDone();
|
|
}
|
|
} else {
|
|
if (concatIterable.onDone) concatIterable.onDone();
|
|
}
|
|
return result;
|
|
}
|
|
return {
|
|
next() {
|
|
let result = iterator.next();
|
|
if (result.then)
|
|
return result.then((result) => {
|
|
if (result.done) return iteratorDone(result);
|
|
return result;
|
|
});
|
|
if (result.done) return iteratorDone(result);
|
|
return result;
|
|
},
|
|
return() {
|
|
if (concatIterable.onDone) concatIterable.onDone();
|
|
return iterator.return();
|
|
},
|
|
throw() {
|
|
if (concatIterable.onDone) concatIterable.onDone();
|
|
return iterator.throw();
|
|
}
|
|
};
|
|
};
|
|
return concatIterable;
|
|
}
|
|
|
|
flatMap(callback) {
|
|
let mappedIterable = new RangeIterable();
|
|
mappedIterable.iterate = (async) => {
|
|
let iterator = this.iterator = this.iterate(async);
|
|
let currentSubIterator;
|
|
return {
|
|
next() {
|
|
do {
|
|
if (currentSubIterator) {
|
|
let result = currentSubIterator.next();
|
|
if (!result.done) {
|
|
return result;
|
|
}
|
|
}
|
|
let result = iterator.next();
|
|
if (result.done) {
|
|
if (mappedIterable.onDone) mappedIterable.onDone();
|
|
return result;
|
|
}
|
|
let value = callback(result.value);
|
|
if (Array.isArray(value) || value instanceof RangeIterable)
|
|
currentSubIterator = value[Symbol.iterator]();
|
|
else {
|
|
currentSubIterator = null;
|
|
return { value };
|
|
}
|
|
} while(true);
|
|
},
|
|
return() {
|
|
if (mappedIterable.onDone) mappedIterable.onDone();
|
|
if (currentSubIterator)
|
|
currentSubIterator.return();
|
|
return iterator.return();
|
|
},
|
|
throw() {
|
|
if (mappedIterable.onDone) mappedIterable.onDone();
|
|
if (currentSubIterator)
|
|
currentSubIterator.throw();
|
|
return iterator.throw();
|
|
}
|
|
};
|
|
};
|
|
return mappedIterable;
|
|
}
|
|
|
|
slice(start, end) {
|
|
return this.map((element, i) => {
|
|
if (i < start)
|
|
return SKIP;
|
|
if (i >= end) {
|
|
DONE.value = element;
|
|
return DONE;
|
|
}
|
|
return element;
|
|
});
|
|
}
|
|
next() {
|
|
if (!this.iterator)
|
|
this.iterator = this.iterate();
|
|
return this.iterator.next();
|
|
}
|
|
toJSON() {
|
|
if (this.asArray && this.asArray.forEach) {
|
|
return this.asArray;
|
|
}
|
|
throw new Error('Can not serialize async iterables without first calling resolveJSON');
|
|
//return Array.from(this)
|
|
}
|
|
get asArray() {
|
|
if (this._asArray)
|
|
return this._asArray;
|
|
let promise = new Promise((resolve, reject) => {
|
|
let iterator = this.iterate();
|
|
let array = [];
|
|
let iterable = this;
|
|
Object.defineProperty(array, 'iterable', { value: iterable });
|
|
function next(result) {
|
|
while (result.done !== true) {
|
|
if (result.then) {
|
|
return result.then(next);
|
|
} else {
|
|
array.push(result.value);
|
|
}
|
|
result = iterator.next();
|
|
}
|
|
resolve(iterable._asArray = array);
|
|
}
|
|
next(iterator.next());
|
|
});
|
|
promise.iterable = this;
|
|
return this._asArray || (this._asArray = promise);
|
|
}
|
|
resolveData() {
|
|
return this.asArray;
|
|
}
|
|
}
|
|
RangeIterable.prototype.DONE = DONE;
|
|
|
|
const REUSE_BUFFER_MODE = 512;
|
|
const writeUint32Key = (key, target, start) => {
|
|
(target.dataView || (target.dataView = new DataView(target.buffer, 0, target.length))).setUint32(start, key, true);
|
|
return start + 4;
|
|
};
|
|
const readUint32Key = (target, start) => {
|
|
return (target.dataView || (target.dataView = new DataView(target.buffer, 0, target.length))).getUint32(start, true);
|
|
};
|
|
const writeBufferKey = (key, target, start) => {
|
|
target.set(key, start);
|
|
return key.length + start;
|
|
};
|
|
const Uint8ArraySlice$1 = Uint8Array.prototype.slice;
|
|
const readBufferKey = (target, start, end) => {
|
|
return Uint8ArraySlice$1.call(target, start, end);
|
|
};
|
|
|
|
let lastEncodedValue, bytes;
|
|
function applyKeyHandling(store) {
|
|
if (store.encoding == 'ordered-binary') {
|
|
store.encoder = store.decoder = {
|
|
writeKey: orderedBinary.writeKey,
|
|
readKey: orderedBinary.readKey,
|
|
};
|
|
}
|
|
if (store.encoder && store.encoder.writeKey && !store.encoder.encode) {
|
|
store.encoder.encode = function(value, mode) {
|
|
if (typeof value !== 'object' && value && value === lastEncodedValue) ; else {
|
|
lastEncodedValue = value;
|
|
bytes = saveKey(value, this.writeKey, false, store.maxKeySize);
|
|
}
|
|
if (bytes.end > 0 && !(REUSE_BUFFER_MODE & mode)) {
|
|
return bytes.subarray(bytes.start, bytes.end);
|
|
}
|
|
return bytes;
|
|
};
|
|
store.encoder.copyBuffers = true; // just an indicator for the buffer reuse in write.js
|
|
}
|
|
if (store.decoder && store.decoder.readKey && !store.decoder.decode) {
|
|
store.decoder.decode = function(buffer) { return this.readKey(buffer, 0, buffer.length); };
|
|
store.decoderCopies = true;
|
|
}
|
|
if (store.keyIsUint32 || store.keyEncoding == 'uint32') {
|
|
store.writeKey = writeUint32Key;
|
|
store.readKey = readUint32Key;
|
|
} else if (store.keyIsBuffer || store.keyEncoding == 'binary') {
|
|
store.writeKey = writeBufferKey;
|
|
store.readKey = readBufferKey;
|
|
} else if (store.keyEncoder) {
|
|
store.writeKey = store.keyEncoder.writeKey;
|
|
store.readKey = store.keyEncoder.readKey;
|
|
} else {
|
|
store.writeKey = orderedBinary.writeKey;
|
|
store.readKey = orderedBinary.readKey;
|
|
}
|
|
}
|
|
|
|
let saveBuffer, saveDataView = { setFloat64() {}, setUint32() {} }, saveDataAddress;
|
|
let savePosition$1 = 8000;
|
|
let DYNAMIC_KEY_BUFFER_SIZE$1 = 8192;
|
|
function allocateSaveBuffer() {
|
|
saveBuffer = typeof Buffer != 'undefined' ? Buffer.alloc(DYNAMIC_KEY_BUFFER_SIZE$1) : new Uint8Array(DYNAMIC_KEY_BUFFER_SIZE$1);
|
|
saveBuffer.buffer.address = getAddress(saveBuffer.buffer);
|
|
saveDataAddress = saveBuffer.buffer.address;
|
|
// TODO: Conditionally only do this for key sequences?
|
|
saveDataView.setUint32(savePosition$1, 0xffffffff);
|
|
saveDataView.setFloat64(savePosition$1 + 4, saveDataAddress, true); // save a pointer from the old buffer to the new address for the sake of the prefetch sequences
|
|
saveDataView = saveBuffer.dataView || (saveBuffer.dataView = new DataView(saveBuffer.buffer, saveBuffer.byteOffset, saveBuffer.byteLength));
|
|
savePosition$1 = 0;
|
|
}
|
|
function saveKey(key, writeKey, saveTo, maxKeySize, flags) {
|
|
if (savePosition$1 > 7800) {
|
|
allocateSaveBuffer();
|
|
}
|
|
let start = savePosition$1;
|
|
try {
|
|
savePosition$1 = key === undefined ? start + 4 :
|
|
writeKey(key, saveBuffer, start + 4);
|
|
} catch (error) {
|
|
saveBuffer.fill(0, start + 4); // restore zeros
|
|
if (error.name == 'RangeError') {
|
|
if (8180 - start < maxKeySize) {
|
|
allocateSaveBuffer(); // try again:
|
|
return saveKey(key, writeKey, saveTo, maxKeySize);
|
|
}
|
|
throw new Error('Key was too large, max key size is ' + maxKeySize);
|
|
} else
|
|
throw error;
|
|
}
|
|
let length = savePosition$1 - start - 4;
|
|
if (length > maxKeySize) {
|
|
throw new Error('Key of size ' + length + ' was too large, max key size is ' + maxKeySize);
|
|
}
|
|
if (savePosition$1 >= 8160) { // need to reserve enough room at the end for pointers
|
|
savePosition$1 = start; // reset position
|
|
allocateSaveBuffer(); // try again:
|
|
return saveKey(key, writeKey, saveTo, maxKeySize);
|
|
}
|
|
if (saveTo) {
|
|
saveDataView.setUint32(start, flags ? length | flags : length, true); // save the length
|
|
saveTo.saveBuffer = saveBuffer;
|
|
savePosition$1 = (savePosition$1 + 12) & 0xfffffc;
|
|
return start + saveDataAddress;
|
|
} else {
|
|
saveBuffer.start = start + 4;
|
|
saveBuffer.end = savePosition$1;
|
|
savePosition$1 = (savePosition$1 + 7) & 0xfffff8; // full 64-bit word alignment since these are usually copied
|
|
return saveBuffer;
|
|
}
|
|
}
|
|
|
|
const IF_EXISTS = 3.542694326329068e-103;
|
|
const ITERATOR_DONE = { done: true, value: undefined };
|
|
const Uint8ArraySlice = Uint8Array.prototype.slice;
|
|
let getValueBytes = globalBuffer;
|
|
if (!getValueBytes.maxLength) {
|
|
getValueBytes.maxLength = getValueBytes.length;
|
|
getValueBytes.isGlobal = true;
|
|
Object.defineProperty(getValueBytes, 'length', { value: getValueBytes.length, writable: true, configurable: true });
|
|
}
|
|
const START_ADDRESS_POSITION = 4064;
|
|
const NEW_BUFFER_THRESHOLD = 0x8000;
|
|
const SOURCE_SYMBOL = Symbol.for('source');
|
|
const UNMODIFIED = {};
|
|
let mmaps = [];
|
|
|
|
function addReadMethods(LMDBStore, {
|
|
maxKeySize, env, keyBytes, keyBytesView, getLastVersion, getLastTxnId
|
|
}) {
|
|
let readTxn, readTxnRenewed, asSafeBuffer = false;
|
|
let renewId = 1;
|
|
let outstandingReads = 0;
|
|
Object.assign(LMDBStore.prototype, {
|
|
getString(id, options) {
|
|
let txn = env.writeTxn || (options && options.transaction) || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
let string = getStringByBinary(this.dbAddress, this.writeKey(id, keyBytes, 0), txn.address || 0);
|
|
if (typeof string === 'number') { // indicates the buffer wasn't large enough
|
|
this._allocateGetBuffer(string);
|
|
// and then try again
|
|
string = getStringByBinary(this.dbAddress, this.writeKey(id, keyBytes, 0), txn.address || 0);
|
|
}
|
|
if (string)
|
|
this.lastSize = string.length;
|
|
return string;
|
|
},
|
|
getBinaryFast(id, options) {
|
|
let rc;
|
|
let txn = env.writeTxn || (options && options.transaction) || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
rc = this.lastSize = getByBinary(this.dbAddress, this.writeKey(id, keyBytes, 0), (options && options.ifNotTxnId) || 0, txn.address || 0);
|
|
if (rc < 0) {
|
|
if (rc == -30798) // MDB_NOTFOUND
|
|
return; // undefined
|
|
if (rc == -30004) // txn id matched
|
|
return UNMODIFIED;
|
|
if (rc == -30781 /*MDB_BAD_VALSIZE*/ && this.writeKey(id, keyBytes, 0) == 0)
|
|
throw new Error(id === undefined ?
|
|
'A key is required for get, but is undefined' :
|
|
'Zero length key is not allowed in LMDB');
|
|
if (rc == -30000) // int32 overflow, read uint32
|
|
rc = this.lastSize = keyBytesView.getUint32(0, true);
|
|
else if (rc == -30001) {// shared buffer
|
|
this.lastSize = keyBytesView.getUint32(0, true);
|
|
let bufferId = keyBytesView.getUint32(4, true);
|
|
return getMMapBuffer(bufferId, this.lastSize);
|
|
} else
|
|
throw lmdbError(rc);
|
|
}
|
|
let compression = this.compression;
|
|
let bytes = compression ? compression.getValueBytes : getValueBytes;
|
|
if (rc > bytes.maxLength) {
|
|
// this means the target buffer wasn't big enough, so the get failed to copy all the data from the database, need to either grow or use special buffer
|
|
return this._returnLargeBuffer(
|
|
() => getByBinary(this.dbAddress, this.writeKey(id, keyBytes, 0), 0, txn.address || 0));
|
|
}
|
|
bytes.length = this.lastSize;
|
|
return bytes;
|
|
},
|
|
getBFAsync(id, options, callback) {
|
|
let txn = env.writeTxn || (options && options.transaction) || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
txn.refCount = (txn.refCount || 0) + 1;
|
|
outstandingReads++;
|
|
let address = recordReadInstruction(txn.address, this.db.dbi, id, this.writeKey, maxKeySize, ( rc, bufferId, offset, size ) => {
|
|
if (rc && rc !== 1)
|
|
callback(lmdbError(rc));
|
|
outstandingReads--;
|
|
let buffer = mmaps[bufferId];
|
|
if (!buffer) {
|
|
buffer = mmaps[bufferId] = getSharedBuffer(bufferId, env.address);
|
|
}
|
|
//console.log({bufferId, offset, size})
|
|
if (buffer.isSharedMap) {
|
|
// using LMDB shared memory
|
|
// TODO: We may want explicit support for clearing aborting the transaction on the next event turn,
|
|
// but for now we are relying on the GC to cleanup transaction for larger blocks of memory
|
|
let bytes = new Uint8Array(buffer, offset, size);
|
|
bytes.txn = txn;
|
|
callback(bytes, 0, size);
|
|
} else {
|
|
// using copied memory
|
|
txn.done(); // decrement and possibly abort
|
|
callback(buffer, offset, size);
|
|
}
|
|
});
|
|
if (address) {
|
|
startRead(address, () => {
|
|
resolveReads();
|
|
});
|
|
}
|
|
},
|
|
getAsync(id, options, callback) {
|
|
let promise;
|
|
if (!callback)
|
|
promise = new Promise(resolve => callback = resolve);
|
|
this.getBFAsync(id, options, (buffer, offset, size) => {
|
|
if (this.useVersions) {
|
|
// TODO: And get the version
|
|
offset += 8;
|
|
size -= 8;
|
|
}
|
|
let bytes = new Uint8Array(buffer, offset, size);
|
|
let value;
|
|
if (this.decoder) {
|
|
// the decoder potentially uses the data from the buffer in the future and needs a stable buffer
|
|
value = bytes && this.decoder.decode(bytes);
|
|
} else if (this.encoding == 'binary') {
|
|
value = bytes;
|
|
} else {
|
|
value = Buffer.prototype.utf8Slice.call(bytes, 0, size);
|
|
if (this.encoding == 'json' && value)
|
|
value = JSON.parse(value);
|
|
}
|
|
callback(value);
|
|
});
|
|
return promise;
|
|
},
|
|
retain(data, options) {
|
|
if (!data)
|
|
return
|
|
let source = data[SOURCE_SYMBOL];
|
|
let buffer = source ? source.bytes : data;
|
|
if (!buffer.isGlobal && !env.writeTxn) {
|
|
let txn = options?.transaction || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
buffer.txn = txn;
|
|
txn.refCount = (txn.refCount || 0) + 1;
|
|
return data;
|
|
} else {
|
|
buffer = Uint8ArraySlice.call(buffer, 0, this.lastSize);
|
|
if (source) {
|
|
source.bytes = buffer;
|
|
return data;
|
|
} else
|
|
return buffer;
|
|
}
|
|
},
|
|
_returnLargeBuffer(getFast) {
|
|
let bytes;
|
|
let compression = this.compression;
|
|
if (asSafeBuffer && this.lastSize > NEW_BUFFER_THRESHOLD) {
|
|
// used by getBinary to indicate it should create a dedicated buffer to receive this
|
|
let bytesToRestore;
|
|
try {
|
|
if (compression) {
|
|
bytesToRestore = compression.getValueBytes;
|
|
let dictionary = compression.dictionary || [];
|
|
let dictLength = (dictionary.length >> 3) << 3;// make sure it is word-aligned
|
|
bytes = makeReusableBuffer(this.lastSize);
|
|
compression.setBuffer(bytes.buffer, bytes.byteOffset, this.lastSize, dictionary, dictLength);
|
|
compression.getValueBytes = bytes;
|
|
} else {
|
|
bytesToRestore = getValueBytes;
|
|
setGlobalBuffer(bytes = getValueBytes = makeReusableBuffer(this.lastSize));
|
|
}
|
|
getFast();
|
|
} finally {
|
|
if (compression) {
|
|
let dictLength = (compression.dictionary.length >> 3) << 3;
|
|
compression.setBuffer(bytesToRestore.buffer, bytesToRestore.byteOffset, bytesToRestore.maxLength, compression.dictionary, dictLength);
|
|
compression.getValueBytes = bytesToRestore;
|
|
} else {
|
|
setGlobalBuffer(bytesToRestore);
|
|
getValueBytes = bytesToRestore;
|
|
}
|
|
}
|
|
return bytes;
|
|
}
|
|
// grow our shared/static buffer to accomodate the size of the data
|
|
bytes = this._allocateGetBuffer(this.lastSize);
|
|
// and try again
|
|
getFast();
|
|
bytes.length = this.lastSize;
|
|
return bytes;
|
|
},
|
|
_allocateGetBuffer(lastSize) {
|
|
let newLength = Math.min(Math.max(lastSize * 2, 0x1000), 0xfffffff8);
|
|
let bytes;
|
|
if (this.compression) {
|
|
let dictionary = this.compression.dictionary || Buffer.allocUnsafeSlow(0);
|
|
let dictLength = (dictionary.length >> 3) << 3;// make sure it is word-aligned
|
|
bytes = Buffer.allocUnsafeSlow(newLength + dictLength);
|
|
bytes.set(dictionary); // copy dictionary into start
|
|
// the section after the dictionary is the target area for get values
|
|
bytes = bytes.subarray(dictLength);
|
|
this.compression.setBuffer(bytes.buffer, bytes.byteOffset, newLength, dictionary, dictLength);
|
|
bytes.maxLength = newLength;
|
|
Object.defineProperty(bytes, 'length', { value: newLength, writable: true, configurable: true });
|
|
this.compression.getValueBytes = bytes;
|
|
} else {
|
|
bytes = makeReusableBuffer(newLength);
|
|
setGlobalBuffer(getValueBytes = bytes);
|
|
}
|
|
bytes.isGlobal = true;
|
|
return bytes;
|
|
},
|
|
getBinary(id, options) {
|
|
try {
|
|
asSafeBuffer = true;
|
|
let fastBuffer = this.getBinaryFast(id, options);
|
|
return fastBuffer && (fastBuffer.isGlobal ? Uint8ArraySlice.call(fastBuffer, 0, this.lastSize) : fastBuffer);
|
|
} finally {
|
|
asSafeBuffer = false;
|
|
}
|
|
},
|
|
getSharedBinary(id, options) {
|
|
let fastBuffer = this.getBinaryFast(id, options);
|
|
if (fastBuffer) {
|
|
if (fastBuffer.isGlobal || writeTxn)
|
|
return Uint8ArraySlice.call(fastBuffer, 0, this.lastSize)
|
|
fastBuffer.txn = (options && options.transaction);
|
|
options.transaction.refCount = (options.transaction.refCount || 0) + 1;
|
|
return fastBuffer;
|
|
}
|
|
},
|
|
get(id, options) {
|
|
if (this.decoderCopies) {
|
|
// the decoder copies any data, so we can use the fast binary retrieval that overwrites the same buffer space
|
|
let bytes = this.getBinaryFast(id, options);
|
|
return bytes && (bytes == UNMODIFIED ? UNMODIFIED : this.decoder.decode(bytes, options));
|
|
}
|
|
if (this.encoding == 'binary')
|
|
return this.getBinary(id, options);
|
|
if (this.decoder) {
|
|
// the decoder potentially uses the data from the buffer in the future and needs a stable buffer
|
|
let bytes = this.getBinary(id, options);
|
|
return bytes && (bytes == UNMODIFIED ? UNMODIFIED : this.decoder.decode(bytes));
|
|
}
|
|
|
|
let result = this.getString(id, options);
|
|
if (result) {
|
|
if (this.encoding == 'json')
|
|
return JSON.parse(result);
|
|
}
|
|
return result;
|
|
},
|
|
getEntry(id, options) {
|
|
let value = this.get(id, options);
|
|
if (value !== undefined) {
|
|
if (this.useVersions)
|
|
return {
|
|
value,
|
|
version: getLastVersion(),
|
|
//size: this.lastSize
|
|
};
|
|
else
|
|
return {
|
|
value,
|
|
//size: this.lastSize
|
|
};
|
|
}
|
|
},
|
|
resetReadTxn() {
|
|
resetReadTxn();
|
|
},
|
|
_commitReadTxn() {
|
|
if (readTxn) {
|
|
readTxn.isCommitted = true;
|
|
readTxn.commit();
|
|
}
|
|
lastReadTxnRef = null;
|
|
readTxnRenewed = null;
|
|
readTxn = null;
|
|
},
|
|
ensureReadTxn() {
|
|
if (!env.writeTxn && !readTxnRenewed)
|
|
renewReadTxn(this);
|
|
},
|
|
doesExist(key, versionOrValue) {
|
|
if (versionOrValue == null) {
|
|
// undefined means the entry exists, null is used specifically to check for the entry *not* existing
|
|
return (this.getBinaryFast(key) === undefined) == (versionOrValue === null);
|
|
}
|
|
else if (this.useVersions) {
|
|
return this.getBinaryFast(key) !== undefined && (versionOrValue === IF_EXISTS || getLastVersion() === versionOrValue);
|
|
}
|
|
else {
|
|
if (versionOrValue && versionOrValue['\x10binary-data\x02'])
|
|
versionOrValue = versionOrValue['\x10binary-data\x02'];
|
|
else if (this.encoder)
|
|
versionOrValue = this.encoder.encode(versionOrValue);
|
|
if (typeof versionOrValue == 'string')
|
|
versionOrValue = Buffer.from(versionOrValue);
|
|
return this.getValuesCount(key, { start: versionOrValue, exactMatch: true}) > 0;
|
|
}
|
|
},
|
|
getValues(key, options) {
|
|
let defaultOptions = {
|
|
key,
|
|
valuesForKey: true
|
|
};
|
|
if (options && options.snapshot === false)
|
|
throw new Error('Can not disable snapshots for getValues');
|
|
return this.getRange(options ? Object.assign(defaultOptions, options) : defaultOptions);
|
|
},
|
|
getKeys(options) {
|
|
if (!options)
|
|
options = {};
|
|
options.values = false;
|
|
return this.getRange(options);
|
|
},
|
|
getCount(options) {
|
|
if (!options)
|
|
options = {};
|
|
options.onlyCount = true;
|
|
return this.getRange(options).iterate();
|
|
},
|
|
getKeysCount(options) {
|
|
if (!options)
|
|
options = {};
|
|
options.onlyCount = true;
|
|
options.values = false;
|
|
return this.getRange(options).iterate();
|
|
},
|
|
getValuesCount(key, options) {
|
|
if (!options)
|
|
options = {};
|
|
options.key = key;
|
|
options.valuesForKey = true;
|
|
options.onlyCount = true;
|
|
return this.getRange(options).iterate();
|
|
},
|
|
getRange(options) {
|
|
let iterable = new RangeIterable();
|
|
if (!options)
|
|
options = {};
|
|
let includeValues = options.values !== false;
|
|
let includeVersions = options.versions;
|
|
let valuesForKey = options.valuesForKey;
|
|
let limit = options.limit;
|
|
let db = this.db;
|
|
let snapshot = options.snapshot;
|
|
let compression = this.compression;
|
|
iterable.iterate = () => {
|
|
let currentKey = valuesForKey ? options.key : options.start;
|
|
const reverse = options.reverse;
|
|
let count = 0;
|
|
let cursor, cursorRenewId, cursorAddress;
|
|
let txn;
|
|
let flags = (includeValues ? 0x100 : 0) | (reverse ? 0x400 : 0) |
|
|
(valuesForKey ? 0x800 : 0) | (options.exactMatch ? 0x4000 : 0) |
|
|
(options.inclusiveEnd ? 0x8000 : 0) |
|
|
(options.exclusiveStart ? 0x10000 : 0);
|
|
let store = this;
|
|
function resetCursor() {
|
|
try {
|
|
if (cursor)
|
|
finishCursor();
|
|
let txnAddress;
|
|
txn = options.transaction;
|
|
if (txn) {
|
|
if (txn.isDone) throw new Error('Can not iterate on range with transaction that is already' +
|
|
' done');
|
|
txnAddress = txn.address;
|
|
cursor = null;
|
|
} else {
|
|
let writeTxn = env.writeTxn;
|
|
if (writeTxn)
|
|
snapshot = false;
|
|
txn = env.writeTxn || options.transaction || (readTxnRenewed ? readTxn : renewReadTxn(store));
|
|
cursor = !writeTxn && db.availableCursor;
|
|
}
|
|
if (cursor) {
|
|
db.availableCursor = null;
|
|
flags |= 0x2000;
|
|
} else {
|
|
cursor = new Cursor(db, txnAddress || 0);
|
|
}
|
|
cursorAddress = cursor.address;
|
|
txn.refCount = (txn.refCount || 0) + 1; // track transaction so we always use the same one
|
|
if (snapshot === false) {
|
|
cursorRenewId = renewId; // use shared read transaction
|
|
txn.renewingRefCount = (txn.renewingRefCount || 0) + 1; // need to know how many are renewing cursors
|
|
}
|
|
} catch(error) {
|
|
if (cursor) {
|
|
try {
|
|
cursor.close();
|
|
} catch(error) { }
|
|
}
|
|
throw error;
|
|
}
|
|
}
|
|
resetCursor();
|
|
if (options.onlyCount) {
|
|
flags |= 0x1000;
|
|
let count = position$1(options.offset);
|
|
if (count < 0)
|
|
lmdbError(count);
|
|
finishCursor();
|
|
return count;
|
|
}
|
|
function position$1(offset) {
|
|
if (!env.address) {
|
|
throw new Error('Can not iterate on a closed database');
|
|
}
|
|
let keySize = currentKey === undefined ? 0 : store.writeKey(currentKey, keyBytes, 0);
|
|
let endAddress;
|
|
if (valuesForKey) {
|
|
if (options.start === undefined && options.end === undefined)
|
|
endAddress = 0;
|
|
else {
|
|
let startAddress;
|
|
if (store.encoder.writeKey) {
|
|
startAddress = saveKey(options.start, store.encoder.writeKey, iterable, maxKeySize);
|
|
keyBytesView.setFloat64(START_ADDRESS_POSITION, startAddress, true);
|
|
endAddress = saveKey(options.end, store.encoder.writeKey, iterable, maxKeySize);
|
|
} else if ((!options.start || options.start instanceof Uint8Array) && (!options.end || options.end instanceof Uint8Array)) {
|
|
startAddress = saveKey(options.start, orderedBinary.writeKey, iterable, maxKeySize);
|
|
keyBytesView.setFloat64(START_ADDRESS_POSITION, startAddress, true);
|
|
endAddress = saveKey(options.end, orderedBinary.writeKey, iterable, maxKeySize);
|
|
} else {
|
|
throw new Error('Only key-based encoding is supported for start/end values');
|
|
}
|
|
}
|
|
} else
|
|
endAddress = saveKey(options.end, store.writeKey, iterable, maxKeySize);
|
|
return position(cursorAddress, flags, offset || 0, keySize, endAddress);
|
|
}
|
|
|
|
function finishCursor() {
|
|
if (txn.isDone)
|
|
return;
|
|
if (iterable.onDone)
|
|
iterable.onDone();
|
|
if (cursorRenewId)
|
|
txn.renewingRefCount--;
|
|
if (--txn.refCount <= 0 && txn.notCurrent) {
|
|
cursor.close();
|
|
txn.abort(); // this is no longer main read txn, abort it now that we are done
|
|
txn.isDone = true;
|
|
} else {
|
|
if (db.availableCursor || txn != readTxn) {
|
|
cursor.close();
|
|
} else { // try to reuse it
|
|
db.availableCursor = cursor;
|
|
db.cursorTxn = txn;
|
|
}
|
|
}
|
|
}
|
|
return {
|
|
next() {
|
|
let keySize, lastSize;
|
|
if (cursorRenewId && (cursorRenewId != renewId || txn.isDone)) {
|
|
resetCursor();
|
|
keySize = position$1(0);
|
|
}
|
|
if (count === 0) { // && includeValues) // on first entry, get current value if we need to
|
|
keySize = position$1(options.offset);
|
|
} else
|
|
keySize = iterate(cursorAddress);
|
|
if (keySize <= 0 ||
|
|
(count++ >= limit)) {
|
|
if (count < 0)
|
|
lmdbError(count);
|
|
finishCursor();
|
|
return ITERATOR_DONE;
|
|
}
|
|
if (!valuesForKey || snapshot === false) {
|
|
if (keySize > 20000) {
|
|
if (keySize > 0x1000000)
|
|
lmdbError(keySize - 0x100000000);
|
|
throw new Error('Invalid key size ' + keySize.toString(16))
|
|
}
|
|
currentKey = store.readKey(keyBytes, 32, keySize + 32);
|
|
}
|
|
if (includeValues) {
|
|
let value;
|
|
lastSize = keyBytesView.getUint32(0, true);
|
|
let bufferId = keyBytesView.getUint32(4, true);
|
|
let bytes;
|
|
if (bufferId) {
|
|
bytes = getMMapBuffer(bufferId, lastSize);
|
|
} else {
|
|
bytes = compression ? compression.getValueBytes : getValueBytes;
|
|
if (lastSize > bytes.maxLength) {
|
|
store.lastSize = lastSize;
|
|
asSafeBuffer = store.encoding == 'binary';
|
|
try {
|
|
bytes = store._returnLargeBuffer(() => getCurrentValue(cursorAddress));
|
|
} finally {
|
|
asSafeBuffer = false;
|
|
}
|
|
} else
|
|
bytes.length = lastSize;
|
|
}
|
|
if (store.decoder) {
|
|
value = store.decoder.decode(bytes, lastSize);
|
|
} else if (store.encoding == 'binary')
|
|
value = bytes.isGlobal ? Uint8ArraySlice.call(bytes, 0, lastSize) : bytes;
|
|
else {
|
|
value = bytes.toString('utf8', 0, lastSize);
|
|
if (store.encoding == 'json' && value)
|
|
value = JSON.parse(value);
|
|
}
|
|
if (includeVersions)
|
|
return {
|
|
value: {
|
|
key: currentKey,
|
|
value,
|
|
version: getLastVersion()
|
|
}
|
|
};
|
|
else if (valuesForKey)
|
|
return {
|
|
value
|
|
};
|
|
else
|
|
return {
|
|
value: {
|
|
key: currentKey,
|
|
value,
|
|
}
|
|
};
|
|
} else if (includeVersions) {
|
|
return {
|
|
value: {
|
|
key: currentKey,
|
|
version: getLastVersion()
|
|
}
|
|
};
|
|
} else {
|
|
return {
|
|
value: currentKey
|
|
};
|
|
}
|
|
},
|
|
return() {
|
|
finishCursor();
|
|
return ITERATOR_DONE;
|
|
},
|
|
throw() {
|
|
finishCursor();
|
|
return ITERATOR_DONE;
|
|
}
|
|
};
|
|
};
|
|
return iterable;
|
|
},
|
|
|
|
getMany(keys, callback) {
|
|
// this is an asynchronous get for multiple keys. It actually works by prefetching asynchronously,
|
|
// allowing a separate to absorb the potentially largest cost: hard page faults (and disk I/O).
|
|
// And then we just do standard sync gets (to deserialized data) to fulfil the callback/promise
|
|
// once the prefetch occurs
|
|
let promise = callback ? undefined : new Promise(resolve => callback = (error, results) => resolve(results));
|
|
this.prefetch(keys, () => {
|
|
let results = new Array(keys.length);
|
|
for (let i = 0, l = keys.length; i < l; i++) {
|
|
results[i] = get.call(this, keys[i]);
|
|
}
|
|
callback(null, results);
|
|
});
|
|
return promise;
|
|
},
|
|
getSharedBufferForGet(id, options) {
|
|
let txn = env.writeTxn || (options && options.transaction) || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
this.lastSize = this.keyIsCompatibility ? txn.getBinaryShared(id) : this.db.get(this.writeKey(id, keyBytes, 0));
|
|
if (this.lastSize === -30798) { // not found code
|
|
return; //undefined
|
|
}
|
|
return this.lastSize;
|
|
},
|
|
prefetch(keys, callback) {
|
|
if (!keys)
|
|
throw new Error('An array of keys must be provided');
|
|
if (!keys.length) {
|
|
if (callback) {
|
|
callback(null);
|
|
return;
|
|
} else
|
|
return Promise.resolve();
|
|
}
|
|
let buffers = [];
|
|
let startPosition;
|
|
let bufferHolder = {};
|
|
let lastBuffer;
|
|
for (let key of keys) {
|
|
let position;
|
|
if (key && key.key !== undefined && key.value !== undefined) {
|
|
position = saveKey(key.value, this.writeKey, bufferHolder, maxKeySize, 0x80000000);
|
|
saveKey(key.key, this.writeKey, bufferHolder, maxKeySize);
|
|
} else {
|
|
position = saveKey(key, this.writeKey, bufferHolder, maxKeySize);
|
|
}
|
|
if (!startPosition)
|
|
startPosition = position;
|
|
if (bufferHolder.saveBuffer != lastBuffer) {
|
|
buffers.push(bufferHolder);
|
|
lastBuffer = bufferHolder.saveBuffer;
|
|
bufferHolder = { saveBuffer: lastBuffer };
|
|
}
|
|
}
|
|
saveKey(undefined, this.writeKey, bufferHolder, maxKeySize);
|
|
outstandingReads++;
|
|
prefetch(this.dbAddress, startPosition, (error) => {
|
|
outstandingReads--;
|
|
if (error)
|
|
console.error('Error with prefetch', buffers, bufferHolder); // partly exists to keep the buffers pinned in memory
|
|
else
|
|
callback(null);
|
|
});
|
|
if (!callback)
|
|
return new Promise(resolve => callback = resolve);
|
|
},
|
|
useReadTransaction() {
|
|
let txn = readTxnRenewed ? readTxn : renewReadTxn(this);
|
|
if (!txn.use) {
|
|
throw new Error('Can not use read transaction from a closed database');
|
|
}
|
|
txn.use();
|
|
return txn;
|
|
},
|
|
close(callback) {
|
|
this.status = 'closing';
|
|
let txnPromise;
|
|
if (this.isRoot) {
|
|
// if it is root, we need to abort and/or wait for transactions to finish
|
|
if (readTxn) readTxn.abort();
|
|
else readTxn = {};
|
|
readTxn.isDone = true;
|
|
Object.defineProperty(readTxn,'renew', {
|
|
value: () => {
|
|
throw new Error('Can not read from a closed database');
|
|
}, configurable: true
|
|
});
|
|
Object.defineProperty(readTxn,'use', {
|
|
value: () => {
|
|
throw new Error('Can not read from a closed database');
|
|
}, configurable: true
|
|
});
|
|
readTxnRenewed = null;
|
|
txnPromise = this._endWrites && this._endWrites();
|
|
}
|
|
const doClose = () => {
|
|
if (this.isRoot) {
|
|
if (outstandingReads > 0) {
|
|
return new Promise(resolve => setTimeout(() => resolve(doClose()), 1));
|
|
}
|
|
env.address = 0;
|
|
env.close();
|
|
} else
|
|
this.db.close();
|
|
this.status = 'closed';
|
|
if (callback)
|
|
callback();
|
|
};
|
|
if (txnPromise)
|
|
return txnPromise.then(doClose);
|
|
else {
|
|
doClose();
|
|
return Promise.resolve();
|
|
}
|
|
},
|
|
getStats() {
|
|
env.writeTxn || (readTxnRenewed ? readTxn : renewReadTxn(this));
|
|
let dbStats = this.db.stat();
|
|
dbStats.root = env.stat();
|
|
Object.assign(dbStats, env.info());
|
|
dbStats.free = env.freeStat();
|
|
return dbStats;
|
|
},
|
|
});
|
|
let get = LMDBStore.prototype.get;
|
|
let lastReadTxnRef;
|
|
function getMMapBuffer(bufferId, size) {
|
|
let buffer = mmaps[bufferId];
|
|
if (!buffer) {
|
|
buffer = mmaps[bufferId] = getSharedBuffer(bufferId, env.address);
|
|
}
|
|
let offset = keyBytesView.getUint32(8, true);
|
|
return new Uint8Array(buffer, offset, size);
|
|
}
|
|
function renewReadTxn(store) {
|
|
if (!env.address) {
|
|
throw new Error('Can not renew a transaction from a closed database');
|
|
}
|
|
if (!readTxn) {
|
|
let retries = 0;
|
|
let waitArray;
|
|
do {
|
|
try {
|
|
let lastReadTxn = lastReadTxnRef && lastReadTxnRef.deref();
|
|
readTxn = new Txn(env, 0x20000, lastReadTxn && !lastReadTxn.isDone && lastReadTxn);
|
|
if (readTxn.address == 0) {
|
|
readTxn = lastReadTxn;
|
|
if (readTxn.notCurrent)
|
|
readTxn.notCurrent = false;
|
|
}
|
|
break;
|
|
} catch (error) {
|
|
if (error.message.includes('temporarily')) {
|
|
if (!waitArray)
|
|
waitArray = new Int32Array(new SharedArrayBuffer(4), 0, 1);
|
|
Atomics.wait(waitArray, 0, 0, retries * 2);
|
|
} else
|
|
throw error;
|
|
}
|
|
} while (retries++ < 100);
|
|
}
|
|
// we actually don't renew here, we let the renew take place in the next
|
|
// lmdb native read/call so as to avoid an extra native call
|
|
readTxnRenewed = setTimeout(resetReadTxn, 0);
|
|
store.emit('begin-transaction');
|
|
return readTxn;
|
|
}
|
|
function resetReadTxn() {
|
|
renewId++;
|
|
if (readTxnRenewed) {
|
|
readTxnRenewed = null;
|
|
if (readTxn.refCount - (readTxn.renewingRefCount || 0) > 0) {
|
|
readTxn.notCurrent = true;
|
|
lastReadTxnRef = new WeakRef(readTxn);
|
|
readTxn = null;
|
|
} else if (readTxn.address && !readTxn.isDone) {
|
|
resetTxn(readTxn.address);
|
|
} else {
|
|
console.warn('Attempt to reset an invalid read txn', readTxn);
|
|
throw new Error('Attempt to reset an invalid read txn');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
function makeReusableBuffer(size) {
|
|
let bytes = typeof Buffer != 'undefined' ? Buffer.alloc(size) : new Uint8Array(size);
|
|
bytes.maxLength = size;
|
|
Object.defineProperty(bytes, 'length', { value: size, writable: true, configurable: true });
|
|
return bytes;
|
|
}
|
|
|
|
Txn.prototype.done = function() {
|
|
this.refCount--;
|
|
if (this.refCount === 0 && this.notCurrent) {
|
|
this.abort();
|
|
this.isDone = true;
|
|
}
|
|
};
|
|
Txn.prototype.use = function() {
|
|
this.refCount = (this.refCount || 0) + 1;
|
|
};
|
|
|
|
|
|
let readInstructions, readCallbacks = new Map(), uint32Instructions, instructionsDataView = { setFloat64() {}, setUint32() {} }, instructionsAddress;
|
|
let savePosition = 8000;
|
|
let DYNAMIC_KEY_BUFFER_SIZE = 8192;
|
|
function allocateInstructionsBuffer() {
|
|
readInstructions = typeof Buffer != 'undefined' ? Buffer.alloc(DYNAMIC_KEY_BUFFER_SIZE) : new Uint8Array(DYNAMIC_KEY_BUFFER_SIZE);
|
|
uint32Instructions = new Int32Array(readInstructions.buffer, 0, readInstructions.buffer.byteLength >> 2);
|
|
uint32Instructions[2] = 0xf0000000; // indicates a new read task must be started
|
|
instructionsAddress = readInstructions.buffer.address = getAddress(readInstructions.buffer);
|
|
readInstructions.dataView = instructionsDataView = new DataView(readInstructions.buffer, readInstructions.byteOffset, readInstructions.byteLength);
|
|
savePosition = 0;
|
|
}
|
|
function recordReadInstruction(txnAddress, dbi, key, writeKey, maxKeySize, callback) {
|
|
if (savePosition > 7800) {
|
|
allocateInstructionsBuffer();
|
|
}
|
|
let start = savePosition;
|
|
let keyPosition = savePosition + 16;
|
|
try {
|
|
savePosition = key === undefined ? keyPosition :
|
|
writeKey(key, readInstructions, keyPosition);
|
|
} catch (error) {
|
|
if (error.name == 'RangeError') {
|
|
if (8180 - start < maxKeySize) {
|
|
allocateInstructionsBuffer(); // try again:
|
|
return recordReadInstruction(txnAddress, dbi, key, writeKey, maxKeySize, callback);
|
|
}
|
|
throw new Error('Key was too large, max key size is ' + maxKeySize);
|
|
} else
|
|
throw error;
|
|
}
|
|
let length = savePosition - keyPosition;
|
|
if (length > maxKeySize) {
|
|
savePosition = start;
|
|
throw new Error('Key of size ' + length + ' was too large, max key size is ' + maxKeySize);
|
|
}
|
|
uint32Instructions[(start >> 2) + 3] = length; // save the length
|
|
uint32Instructions[(start >> 2) + 2] = dbi;
|
|
savePosition = (savePosition + 12) & 0xfffffc;
|
|
instructionsDataView.setFloat64(start, txnAddress, true);
|
|
let callbackId = addReadCallback(() => {
|
|
let position = start >> 2;
|
|
let rc = thisInstructions[position];
|
|
callback(rc, thisInstructions[position + 1], thisInstructions[position + 2], thisInstructions[position + 3]);
|
|
});
|
|
let thisInstructions = uint32Instructions;
|
|
//if (start === 0)
|
|
return startRead(instructionsAddress + start, callbackId, {}, 'read');
|
|
//else
|
|
//nextRead(start);
|
|
}
|
|
let nextCallbackId = 0;
|
|
let addReadCallback = globalThis.__lmdb_read_callback;
|
|
if (!addReadCallback) {
|
|
addReadCallback = globalThis.__lmdb_read_callback = function(callback) {
|
|
let callbackId = nextCallbackId++;
|
|
readCallbacks.set(callbackId, callback);
|
|
return callbackId;
|
|
};
|
|
setReadCallback(function(callbackId) {
|
|
readCallbacks.get(callbackId)();
|
|
readCallbacks.delete(callbackId);
|
|
});
|
|
}
|
|
|
|
let getLastVersion$1, getLastTxnId$1;
|
|
const mapGet = Map.prototype.get;
|
|
const CachingStore = (Store, env) => {
|
|
let childTxnChanges;
|
|
return class LMDBStore extends Store {
|
|
constructor(dbName, options) {
|
|
super(dbName, options);
|
|
if (!env.cacheCommitter) {
|
|
env.cacheCommitter = true;
|
|
this.on('aftercommit', ({ next, last, txnId }) => {
|
|
do {
|
|
let meta = next.meta;
|
|
let store = meta && meta.store;
|
|
if (store) {
|
|
if (next.flag & FAILED_CONDITION)
|
|
store.cache.delete(meta.key); // just delete it from the map
|
|
else {
|
|
let expirationPriority = meta.valueSize >> 10;
|
|
let cache = store.cache;
|
|
let entry = mapGet.call(cache, meta.key);
|
|
if (entry) {
|
|
entry.txnId = txnId;
|
|
cache.used(entry, expirationPriority + 4); // this will enter it into the LRFU (with a little lower priority than a read)
|
|
}
|
|
}
|
|
}
|
|
} while (next != last && (next = next.next))
|
|
});
|
|
}
|
|
this.db.cachingDb = this;
|
|
if (options.cache.clearKeptInterval)
|
|
options.cache.clearKeptObjects = exports.clearKeptObjects;
|
|
this.cache = new WeakLRUCache(options.cache);
|
|
if (options.cache.validated)
|
|
this.cache.validated = true;
|
|
}
|
|
get isCaching() {
|
|
return true
|
|
}
|
|
get(id, options) {
|
|
let value;
|
|
if (this.cache.validated) {
|
|
let entry = this.cache.get(id);
|
|
if (entry) {
|
|
let cachedValue = entry.value;
|
|
if (entry.txnId != null) {
|
|
value = super.get(id, { ifNotTxnId: entry.txnId, transaction: options && options.transaction });
|
|
if (value === UNMODIFIED)
|
|
return cachedValue;
|
|
} else // with no txn id we do not validate; this is the state of a cached value after a write before it transacts
|
|
return cachedValue;
|
|
} else
|
|
value = super.get(id, options);
|
|
} else if (options && options.transaction) {
|
|
return super.get(id, options);
|
|
} else {
|
|
value = this.cache.getValue(id);
|
|
if (value !== undefined) {
|
|
return value;
|
|
}
|
|
value = super.get(id);
|
|
}
|
|
if (value && typeof value === 'object' && !options && typeof id !== 'object') {
|
|
let entry = this.cache.setValue(id, value, this.lastSize >> 10);
|
|
if (this.useVersions) {
|
|
entry.version = getLastVersion$1();
|
|
}
|
|
if (this.cache.validated)
|
|
entry.txnId = getLastTxnId$1();
|
|
}
|
|
return value;
|
|
}
|
|
getEntry(id, options) {
|
|
let entry, value;
|
|
if (this.cache.validated) {
|
|
entry = this.cache.get(id);
|
|
if (entry) {
|
|
if (entry.txnId != null) {
|
|
value = super.get(id, { ifNotTxnId: entry.txnId, transaction: options && options.transaction });
|
|
if (value === UNMODIFIED)
|
|
return entry;
|
|
} else // with no txn id we do not validate; this is the state of a cached value after a write before it transacts
|
|
return entry;
|
|
} else
|
|
value = super.get(id, options);
|
|
} else if (options && options.transaction) {
|
|
return super.getEntry(id, options);
|
|
} else {
|
|
entry = this.cache.get(id);
|
|
if (entry !== undefined) {
|
|
return entry;
|
|
}
|
|
value = super.get(id);
|
|
}
|
|
if (value === undefined)
|
|
return;
|
|
if (value && typeof value === 'object' && !options && typeof id !== 'object') {
|
|
entry = this.cache.setValue(id, value, this.lastSize >> 10);
|
|
} else
|
|
entry = { value };
|
|
if (this.useVersions)
|
|
entry.version = getLastVersion$1();
|
|
if (this.cache.validated)
|
|
entry.txnId = getLastTxnId$1();
|
|
return entry;
|
|
}
|
|
putEntry(id, entry, ifVersion) {
|
|
let result = super.put(id, entry.value, entry.version, ifVersion);
|
|
if (typeof id === 'object')
|
|
return result;
|
|
if (result && result.then)
|
|
this.cache.setManually(id, entry); // set manually so we can keep it pinned in memory until it is committed
|
|
else // sync operation, immediately add to cache
|
|
this.cache.set(id, entry);
|
|
}
|
|
put(id, value, version, ifVersion) {
|
|
let result = super.put(id, value, version, ifVersion);
|
|
if (typeof id !== 'object') {
|
|
if (value && value['\x10binary-data\x02']) {
|
|
// don't cache binary data, since it will be decoded on get
|
|
this.cache.delete(id);
|
|
return result;
|
|
}
|
|
// sync operation, immediately add to cache, otherwise keep it pinned in memory until it is committed
|
|
let entry = this.cache.setValue(id, value, !result || result.isSync ? 0 : -1);
|
|
if (childTxnChanges)
|
|
childTxnChanges.add(id);
|
|
if (version !== undefined)
|
|
entry.version = typeof version === 'object' ? version.version : version;
|
|
}
|
|
return result;
|
|
}
|
|
putSync(id, value, version, ifVersion) {
|
|
if (id !== 'object') {
|
|
// sync operation, immediately add to cache, otherwise keep it pinned in memory until it is committed
|
|
if (value && typeof value === 'object') {
|
|
let entry = this.cache.setValue(id, value);
|
|
if (childTxnChanges)
|
|
childTxnChanges.add(id);
|
|
if (version !== undefined) {
|
|
entry.version = typeof version === 'object' ? version.version : version;
|
|
}
|
|
} else // it is possible that a value used to exist here
|
|
this.cache.delete(id);
|
|
}
|
|
return super.putSync(id, value, version, ifVersion);
|
|
}
|
|
remove(id, ifVersion) {
|
|
this.cache.delete(id);
|
|
return super.remove(id, ifVersion);
|
|
}
|
|
removeSync(id, ifVersion) {
|
|
this.cache.delete(id);
|
|
return super.removeSync(id, ifVersion);
|
|
}
|
|
clearAsync(callback) {
|
|
this.cache.clear();
|
|
return super.clearAsync(callback);
|
|
}
|
|
clearSync() {
|
|
this.cache.clear();
|
|
super.clearSync();
|
|
}
|
|
childTransaction(callback) {
|
|
return super.childTransaction(() => {
|
|
let cache = this.cache;
|
|
let previousChanges = childTxnChanges;
|
|
try {
|
|
childTxnChanges = new Set();
|
|
return when(callback(), (result) => {
|
|
if (result === ABORT)
|
|
return abort();
|
|
childTxnChanges = previousChanges;
|
|
return result;
|
|
}, abort);
|
|
} catch(error) {
|
|
abort(error);
|
|
}
|
|
function abort(error) {
|
|
// if the transaction was aborted, remove all affected entries from cache
|
|
for (let id of childTxnChanges)
|
|
cache.delete(id);
|
|
childTxnChanges = previousChanges;
|
|
if (error)
|
|
throw error;
|
|
else
|
|
return ABORT;
|
|
}
|
|
});
|
|
}
|
|
doesExist(key, versionOrValue) {
|
|
let entry = this.cache.get(key);
|
|
if (entry) {
|
|
if (versionOrValue == null) {
|
|
return versionOrValue !== null;
|
|
} else if (this.useVersions) {
|
|
return versionOrValue === IF_EXISTS$1 || entry.version === versionOrValue;
|
|
}
|
|
}
|
|
return super.doesExist(key, versionOrValue);
|
|
}
|
|
};
|
|
};
|
|
function setGetLastVersion(get, getTxnId) {
|
|
getLastVersion$1 = get;
|
|
getLastTxnId$1 = getTxnId;
|
|
}
|
|
|
|
let moduleRequire = typeof require == 'function' && require;
|
|
function setRequire(require) {
|
|
moduleRequire = require;
|
|
}
|
|
|
|
setGetLastVersion(getLastVersion, getLastTxnId);
|
|
let keyBytes, keyBytesView;
|
|
const { onExit, getEnvsPointer, setEnvsPointer, getEnvFlags, setJSFlags } = nativeAddon;
|
|
if (globalThis.__lmdb_envs__)
|
|
setEnvsPointer(globalThis.__lmdb_envs__);
|
|
else
|
|
globalThis.__lmdb_envs__ = getEnvsPointer();
|
|
|
|
// this is hard coded as an upper limit because it is important assumption of the fixed buffers in writing instructions
|
|
// this corresponds to the max key size for 8KB pages
|
|
const MAX_KEY_SIZE = 4026;
|
|
// this is used as the key size by default because default page size is OS page size, which is usually
|
|
// 4KB (but is 16KB on M-series MacOS), and this keeps a consistent max key size when no page size specified.
|
|
const DEFAULT_MAX_KEY_SIZE = 1978;
|
|
const DEFAULT_COMMIT_DELAY = 0;
|
|
|
|
const allDbs = new Map();
|
|
let defaultCompression;
|
|
let hasRegisteredOnExit;
|
|
function open(path$1, options) {
|
|
if (nativeAddon.open) {
|
|
if (nativeAddon.open !== open) {
|
|
// this is the case when lmdb-js has been opened in both ESM and CJS mode, which means that there are two
|
|
// separate JS modules, but they are both using the same native module.
|
|
getLastVersion = nativeAddon.getLastVersion;
|
|
getLastTxnId = nativeAddon.getLastTxnId;
|
|
setGetLastVersion(getLastVersion, getLastTxnId);
|
|
return nativeAddon.open(path$1, options);
|
|
}
|
|
} else {
|
|
nativeAddon.open = open;
|
|
nativeAddon.getLastVersion = getLastVersion;
|
|
nativeAddon.getLastTxnId = getLastTxnId;
|
|
}
|
|
if (!keyBytes) // TODO: Consolidate get buffer and key buffer (don't think we need both)
|
|
allocateFixedBuffer();
|
|
if (typeof path$1 == 'object' && !options) {
|
|
options = path$1;
|
|
path$1 = options.path;
|
|
}
|
|
options = options || {};
|
|
let noFSAccess = options.noFSAccess; // this can only be configured on open, can't let users change it
|
|
let userOptions = options;
|
|
if (path$1 == null) {
|
|
options = Object.assign({
|
|
deleteOnClose: true,
|
|
noSync: true,
|
|
}, options);
|
|
path$1 = tmpdir() + '/' + Math.floor(Math.random() * 2821109907455).toString(36) + '.mdb';
|
|
} else if (!options)
|
|
options = {};
|
|
let extension = path.extname(path$1);
|
|
let name = path.basename(path$1, extension);
|
|
let is32Bit = arch().endsWith('32');
|
|
let remapChunks = options.remapChunks || options.encryptionKey || (options.mapSize ?
|
|
(is32Bit && options.mapSize > 0x100000000) : // larger than fits in address space, must use dynamic maps
|
|
is32Bit); // without a known map size, we default to being able to handle large data correctly/well*/
|
|
let userMapSize = options.mapSize;
|
|
options = Object.assign({
|
|
noSubdir: Boolean(extension),
|
|
isRoot: true,
|
|
maxDbs: 12,
|
|
remapChunks,
|
|
keyBytes,
|
|
overlappingSync: (options.noSync || options.readOnly) ? false : (os != 'win32'),
|
|
// default map size limit of 4 exabytes when using remapChunks, since it is not preallocated and we can
|
|
// make it super huge.
|
|
mapSize: remapChunks ? 0x10000000000000 :
|
|
0x20000, // Otherwise we start small with 128KB
|
|
safeRestore: process.env.LMDB_RESTORE == 'safe',
|
|
}, options);
|
|
options.path = path$1;
|
|
if (options.asyncTransactionOrder == 'strict') {
|
|
options.strictAsyncOrder = true;
|
|
}
|
|
if (nativeAddon.version.major + nativeAddon.version.minor / 100 + nativeAddon.version.patch / 10000 < 0.0980) {
|
|
options.overlappingSync = false; // not support on older versions
|
|
options.trackMetrics = false;
|
|
options.usePreviousSnapshot = false;
|
|
options.safeRestore = false;
|
|
options.remapChunks = false;
|
|
if (!userMapSize) options.mapSize = 0x40000000; // 1 GB
|
|
}
|
|
|
|
if (!exists(options.noSubdir ? path.dirname(path$1) : path$1))
|
|
fs.mkdirSync(options.noSubdir ? path.dirname(path$1) : path$1, { recursive: true }
|
|
);
|
|
function makeCompression(compressionOptions) {
|
|
if (compressionOptions instanceof Compression)
|
|
return compressionOptions;
|
|
let useDefault = typeof compressionOptions != 'object';
|
|
if (useDefault && defaultCompression)
|
|
return defaultCompression;
|
|
compressionOptions = Object.assign({
|
|
threshold: 1000,
|
|
dictionary: fs.readFileSync(new URL('./dict/dict.txt', (typeof document === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : (document.currentScript && document.currentScript.src || new URL('index.cjs', document.baseURI).href)).replace(/dist[\\\/]index.cjs$/, ''))),
|
|
getValueBytes: makeReusableBuffer(0),
|
|
}, compressionOptions);
|
|
let compression = Object.assign(new Compression(compressionOptions), compressionOptions);
|
|
if (useDefault)
|
|
defaultCompression = compression;
|
|
return compression;
|
|
}
|
|
|
|
if (options.compression)
|
|
options.compression = makeCompression(options.compression);
|
|
let flags =
|
|
(options.overlappingSync ? 0x1000 : 0) |
|
|
(options.noSubdir ? 0x4000 : 0) |
|
|
(options.noSync ? 0x10000 : 0) |
|
|
(options.readOnly ? 0x20000 : 0) |
|
|
(options.noMetaSync ? 0x40000 : 0) |
|
|
(options.useWritemap ? 0x80000 : 0) |
|
|
(options.mapAsync ? 0x100000 : 0) |
|
|
(options.noReadAhead ? 0x800000 : 0) |
|
|
(options.noMemInit ? 0x1000000 : 0) |
|
|
(options.usePreviousSnapshot ? 0x2000000 : 0) |
|
|
(options.remapChunks ? 0x4000000 : 0) |
|
|
(options.safeRestore ? 0x800 : 0) |
|
|
(options.trackMetrics ? 0x400 : 0);
|
|
|
|
let env = new Env();
|
|
let jsFlags = (options.overlappingSync ? 0x1000 : 0) |
|
|
(options.separateFlushed ? 1 : 0) |
|
|
(options.deleteOnClose ? 2 : 0);
|
|
let rc = env.open(options, flags, jsFlags);
|
|
env.path = path$1;
|
|
if (rc)
|
|
lmdbError(rc);
|
|
delete options.keyBytes; // no longer needed, don't copy to stores
|
|
let maxKeySize = env.getMaxKeySize();
|
|
maxKeySize = Math.min(maxKeySize, options.pageSize ? MAX_KEY_SIZE : DEFAULT_MAX_KEY_SIZE);
|
|
flags = getEnvFlags(env.address); // re-retrieve them, they are not necessarily the same if we are connecting to an existing env
|
|
if (flags & 0x1000) {
|
|
if (userOptions.noSync) {
|
|
env.close();
|
|
throw new Error('Can not set noSync on a database that was opened with overlappingSync');
|
|
}
|
|
} else if (options.overlappingSync) {
|
|
if (userOptions.overlappingSync) {
|
|
env.close();
|
|
throw new Error('Can not enable overlappingSync on a database that was opened without this flag');
|
|
}
|
|
options.overlappingSync = false;
|
|
jsFlags = jsFlags & 0xff; // clear overlapping sync
|
|
setJSFlags(env.address, jsFlags);
|
|
}
|
|
|
|
env.readerCheck(); // clear out any stale entries
|
|
if ((options.overlappingSync || options.deleteOnClose) && !hasRegisteredOnExit && process.on) {
|
|
hasRegisteredOnExit = true;
|
|
process.on('exit', onExit);
|
|
}
|
|
|
|
class LMDBStore extends EventEmitter {
|
|
constructor(dbName, dbOptions) {
|
|
super();
|
|
if (dbName === undefined)
|
|
throw new Error('Database name must be supplied in name property (may be null for root database)');
|
|
|
|
if (options.compression && dbOptions.compression !== false && typeof dbOptions.compression != 'object')
|
|
dbOptions.compression = options.compression; // use the parent compression if available
|
|
else if (dbOptions.compression)
|
|
dbOptions.compression = makeCompression(dbOptions.compression);
|
|
|
|
if (dbOptions.dupSort && (dbOptions.useVersions || dbOptions.cache)) {
|
|
throw new Error('The dupSort flag can not be combined with versions or caching');
|
|
}
|
|
let keyIsBuffer = dbOptions.keyIsBuffer;
|
|
if (dbOptions.keyEncoding == 'uint32') {
|
|
dbOptions.keyIsUint32 = true;
|
|
} else if (dbOptions.keyEncoder) {
|
|
if (dbOptions.keyEncoder.enableNullTermination) {
|
|
dbOptions.keyEncoder.enableNullTermination();
|
|
} else
|
|
keyIsBuffer = true;
|
|
} else if (dbOptions.keyEncoding == 'binary') {
|
|
keyIsBuffer = true;
|
|
}
|
|
let flags = (dbOptions.reverseKey ? 0x02 : 0) |
|
|
(dbOptions.dupSort ? 0x04 : 0) |
|
|
(dbOptions.dupFixed ? 0x10 : 0) |
|
|
(dbOptions.integerDup ? 0x20 : 0) |
|
|
(dbOptions.reverseDup ? 0x40 : 0) |
|
|
(!options.readOnly && dbOptions.create !== false ? 0x40000 : 0) |
|
|
(dbOptions.useVersions ? 0x100 : 0);
|
|
let keyType = (dbOptions.keyIsUint32 || dbOptions.keyEncoding == 'uint32') ? 2 : keyIsBuffer ? 3 : 0;
|
|
if (keyType == 2)
|
|
flags |= 0x08; // integer key
|
|
|
|
if (options.readOnly) {
|
|
// in read-only mode we use a read-only txn to open the database
|
|
// TODO: LMDB is actually not entirely thread-safe when it comes to opening databases with
|
|
// read-only transactions since there is a race condition on setting the update dbis that
|
|
// occurs outside the lock
|
|
// make sure we are using a fresh read txn, so we don't want to share with a cursor txn
|
|
this.resetReadTxn();
|
|
this.ensureReadTxn();
|
|
this.db = new Dbi(env, flags, dbName, keyType, dbOptions.compression);
|
|
} else {
|
|
this.transactionSync(() => {
|
|
this.db = new Dbi(env, flags, dbName, keyType, dbOptions.compression);
|
|
}, options.overlappingSync ? 0x10002 : 2); // no flush-sync, but synchronously commit
|
|
}
|
|
this._commitReadTxn(); // current read transaction becomes invalid after opening another db
|
|
if (!this.db || this.db.dbi == 0xffffffff) {// not found
|
|
throw new Error('Database not found')
|
|
}
|
|
this.dbAddress = this.db.address;
|
|
this.db.name = dbName || null;
|
|
this.name = dbName;
|
|
this.status = 'open';
|
|
this.env = env;
|
|
this.reads = 0;
|
|
this.writes = 0;
|
|
this.transactions = 0;
|
|
this.averageTransactionTime = 5;
|
|
if (dbOptions.syncBatchThreshold)
|
|
console.warn('syncBatchThreshold is no longer supported');
|
|
if (dbOptions.immediateBatchThreshold)
|
|
console.warn('immediateBatchThreshold is no longer supported');
|
|
this.commitDelay = DEFAULT_COMMIT_DELAY;
|
|
Object.assign(this, { // these are the options that are inherited
|
|
path: options.path,
|
|
encoding: options.encoding,
|
|
strictAsyncOrder: options.strictAsyncOrder,
|
|
}, dbOptions);
|
|
let Encoder;
|
|
if (this.encoder && this.encoder.Encoder) {
|
|
Encoder = this.encoder.Encoder;
|
|
this.encoder = null; // don't copy everything from the module
|
|
}
|
|
if (!Encoder && !(this.encoder && this.encoder.encode) && (!this.encoding || this.encoding == 'msgpack' || this.encoding == 'cbor')) {
|
|
Encoder = (this.encoding == 'cbor' ? moduleRequire('cbor-x').Encoder : MsgpackrEncoder);
|
|
}
|
|
if (Encoder) {
|
|
this.encoder = new Encoder(Object.assign(
|
|
assignConstrainedProperties(['copyBuffers', 'getStructures', 'saveStructures', 'useFloat32', 'useRecords', 'structuredClone', 'variableMapSize', 'useTimestamp32', 'largeBigIntToFloat', 'encodeUndefinedAsNil', 'int64AsNumber', 'onInvalidDate', 'mapsAsObjects', 'useTag259ForMaps', 'pack', 'maxSharedStructures', 'shouldShareStructure', 'randomAccessStructure', 'freezeData'],
|
|
this.sharedStructuresKey ? this.setupSharedStructures() : {
|
|
copyBuffers: true, // need to copy any embedded buffers that are found since we use unsafe buffers
|
|
}, options, dbOptions), this.encoder));
|
|
}
|
|
if (this.encoding == 'json') {
|
|
this.encoder = {
|
|
encode: JSON.stringify,
|
|
};
|
|
} else if (this.encoder) {
|
|
this.decoder = this.encoder;
|
|
this.decoderCopies = !this.encoder.needsStableBuffer;
|
|
}
|
|
this.maxKeySize = maxKeySize;
|
|
applyKeyHandling(this);
|
|
allDbs.set(dbName ? name + '-' + dbName : name, this);
|
|
}
|
|
openDB(dbName, dbOptions) {
|
|
if (this.dupSort && this.name == null)
|
|
throw new Error('Can not open named databases if the main database is dupSort')
|
|
if (typeof dbName == 'object' && !dbOptions) {
|
|
dbOptions = dbName;
|
|
dbName = dbOptions.name;
|
|
} else
|
|
dbOptions = dbOptions || {};
|
|
try {
|
|
return dbOptions.cache ?
|
|
new (CachingStore(LMDBStore, env))(dbName, dbOptions) :
|
|
new LMDBStore(dbName, dbOptions);
|
|
} catch(error) {
|
|
if (error.message == 'Database not found')
|
|
return; // return undefined to indicate db not found
|
|
if (error.message.indexOf('MDB_DBS_FULL') > -1) {
|
|
error.message += ' (increase your maxDbs option)';
|
|
}
|
|
throw error;
|
|
}
|
|
}
|
|
open(dbOptions, callback) {
|
|
let db = this.openDB(dbOptions);
|
|
if (callback)
|
|
callback(null, db);
|
|
return db;
|
|
}
|
|
backup(path$1, compact) {
|
|
if (noFSAccess)
|
|
return;
|
|
fs.mkdirSync(path.dirname(path$1), { recursive: true });
|
|
return new Promise((resolve, reject) => env.copy(path$1, false, (error) => {
|
|
if (error) {
|
|
reject(error);
|
|
} else {
|
|
resolve();
|
|
}
|
|
}));
|
|
}
|
|
isOperational() {
|
|
return this.status == 'open';
|
|
}
|
|
sync(callback) {
|
|
return env.sync(callback || function(error) {
|
|
if (error) {
|
|
console.error(error);
|
|
}
|
|
});
|
|
}
|
|
deleteDB() {
|
|
console.warn('deleteDB() is deprecated, use drop or dropSync instead');
|
|
return this.dropSync();
|
|
}
|
|
dropSync() {
|
|
this.transactionSync(() =>
|
|
this.db.drop({
|
|
justFreePages: false
|
|
}), options.overlappingSync ? 0x10002 : 2);
|
|
}
|
|
clear(callback) {
|
|
if (typeof callback == 'function')
|
|
return this.clearAsync(callback);
|
|
console.warn('clear() is deprecated, use clearAsync or clearSync instead');
|
|
this.clearSync();
|
|
}
|
|
clearSync() {
|
|
if (this.encoder) {
|
|
if (this.encoder.clearSharedData)
|
|
this.encoder.clearSharedData();
|
|
else if (this.encoder.structures)
|
|
this.encoder.structures = [];
|
|
}
|
|
this.transactionSync(() =>
|
|
this.db.drop({
|
|
justFreePages: true
|
|
}), options.overlappingSync ? 0x10002 : 2);
|
|
}
|
|
readerCheck() {
|
|
return env.readerCheck();
|
|
}
|
|
readerList() {
|
|
return env.readerList().join('');
|
|
}
|
|
setupSharedStructures() {
|
|
const getStructures = () => {
|
|
let lastVersion; // because we are doing a read here, we may need to save and restore the lastVersion from the last read
|
|
if (this.useVersions)
|
|
lastVersion = getLastVersion();
|
|
let buffer = this.getBinary(this.sharedStructuresKey);
|
|
if (this.useVersions)
|
|
setLastVersion(lastVersion);
|
|
return buffer && this.decoder.decode(buffer);
|
|
};
|
|
return {
|
|
saveStructures: (structures, isCompatible) => {
|
|
return this.transactionSync(() => {
|
|
let existingStructuresBuffer = this.getBinary(this.sharedStructuresKey);
|
|
let existingStructures = existingStructuresBuffer && this.decoder.decode(existingStructuresBuffer);
|
|
if (typeof isCompatible == 'function' ?
|
|
!isCompatible(existingStructures) :
|
|
(existingStructures && existingStructures.length != isCompatible))
|
|
return false; // it changed, we need to indicate that we couldn't update
|
|
this.put(this.sharedStructuresKey, structures);
|
|
}, options.overlappingSync ? 0x10000 : 0);
|
|
},
|
|
getStructures,
|
|
copyBuffers: true, // need to copy any embedded buffers that are found since we use unsafe buffers
|
|
};
|
|
}
|
|
}
|
|
// if caching class overrides putSync, don't want to double call the caching code
|
|
LMDBStore.prototype.putSync;
|
|
LMDBStore.prototype.removeSync;
|
|
addReadMethods(LMDBStore, { env, maxKeySize, keyBytes, keyBytesView, getLastVersion });
|
|
if (!options.readOnly)
|
|
addWriteMethods(LMDBStore, { env, maxKeySize, fixedBuffer: keyBytes,
|
|
resetReadTxn: LMDBStore.prototype.resetReadTxn, ...options });
|
|
LMDBStore.prototype.supports = {
|
|
permanence: true,
|
|
bufferKeys: true,
|
|
promises: true,
|
|
snapshots: true,
|
|
clear: true,
|
|
status: true,
|
|
deferredOpen: true,
|
|
openCallback: true,
|
|
};
|
|
let Class = options.cache ? CachingStore(LMDBStore, env) : LMDBStore;
|
|
return options.asClass ? Class : new Class(options.name || null, options);
|
|
}
|
|
function openAsClass(path, options) {
|
|
if (typeof path == 'object' && !options) {
|
|
options = path;
|
|
path = options.path;
|
|
}
|
|
options = options || {};
|
|
options.asClass = true;
|
|
return open(path, options);
|
|
}
|
|
|
|
function getLastVersion() {
|
|
return keyBytesView.getFloat64(16, true);
|
|
}
|
|
function setLastVersion(version) {
|
|
return keyBytesView.setFloat64(16, version, true);
|
|
}
|
|
|
|
function getLastTxnId() {
|
|
return keyBytesView.getUint32(32, true);
|
|
}
|
|
|
|
const KEY_BUFFER_SIZE = 4096;
|
|
function allocateFixedBuffer() {
|
|
keyBytes = typeof Buffer != 'undefined' ? Buffer.allocUnsafeSlow(KEY_BUFFER_SIZE) : new Uint8Array(KEY_BUFFER_SIZE);
|
|
const keyBuffer = keyBytes.buffer;
|
|
keyBytesView = keyBytes.dataView || (keyBytes.dataView = new DataView(keyBytes.buffer, 0, KEY_BUFFER_SIZE)); // max key size is actually 4026
|
|
keyBytes.uint32 = new Uint32Array(keyBuffer, 0, KEY_BUFFER_SIZE >> 2);
|
|
keyBytes.float64 = new Float64Array(keyBuffer, 0, KEY_BUFFER_SIZE >> 3);
|
|
keyBytes.uint32.address = keyBytes.address = keyBuffer.address = getAddress(keyBuffer);
|
|
}
|
|
|
|
function exists(path) {
|
|
if (fs.existsSync)
|
|
return fs.existsSync(path);
|
|
try {
|
|
return fs.statSync(path);
|
|
} catch (error) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
function assignConstrainedProperties(allowedProperties, target) {
|
|
for (let i = 2; i < arguments.length; i++) {
|
|
let source = arguments[i];
|
|
for (let key in source) {
|
|
if (allowedProperties.includes(key))
|
|
target[key] = source[key];
|
|
}
|
|
}
|
|
return target;
|
|
}
|
|
|
|
function levelup(store) {
|
|
return Object.assign(Object.create(store), {
|
|
get(key, options, callback) {
|
|
let result = store.get(key);
|
|
if (typeof options == 'function')
|
|
callback = options;
|
|
if (callback) {
|
|
if (result === undefined)
|
|
callback(new NotFoundError());
|
|
else
|
|
callback(null, result);
|
|
} else {
|
|
if (result === undefined)
|
|
return Promise.reject(new NotFoundError());
|
|
else
|
|
return Promise.resolve(result);
|
|
}
|
|
},
|
|
});
|
|
}
|
|
class NotFoundError extends Error {
|
|
constructor(message) {
|
|
super(message);
|
|
this.name = 'NotFoundError';
|
|
this.notFound = true;
|
|
}
|
|
}
|
|
|
|
orderedBinary__namespace.enableNullTermination();
|
|
setExternals({
|
|
arch: os$1.arch, fs: fs__default["default"], tmpdir: os$1.tmpdir, MsgpackrEncoder: msgpackr.Encoder, WeakLRUCache: weakLruCache.WeakLRUCache, orderedBinary: orderedBinary__namespace,
|
|
EventEmitter: events.EventEmitter, os: os$1.platform(), onExit(callback) {
|
|
if (process.getMaxListeners() < process.listenerCount('exit') + 8)
|
|
process.setMaxListeners(process.listenerCount('exit') + 8);
|
|
process.on('exit', callback);
|
|
},
|
|
});
|
|
let { noop } = nativeAddon;
|
|
const TransactionFlags = {
|
|
ABORTABLE: 1,
|
|
SYNCHRONOUS_COMMIT: 2,
|
|
NO_SYNC_FLUSH: 0x10000,
|
|
};
|
|
var index = {
|
|
open, openAsClass, getLastVersion, compareKey: orderedBinary$1.compareKeys, keyValueToBuffer: orderedBinary$1.toBufferKey, bufferToKeyValue: orderedBinary$1.fromBufferKey, ABORT, IF_EXISTS: IF_EXISTS$1, asBinary, levelup, TransactionFlags
|
|
};
|
|
|
|
let require$1 = module$1.createRequire((typeof document === 'undefined' ? new (require('u' + 'rl').URL)('file:' + __filename).href : (document.currentScript && document.currentScript.src || new URL('index.cjs', document.baseURI).href)));
|
|
setRequire(require$1);
|
|
exports.v8AccelerationEnabled = false;
|
|
|
|
let versions = process.versions;
|
|
if (!versions.deno && !process.isBun) {
|
|
let [ majorVersion, minorVersion ] = versions.node.split('.');
|
|
if (versions.v8 && +majorVersion == nativeAddon.version.nodeCompiledVersion) {
|
|
let v8Funcs = {};
|
|
let fastApiCalls = (majorVersion == 17 || majorVersion == 18 || majorVersion == 16 && minorVersion > 8) && !process.env.DISABLE_TURBO_CALLS;
|
|
if (fastApiCalls) {
|
|
require$1('v8').setFlagsFromString('--turbo-fast-api-calls');
|
|
}
|
|
nativeAddon.enableDirectV8(v8Funcs, fastApiCalls);
|
|
Object.assign(nativeAddon, v8Funcs);
|
|
exports.v8AccelerationEnabled = true;
|
|
} else if (majorVersion == 14) {
|
|
// node v14 only has ABI compatibility with node v16 for zero-arg clearKeptObjects
|
|
let v8Funcs = {};
|
|
nativeAddon.enableDirectV8(v8Funcs, false);
|
|
nativeAddon.clearKeptObjects = v8Funcs.clearKeptObjects;
|
|
}
|
|
nativeAddon.enableThreadSafeCalls();
|
|
}
|
|
setNativeFunctions(nativeAddon);
|
|
|
|
Object.defineProperty(exports, 'bufferToKeyValue', {
|
|
enumerable: true,
|
|
get: function () { return orderedBinary$1.fromBufferKey; }
|
|
});
|
|
Object.defineProperty(exports, 'compareKey', {
|
|
enumerable: true,
|
|
get: function () { return orderedBinary$1.compareKeys; }
|
|
});
|
|
Object.defineProperty(exports, 'compareKeys', {
|
|
enumerable: true,
|
|
get: function () { return orderedBinary$1.compareKeys; }
|
|
});
|
|
Object.defineProperty(exports, 'keyValueToBuffer', {
|
|
enumerable: true,
|
|
get: function () { return orderedBinary$1.toBufferKey; }
|
|
});
|
|
exports.ABORT = ABORT;
|
|
exports.IF_EXISTS = IF_EXISTS$1;
|
|
exports.SKIP = SKIP;
|
|
exports.TransactionFlags = TransactionFlags;
|
|
exports.allDbs = allDbs;
|
|
exports.asBinary = asBinary;
|
|
exports["default"] = index;
|
|
exports.getLastTxnId = getLastTxnId;
|
|
exports.getLastVersion = getLastVersion;
|
|
exports.levelup = levelup;
|
|
exports.nativeAddon = nativeAddon;
|
|
exports.noop = noop;
|
|
exports.open = open;
|
|
exports.openAsClass = openAsClass;
|
|
//# sourceMappingURL=index.cjs.map
|