diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/riscos/SDL_syssem.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/riscos/SDL_syssem.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/riscos/SDL_syssem.c b/distrib/sdl-1.2.12/src/thread/riscos/SDL_syssem.c deleted file mode 100644 index 775eee3..0000000 --- a/distrib/sdl-1.2.12/src/thread/riscos/SDL_syssem.c +++ /dev/null @@ -1,203 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 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 <errno.h> - -#include "SDL_config.h" - -/* RISC OS semiphores based on linux code */ - - -#include "SDL_timer.h" -#include "SDL_thread.h" -#include "SDL_systhread_c.h" - -#if !SDL_THREADS_DISABLED - -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_SetError("SDL not configured with thread support"); - return (SDL_sem *)0; -} - -void SDL_DestroySemaphore(SDL_sem *sem) -{ - return; -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -int SDL_SemWait(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -Uint32 SDL_SemValue(SDL_sem *sem) -{ - return 0; -} - -int SDL_SemPost(SDL_sem *sem) -{ - SDL_SetError("SDL not configured with thread support"); - return -1; -} - -#else - - -#include <unistd.h> /* For getpid() */ -#include <pthread.h> -#include <semaphore.h> - -struct SDL_semaphore { - sem_t *sem; - sem_t sem_data; -}; - -/* Create a semaphore, initialized with value */ -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - SDL_sem *sem = (SDL_sem *) SDL_malloc(sizeof(SDL_sem)); - if ( sem ) { - if ( sem_init(&sem->sem_data, 0, initial_value) < 0 ) { - SDL_SetError("sem_init() failed"); - SDL_free(sem); - sem = NULL; - } else { - sem->sem = &sem->sem_data; - } - } else { - SDL_OutOfMemory(); - } - return sem; -} - -void SDL_DestroySemaphore(SDL_sem *sem) -{ - if ( sem ) { - sem_destroy(sem->sem); - SDL_free(sem); - } -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - retval = SDL_MUTEX_TIMEDOUT; - if ( sem_trywait(sem->sem) == 0 ) { - retval = 0; - } - return retval; -} - -int SDL_SemWait(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - while ( ((retval = sem_wait(sem->sem)) == -1) && (errno == EINTR) ) {} - if ( retval < 0 ) { - SDL_SetError("sem_wait() failed"); - } - return retval; -} - -int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - /* Try the easy cases first */ - if ( timeout == 0 ) { - return SDL_SemTryWait(sem); - } - if ( timeout == SDL_MUTEX_MAXWAIT ) { - return SDL_SemWait(sem); - } - - /* Ack! We have to busy wait... */ - timeout += SDL_GetTicks(); - do { - retval = SDL_SemTryWait(sem); - if ( retval == 0 ) { - break; - } - SDL_Delay(1); - } while ( SDL_GetTicks() < timeout ); - - return retval; -} - -Uint32 SDL_SemValue(SDL_sem *sem) -{ - int ret = 0; - if ( sem ) { - sem_getvalue(sem->sem, &ret); - if ( ret < 0 ) { - ret = 0; - } - } - return (Uint32)ret; -} - -int SDL_SemPost(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - retval = sem_post(sem->sem); - if ( retval < 0 ) { - SDL_SetError("sem_post() failed"); - } - return retval; -} - -#endif /* !SDL_THREADS_DISABLED */ |