SDL_TryWaitSemaphore - Man Page

#include <SDL3/SDL_mutex.h>

bool SDL_TryWaitSemaphore(SDL_Semaphore *sem);

This function checks to see if the semaphore pointed to by sem has a positive value and atomically decrements the semaphore value if it does. If the semaphore doesn't have a positive value, the function immediately returns false.

sem

the semaphore to wait on.

Returns true if the wait succeeds, false if the wait would block.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

SDL_SignalSemaphore(3), SDL_WaitSemaphore(3), SDL_WaitSemaphoreTimeout(3)

SDL_CreateSemaphore(3), SDL_SignalSemaphore(3), SDL_WaitSemaphore(3), SDL_WaitSemaphoreTimeout(3).