diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/thread/pth/SDL_sysmutex.c')
-rw-r--r-- | distrib/sdl-1.2.15/src/thread/pth/SDL_sysmutex.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/thread/pth/SDL_sysmutex.c b/distrib/sdl-1.2.15/src/thread/pth/SDL_sysmutex.c new file mode 100644 index 0000000..ca83b92 --- /dev/null +++ b/distrib/sdl-1.2.15/src/thread/pth/SDL_sysmutex.c @@ -0,0 +1,87 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 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" + +/* + * GNU pth mutexes + * + * Patrice Mandin + */ + +#include <pth.h> + +#include "SDL_mutex.h" +#include "SDL_sysmutex_c.h" + +/* 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 */ + if (!pth_mutex_init(&(mutex->mutexpth_p))) { + 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 ) { + SDL_free(mutex); + } +} + +/* Lock the mutex */ +int SDL_mutexP(SDL_mutex *mutex) +{ + if ( mutex == NULL ) { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + + pth_mutex_acquire(&(mutex->mutexpth_p), FALSE, NULL); + + return(0); +} + +/* Unlock the mutex */ +int SDL_mutexV(SDL_mutex *mutex) +{ + if ( mutex == NULL ) { + SDL_SetError("Passed a NULL mutex"); + return -1; + } + + pth_mutex_release(&(mutex->mutexpth_p)); + + return(0); +} |