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| ||'''sem'''||^a pointer to the SDL_sem structure / semaphore to be incremented^|| | ||'''sem'''||^the semaphore to increment^|| |
DRAFT |
SDL_SemPost
Use this function to *unlock a semaphore and* atomically increase the semaphore's count (not blocking).
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Contents
Syntax
int SDL_SemPost(SDL_sem* sem)
Function Parameters
sem |
the semaphore to increment |
Return Value
Returns 0 on success (and increments the semaphore count) or a negative error code on failure *(leaving the semaphore unchanged)*; call SDL_GetError() for more information.
Code Examples
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SDL_SemPost(my_sem);
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Remarks
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SDL_SemPost() unlocks the semaphore pointed to by sem and atomically increments the semaphore's value. Threads that were blocking on the semaphore may be scheduled after this call succeeds.
SDL_SemPost() should be called after a semaphore is locked by a successful call to SDL_SemWait(), SDL_SemTryWait() or SDL_SemWaitTimeout().
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