Mercurial > sdl-ios-xcode
diff src/thread/windows/SDL_sysmutex.c @ 5062:e8916fe9cfc8
Fixed bug #925
Changed "win32" to "windows"
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 20 Jan 2011 18:04:05 -0800 |
parents | src/thread/win32/SDL_sysmutex.c@f7b03b6838cb |
children | 327f181542f1 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/thread/windows/SDL_sysmutex.c Thu Jan 20 18:04:05 2011 -0800 @@ -0,0 +1,102 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2010 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +/* Mutex functions using the Win32 API */ + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> + +#include "SDL_mutex.h" + + +struct SDL_mutex +{ + HANDLE id; +}; + +/* Create a mutex */ +SDL_mutex * +SDL_CreateMutex(void) +{ + SDL_mutex *mutex; + + /* Allocate mutex memory */ + mutex = (SDL_mutex *) SDL_malloc(sizeof(*mutex)); + if (mutex) { + /* Create the mutex, with initial value signaled */ + mutex->id = CreateMutex(NULL, FALSE, NULL); + if (!mutex->id) { + SDL_SetError("Couldn't create mutex"); + SDL_free(mutex); + mutex = NULL; + } + } else { + SDL_OutOfMemory(); + } + return (mutex); +} + +/* Free the mutex */ +void +SDL_DestroyMutex(SDL_mutex * mutex) +{ + if (mutex) { + if (mutex->id) { + CloseHandle(mutex->id); + mutex->id = 0; + } + SDL_free(mutex); + } +} + +/* Lock the mutex */ +int +SDL_mutexP(SDL_mutex * mutex) +{ + if (mutex == NULL) { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + if (WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED) { + SDL_SetError("Couldn't wait on mutex"); + return -1; + } + return (0); +} + +/* Unlock the mutex */ +int +SDL_mutexV(SDL_mutex * mutex) +{ + if (mutex == NULL) { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + if (ReleaseMutex(mutex->id) == FALSE) { + SDL_SetError("Couldn't release mutex"); + return -1; + } + return (0); +} + +/* vi: set ts=4 sw=4 expandtab: */