69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
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/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2018 Marius Greuel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "semaphore.h"
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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int sem_init(sem_t* sem, int pshared, unsigned int value)
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{
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if (sem == nullptr)
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return -1;
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sem->handle = nullptr;
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auto handle = CreateSemaphoreW(nullptr, value, MAXLONG32, nullptr);
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if (handle == nullptr)
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return -1;
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sem->handle = handle;
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return 0;
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}
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int sem_destroy(sem_t* sem)
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{
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if (sem == nullptr)
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return -1;
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if (sem->handle != nullptr)
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{
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CloseHandle(sem->handle);
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sem->handle = nullptr;
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}
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return 0;
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}
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int sem_post(sem_t* sem)
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{
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if (sem == nullptr)
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return -1;
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BOOL bStatus = ReleaseSemaphore(sem->handle, 1, nullptr);
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return bStatus ? 0 : -1;
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}
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int sem_wait(sem_t* sem)
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{
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if (sem == nullptr)
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return -1;
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DWORD dwStatus = WaitForSingleObject(sem->handle, INFINITE);
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return dwStatus == WAIT_OBJECT_0 ? 0 : -1;
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}
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