2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "SDL_config.h"
24 /* Mutex functions using the Win32 API */
26 #define WIN32_LEAN_AND_MEAN
29 #include "SDL_mutex.h"
37 SDL_mutex *SDL_CreateMutex(void)
41 /* Allocate mutex memory */
42 mutex = (SDL_mutex *)SDL_malloc(sizeof(*mutex));
44 /* Create the mutex, with initial value signaled */
45 mutex->id = CreateMutex(NULL, FALSE, NULL);
47 SDL_SetError("Couldn't create mutex");
58 void SDL_DestroyMutex(SDL_mutex *mutex)
62 CloseHandle(mutex->id);
70 int SDL_mutexP(SDL_mutex *mutex)
72 if ( mutex == NULL ) {
73 SDL_SetError("Passed a NULL mutex");
76 if ( WaitForSingleObject(mutex->id, INFINITE) == WAIT_FAILED ) {
77 SDL_SetError("Couldn't wait on mutex");
83 /* Unlock the mutex */
84 int SDL_mutexV(SDL_mutex *mutex)
86 if ( mutex == NULL ) {
87 SDL_SetError("Passed a NULL mutex");
90 if ( ReleaseMutex(mutex->id) == FALSE ) {
91 SDL_SetError("Couldn't release mutex");