sdlSemWait function

int sdlSemWait(Pointer<SdlSem> sem)

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

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_SemWaitTimeout() with a time length of SDL_MUTEX_MAXWAIT.

\param sem the semaphore wait on \returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

\since This function is available since SDL 2.0.0.

\sa SDL_CreateSemaphore \sa SDL_DestroySemaphore \sa SDL_SemPost \sa SDL_SemTryWait \sa SDL_SemValue \sa SDL_SemWait \sa SDL_SemWaitTimeout

extern DECLSPEC int SDLCALL SDL_SemWait(SDL_sem * sem)

Implementation

int sdlSemWait(Pointer<SdlSem> sem) {
  final sdlSemWaitLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Pointer<SdlSem> sem),
      int Function(Pointer<SdlSem> sem)>('SDL_SemWait');
  return sdlSemWaitLookupFunction(sem);
}