diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/thread/irix/SDL_syssem.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/thread/irix/SDL_syssem.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/distrib/sdl-1.2.12/src/thread/irix/SDL_syssem.c b/distrib/sdl-1.2.12/src/thread/irix/SDL_syssem.c deleted file mode 100644 index 8b3311b..0000000 --- a/distrib/sdl-1.2.12/src/thread/irix/SDL_syssem.c +++ /dev/null @@ -1,219 +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 "SDL_config.h" - -#include "SDL_thread.h" -#include "SDL_timer.h" - - -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/ipc.h> -#include <sys/sem.h> -#include <errno.h> - -#include "SDL_error.h" -#include "SDL_thread.h" - - -struct SDL_semaphore { - int id; -}; - -/* Not defined by many operating systems, use configure to detect */ -/* -#if !defined(HAVE_SEMUN) -union semun { - int val; - struct semid_ds *buf; - ushort *array; -}; -#endif -*/ - -static struct sembuf op_trywait[2] = { - { 0, -1, (IPC_NOWAIT|SEM_UNDO) } /* Decrement semaphore, no block */ -}; -static struct sembuf op_wait[2] = { - { 0, -1, SEM_UNDO } /* Decrement semaphore */ -}; -static struct sembuf op_post[1] = { - { 0, 1, (IPC_NOWAIT|SEM_UNDO) } /* Increment semaphore */ -}; - -/* Create a blockable semaphore */ -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) -{ - extern int _creating_thread_lock; /* SDL_threads.c */ - SDL_sem *sem; - union semun init; - - sem = (SDL_sem *)SDL_malloc(sizeof(*sem)); - if ( sem == NULL ) { - SDL_OutOfMemory(); - return(NULL); - } - sem->id = semget(IPC_PRIVATE, 1, (0600|IPC_CREAT)); - if ( sem->id < 0 ) { - SDL_SetError("Couldn't create semaphore"); - SDL_free(sem); - return(NULL); - } - init.val = initial_value; /* Initialize semaphore */ - semctl(sem->id, 0, SETVAL, init); - return(sem); -} - -void SDL_DestroySemaphore(SDL_sem *sem) -{ - if ( sem ) { -#ifdef __IRIX__ - semctl(sem->id, 0, IPC_RMID); -#else - union semun dummy; - dummy.val = 0; - semctl(sem->id, 0, IPC_RMID, dummy); -#endif - SDL_free(sem); - } -} - -int SDL_SemTryWait(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - retval = 0; - tryagain: - if ( semop(sem->id, op_trywait, 1) < 0 ) { - if ( errno == EINTR ) { - goto tryagain; - } - retval = SDL_MUTEX_TIMEDOUT; - } - return retval; -} - -int SDL_SemWait(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - retval = 0; - tryagain: - if ( semop(sem->id, op_wait, 1) < 0 ) { - if ( errno == EINTR ) { - goto tryagain; - } - SDL_SetError("Semaphore operation error"); - retval = -1; - } - 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 semval; - Uint32 value; - - value = 0; - if ( sem ) { - tryagain: -#ifdef __IRIX__ - semval = semctl(sem->id, 0, GETVAL); -#else - { - union semun arg; - arg.val = 0; - semval = semctl(sem->id, 0, GETVAL, arg); - } -#endif - if ( semval < 0 ) { - if ( errno == EINTR ) { - goto tryagain; - } - } else { - value = (Uint32)semval; - } - } - return value; -} - -int SDL_SemPost(SDL_sem *sem) -{ - int retval; - - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } - - retval = 0; - tryagain: - if ( semop(sem->id, op_post, 1) < 0 ) { - if ( errno == EINTR ) { - goto tryagain; - } - SDL_SetError("Semaphore operation error"); - retval = -1; - } - return retval; -} |