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

SDL_PostSemaphore

Atomically increment a semaphore's value and wake waiting threads.

Header File

Defined in SDL_mutex.h, but apps should use #include <SDL3/SDL.h>

Syntax

int SDL_PostSemaphore(SDL_Semaphore *sem);

Function Parameters

sem	the semaphore to increment

Return Value

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

Version

This function is available since SDL 3.0.0.

See Also

• SDL_TryWaitSemaphore
• SDL_WaitSemaphore
• SDL_WaitSemaphoreTimeout

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CategoryAPI, CategoryAPIFunction

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