78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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SST_Mutex_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 mutex 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_Mutex.h>
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#define _WIN32_WINNT 0x0601 /* Windows 7 or later */
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#include <windows.h>
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#define SST_DEFAULT_SPINCOUNT 5500
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/*************************************************************************/
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SST_Mutex SST_Concurrency_CreateMutex(void)
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{
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CRITICAL_SECTION* cs = HeapAlloc(GetProcessHeap(), 0, sizeof(CRITICAL_SECTION));
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/* No memory? */
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if(!cs)
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return NULL;
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InitializeCriticalSectionAndSpinCount(cs, SST_DEFAULT_SPINCOUNT);
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return (SST_Mutex)cs;
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}
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/*************************************************************************/
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void SST_Concurrency_DestroyMutex(SST_Mutex _mutex)
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{
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CRITICAL_SECTION* cs = (CRITICAL_SECTION*)_mutex;
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DeleteCriticalSection(cs);
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HeapFree(GetProcessHeap(), 0, cs);
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}
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/*************************************************************************/
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void SST_Concurrency_LockMutex(SST_Mutex _mutex)
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{
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CRITICAL_SECTION* cs = (CRITICAL_SECTION*)_mutex;
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EnterCriticalSection(cs);
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}
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/*************************************************************************/
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int SST_Concurrency_TryLockMutex(SST_Mutex _mutex)
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{
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CRITICAL_SECTION* cs = (CRITICAL_SECTION*)_mutex;
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return (int)TryEnterCriticalSection(cs);
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}
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/*************************************************************************/
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void SST_Concurrency_UnlockMutex(SST_Mutex _mutex)
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{
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CRITICAL_SECTION* cs = (CRITICAL_SECTION*)_mutex;
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LeaveCriticalSection(cs);
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}
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