SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Wait until a semaphore has a positive value and then decrements it.


int SDL_WaitSemaphore(SDL_Semaphore *sem);

Function Parameters

sem the semaphore wait on

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


This function suspends the calling thread until either the semaphore pointed to by sem has a positive value or the call is interrupted by a signal or error. If the call is successful it will atomically decrement the semaphore value.

This function is the equivalent of calling SDL_WaitSemaphoreTimeout() with a time length of -1.


This function is available since SDL 3.0.0.


[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.