67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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SST_Semaphore_Win32.c
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Author: Patrick Baggett <ptbaggett@762studios.com>
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Created: 12/20/2011
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Purpose:
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libsst-concurrency semaphore functions for Win32 platforms (Windows 7 or later)
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License:
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This program is free software. It comes without any warranty, to
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the extent permitted by applicable law. You can redistribute it
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and/or modify it under the terms of the Do What The Fuck You Want
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To Public License, Version 2, as published by Sam Hocevar. See
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http://sam.zoy.org/wtfpl/COPYING for more details.
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*/
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#include <SST/SST_Concurrency.h> /* SST_WAIT_INFINITE */
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#define _WIN32_WINNT 0x0601 /* Windows 7 or later */
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#include <windows.h>
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/*************************************************************************/
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SST_Semaphore SST_Concurrency_CreateSemaphore(uint32_t _initialCount)
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{
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/* Windows wants a maximum count, so 2^31-1 */
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HANDLE hSema = CreateSemaphoreA(NULL, _initialCount, (LONG)INT32_MAX, NULL);
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return (SST_Semaphore)hSema;
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}
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/*************************************************************************/
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void SST_Concurrency_DestroySemaphore(SST_Semaphore _sema)
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{
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HANDLE hSema = (HANDLE)_sema;
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CloseHandle(hSema);
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}
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/*************************************************************************/
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void SST_Concurrency_PostSemaphore(SST_Semaphore _sema, uint32_t _count)
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{
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HANDLE hSema = (HANDLE)_sema;
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ReleaseSemaphore(hSema, _count, NULL);
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}
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/*************************************************************************/
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int SST_Concurrency_WaitSemaphore(SST_Semaphore _sema, uint32_t _ticks)
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{
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HANDLE hSema = (HANDLE)_sema;
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DWORD dwTime;
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if(_ticks == SST_WAIT_INFINITE)
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dwTime = INFINITE;
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else
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dwTime = (DWORD)_ticks;
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return (WaitForSingleObject(hSema, dwTime) == WAIT_OBJECT_0);
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}
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