zenilib
0.5.3.0
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Macros | |
#define | SDL_MUTEX_MAXWAIT (~(Uint32)0) |
#define | SDL_MUTEX_TIMEDOUT 1 |
Mutex functions | |
#define | SDL_mutexP(m) SDL_LockMutex(m) |
#define | SDL_mutexV(m) SDL_UnlockMutex(m) |
typedef struct SDL_mutex | SDL_mutex |
DECLSPEC SDL_mutex *SDLCALL | SDL_CreateMutex (void) |
DECLSPEC int SDLCALL | SDL_LockMutex (SDL_mutex *mutex) |
DECLSPEC int SDLCALL | SDL_TryLockMutex (SDL_mutex *mutex) |
DECLSPEC int SDLCALL | SDL_UnlockMutex (SDL_mutex *mutex) |
DECLSPEC void SDLCALL | SDL_DestroyMutex (SDL_mutex *mutex) |
Semaphore functions | |
typedef struct SDL_semaphore | SDL_sem |
DECLSPEC SDL_sem *SDLCALL | SDL_CreateSemaphore (Uint32 initial_value) |
DECLSPEC void SDLCALL | SDL_DestroySemaphore (SDL_sem *sem) |
DECLSPEC int SDLCALL | SDL_SemWait (SDL_sem *sem) |
DECLSPEC int SDLCALL | SDL_SemTryWait (SDL_sem *sem) |
DECLSPEC int SDLCALL | SDL_SemWaitTimeout (SDL_sem *sem, Uint32 ms) |
DECLSPEC int SDLCALL | SDL_SemPost (SDL_sem *sem) |
DECLSPEC Uint32 SDLCALL | SDL_SemValue (SDL_sem *sem) |
Condition variable functions | |
typedef struct SDL_cond | SDL_cond |
DECLSPEC SDL_cond *SDLCALL | SDL_CreateCond (void) |
DECLSPEC void SDLCALL | SDL_DestroyCond (SDL_cond *cond) |
DECLSPEC int SDLCALL | SDL_CondSignal (SDL_cond *cond) |
DECLSPEC int SDLCALL | SDL_CondBroadcast (SDL_cond *cond) |
DECLSPEC int SDLCALL | SDL_CondWait (SDL_cond *cond, SDL_mutex *mutex) |
DECLSPEC int SDLCALL | SDL_CondWaitTimeout (SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) |
#define SDL_MUTEX_MAXWAIT (~(Uint32)0) |
This is the timeout value which corresponds to never time out.
Definition at line 49 of file SDL_mutex.h.
Referenced by SDL_CondWait(), SDL_CondWaitTimeout(), SDL_SemWait(), SDL_SemWaitTimeout(), and SDL_TimerThread().
#define SDL_MUTEX_TIMEDOUT 1 |
Synchronization functions which can time out return this value if they time out.
Definition at line 44 of file SDL_mutex.h.
Referenced by SDL_CondWaitTimeout(), SDL_SemTryWait(), SDL_SemWaitTimeout(), and SDL_TryLockMutex().
#define SDL_mutexP | ( | m | ) | SDL_LockMutex(m) |
#define SDL_mutexV | ( | m | ) | SDL_UnlockMutex(m) |
Unlock the mutex.
Definition at line 89 of file SDL_mutex.h.
typedef struct SDL_cond SDL_cond |
Definition at line 167 of file SDL_mutex.h.
typedef struct SDL_mutex SDL_mutex |
Definition at line 59 of file SDL_mutex.h.
typedef struct SDL_semaphore SDL_sem |
Definition at line 107 of file SDL_mutex.h.
Restart all threads that are waiting on the condition variable.
Definition at line 106 of file SDL_syscond.c.
References i, SDL_LockMutex(), SDL_SemPost(), SDL_SemWait(), SDL_SetError(), and SDL_UnlockMutex().
Restart one of the threads that are waiting on the condition variable.
Definition at line 82 of file SDL_syscond.c.
References SDL_LockMutex(), SDL_SemPost(), SDL_SemWait(), SDL_SetError(), and SDL_UnlockMutex().
Referenced by SDL_DestroySemaphore(), and SDL_SemPost().
Wait on the condition variable, unlocking the provided mutex.
The mutex is re-locked once the condition variable is signaled.
Definition at line 215 of file SDL_syscond.c.
References SDL_CondWaitTimeout(), SDL_MUTEX_MAXWAIT, and SDL_SetError().
Waits for at most ms
milliseconds, and returns 0 if the condition variable is signaled, SDL_MUTEX_TIMEDOUT if the condition is not signaled in the allotted time, and -1 on error.
Definition at line 160 of file SDL_syscond.c.
References NULL, SDL_LockMutex(), SDL_MUTEX_MAXWAIT, SDL_MUTEX_TIMEDOUT, SDL_SemPost(), SDL_SemWait(), SDL_SemWaitTimeout(), SDL_SetError(), and SDL_UnlockMutex().
Referenced by SDL_CondWait(), and SDL_SemWaitTimeout().
Create a condition variable.
Typical use of condition variables:
Thread A: SDL_LockMutex(lock); while ( ! condition ) { SDL_CondWait(cond, lock); } SDL_UnlockMutex(lock);
Thread B: SDL_LockMutex(lock); ... condition = true; ... SDL_CondSignal(cond); SDL_UnlockMutex(lock);
There is some discussion whether to signal the condition variable with the mutex locked or not. There is some potential performance benefit to unlocking first on some platforms, but there are some potential race conditions depending on how your code is structured.
In general it's safer to signal the condition variable while the mutex is locked.
Definition at line 42 of file SDL_syscond.c.
References NULL, SDL_CreateMutex(), SDL_CreateSemaphore(), SDL_DestroyCond(), SDL_free(), SDL_malloc(), SDL_OutOfMemory, and SDL_SetError().
Referenced by SDL_CreateSemaphore().
Create a mutex, initialized unlocked.
Definition at line 38 of file SDL_sysmutex.c.
References NULL, SDL_calloc(), SDL_CreateSemaphore(), SDL_free(), SDL_malloc(), SDL_OutOfMemory, and SDL_SetError().
Referenced by open_audio_device(), SDL_AtomicTryLock(), SDL_CreateCond(), SDL_CreateSemaphore(), SDL_Generic_GetTLSData(), SDL_ReportAssertion(), SDL_StartEventLoop(), and SDL_TimerInit().
Create a semaphore, initialized with value, returns NULL on failure.
Definition at line 85 of file SDL_syssem.c.
References free, malloc, NULL, SDL_CreateCond(), SDL_CreateMutex(), SDL_DestroySemaphore(), SDL_free(), SDL_malloc(), SDL_OutOfMemory, and SDL_SetError().
Referenced by PSP_EventInit(), SDL_CreateCond(), SDL_CreateMutex(), SDL_CreateThread(), SDL_SYS_JoystickInit(), and SDL_TimerInit().
Destroy a condition variable.
Definition at line 64 of file SDL_syscond.c.
References SDL_DestroyMutex(), SDL_DestroySemaphore(), and SDL_free().
Referenced by SDL_CreateCond(), and SDL_DestroySemaphore().
Destroy a mutex.
Definition at line 61 of file SDL_sysmutex.c.
References SDL_DestroySemaphore(), and SDL_free().
Referenced by close_audio_device(), SDL_AssertionsQuit(), SDL_DestroyCond(), SDL_DestroySemaphore(), SDL_StopEventLoop(), SDL_TimerInit(), and SDL_TimerQuit().
Destroy a semaphore.
Definition at line 111 of file SDL_syssem.c.
References free, NULL, SDL_CondSignal(), SDL_Delay(), SDL_DestroyCond(), SDL_DestroyMutex(), SDL_free(), SDL_LockMutex(), and SDL_UnlockMutex().
Referenced by PSP_EventQuit(), SDL_CreateSemaphore(), SDL_CreateThread(), SDL_DestroyCond(), SDL_DestroyMutex(), SDL_SYS_JoystickQuit(), and SDL_TimerQuit().
Definition at line 73 of file SDL_sysmutex.c.
References NULL, SDL_SemWait(), SDL_SetError(), and SDL_ThreadID().
Referenced by outputCallback(), SDL_AddTimer(), SDL_AtomicTryLock(), SDL_AudioLockDevice_Default(), SDL_CondBroadcast(), SDL_CondSignal(), SDL_CondWaitTimeout(), SDL_DestroySemaphore(), SDL_FilterEvents(), SDL_FlushEvents(), SDL_Generic_GetTLSData(), SDL_Generic_SetTLSData(), SDL_PeepEvents(), SDL_RemoveTimer(), SDL_ReportAssertion(), SDL_RunAudio(), SDL_SemPost(), SDL_SemTryWait(), SDL_SemValue(), SDL_SemWaitTimeout(), and SDL_StopEventLoop().
Atomically increases the semaphore's count (not blocking).
Definition at line 200 of file SDL_syssem.c.
References NULL, SDL_CondSignal(), SDL_LockMutex(), SDL_SetError(), and SDL_UnlockMutex().
Referenced by EventUpdate(), JoystickUpdate(), PSP_PumpEvents(), SDL_AddTimer(), SDL_CondBroadcast(), SDL_CondSignal(), SDL_CondWaitTimeout(), SDL_mutexV(), SDL_RunThread(), SDL_SYS_JoystickUpdate(), and SDL_TimerQuit().
Non-blocking variant of SDL_SemWait().
Definition at line 130 of file SDL_syssem.c.
References SDL_LockMutex(), SDL_MUTEX_TIMEDOUT, SDL_SemWaitTimeout(), SDL_SetError(), and SDL_UnlockMutex().
Referenced by SDL_SemWaitTimeout().
Returns the current count of the semaphore.
Definition at line 186 of file SDL_syssem.c.
References NULL, ret, SDL_LockMutex(), SDL_SetError(), and SDL_UnlockMutex().
This function suspends the calling thread until the semaphore pointed to by sem
has a positive count. It then atomically decreases the semaphore count.
Definition at line 180 of file SDL_syssem.c.
References SDL_MUTEX_MAXWAIT, SDL_SemWaitTimeout(), and SDL_SetError().
Referenced by EventUpdate(), JoystickUpdate(), PSP_PumpEvents(), SDL_CondBroadcast(), SDL_CondSignal(), SDL_CondWaitTimeout(), SDL_CreateThread(), SDL_LockMutex(), SDL_mutexP(), SDL_SemWaitTimeout(), SDL_SYS_JoystickUpdate(), and SDL_TryLockMutex().
Variant of SDL_SemWait() with a timeout in milliseconds.
Definition at line 150 of file SDL_syssem.c.
References NULL, SDL_CondWaitTimeout(), SDL_Delay(), SDL_GetTicks(), SDL_LockMutex(), SDL_MUTEX_MAXWAIT, SDL_MUTEX_TIMEDOUT, SDL_SemTryWait(), SDL_SemWait(), SDL_SetError(), and SDL_UnlockMutex().
Referenced by SDL_CondWaitTimeout(), SDL_SemTryWait(), SDL_SemWait(), and SDL_TimerThread().
Try to lock the mutex
Definition at line 103 of file SDL_sysmutex.c.
References NULL, SDL_MUTEX_TIMEDOUT, SDL_SemWait(), SDL_SetError(), and SDL_ThreadID().
Definition at line 160 of file SDL_sysmutex.c.
References NULL, and SDL_SetError().
Referenced by outputCallback(), SDL_AddTimer(), SDL_AtomicTryLock(), SDL_AudioUnlockDevice_Default(), SDL_CondBroadcast(), SDL_CondSignal(), SDL_CondWaitTimeout(), SDL_DestroySemaphore(), SDL_FilterEvents(), SDL_FlushEvents(), SDL_Generic_GetTLSData(), SDL_Generic_SetTLSData(), SDL_PeepEvents(), SDL_RemoveTimer(), SDL_ReportAssertion(), SDL_RunAudio(), SDL_SemPost(), SDL_SemTryWait(), SDL_SemValue(), SDL_SemWaitTimeout(), and SDL_StopEventLoop().