Mercurial > sdl-ios-xcode
diff src/thread/irix/SDL_syssem.c @ 1662:782fd950bd46 SDL-1.3
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid.
The code is now run through a consistent indent format:
indent -i4 -nut -nsc -br -ce
The headers are being converted to automatically generate doxygen documentation.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 28 May 2006 13:04:16 +0000 |
parents | ad887c988713 |
children | 4da1ee79c9af |
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line diff
--- a/src/thread/irix/SDL_syssem.c Sun May 21 17:27:13 2006 +0000 +++ b/src/thread/irix/SDL_syssem.c Sun May 28 13:04:16 2006 +0000 @@ -36,8 +36,9 @@ #include "SDL_thread.h" -struct SDL_semaphore { - int id; +struct SDL_semaphore +{ + int id; }; /* Not defined by many operating systems, use configure to detect */ @@ -52,168 +53,178 @@ */ static struct sembuf op_trywait[2] = { - { 0, -1, (IPC_NOWAIT|SEM_UNDO) } /* Decrement semaphore, no block */ + {0, -1, (IPC_NOWAIT | SEM_UNDO)} /* Decrement semaphore, no block */ }; static struct sembuf op_wait[2] = { - { 0, -1, SEM_UNDO } /* Decrement semaphore */ + {0, -1, SEM_UNDO} /* Decrement semaphore */ }; static struct sembuf op_post[1] = { - { 0, 1, (IPC_NOWAIT|SEM_UNDO) } /* Increment semaphore */ + {0, 1, (IPC_NOWAIT | SEM_UNDO)} /* Increment semaphore */ }; /* Create a blockable semaphore */ -SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) +SDL_sem * +SDL_CreateSemaphore (Uint32 initial_value) { - extern int _creating_thread_lock; /* SDL_threads.c */ - SDL_sem *sem; - union semun init; + 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); + 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) +void +SDL_DestroySemaphore (SDL_sem * sem) { - if ( sem ) { + if (sem) { #ifdef __IRIX__ - semctl(sem->id, 0, IPC_RMID); + semctl (sem->id, 0, IPC_RMID); #else - union semun dummy; - dummy.val = 0; - semctl(sem->id, 0, IPC_RMID, dummy); + union semun dummy; + dummy.val = 0; + semctl (sem->id, 0, IPC_RMID, dummy); #endif - SDL_free(sem); - } + SDL_free (sem); + } } -int SDL_SemTryWait(SDL_sem *sem) +int +SDL_SemTryWait (SDL_sem * sem) { - int retval; + int retval; - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } + if (!sem) { + SDL_SetError ("Passed a NULL semaphore"); + return -1; + } - retval = 0; + retval = 0; tryagain: - if ( semop(sem->id, op_trywait, 1) < 0 ) { - if ( errno == EINTR ) { - goto tryagain; - } - retval = SDL_MUTEX_TIMEDOUT; - } - return retval; + 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 +SDL_SemWait (SDL_sem * sem) { - int retval; + int retval; - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } + if (!sem) { + SDL_SetError ("Passed a NULL semaphore"); + return -1; + } - retval = 0; + 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; + 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 +SDL_SemWaitTimeout (SDL_sem * sem, Uint32 timeout) { - int retval; + int retval; - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } + 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); - } + /* 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 ); + /* 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; + return retval; } -Uint32 SDL_SemValue(SDL_sem *sem) +Uint32 +SDL_SemValue (SDL_sem * sem) { - int semval; - Uint32 value; - - value = 0; - if ( sem ) { - tryagain: + int semval; + Uint32 value; + + value = 0; + if (sem) { + tryagain: #ifdef __IRIX__ - semval = semctl(sem->id, 0, GETVAL); + semval = semctl (sem->id, 0, GETVAL); #else - { - union semun arg; - arg.val = 0; - semval = semctl(sem->id, 0, GETVAL, arg); - } + { + 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; + if (semval < 0) { + if (errno == EINTR) { + goto tryagain; + } + } else { + value = (Uint32) semval; + } + } + return value; } -int SDL_SemPost(SDL_sem *sem) +int +SDL_SemPost (SDL_sem * sem) { - int retval; + int retval; - if ( ! sem ) { - SDL_SetError("Passed a NULL semaphore"); - return -1; - } + if (!sem) { + SDL_SetError ("Passed a NULL semaphore"); + return -1; + } - retval = 0; + 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; + if (semop (sem->id, op_post, 1) < 0) { + if (errno == EINTR) { + goto tryagain; + } + SDL_SetError ("Semaphore operation error"); + retval = -1; + } + return retval; } + +/* vi: set ts=4 sw=4 expandtab: */