| /* |
| 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); |
| } |