avrdude/msvc/semaphore.cpp

69 lines
1.6 KiB
C++
Raw Permalink Normal View History

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