(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)

SDL_SemPost

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

Header File

Defined in SDL_mutex.h, but apps should only #include "SDL.h"!

Syntax

int SDL_SemPost(SDL_sem * 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 2.0.0.

See Also

• SDL_CreateSemaphore
• SDL_DestroySemaphore
• SDL_SemTryWait
• SDL_SemValue
• SDL_SemWait
• SDL_SemWaitTimeout

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CategoryAPI, CategoryAPIFunction

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