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Manpages SDL_SemWaitSection: SDL API Reference (3)Updated: Tue 11 Sep 2001, 23:00 Index Return to Main Contents NAMESDL_SemWait- Lock a semaphore and suspend the thread if the semaphore value is zero.SYNOPSIS#include "SDL.h" #include "SDL_thread.h" int SDL_SemWait(SDL_sem *sem); DESCRIPTIONSDL_SemWait() suspends the calling thread until either the semaphore pointed to by sem has a positive value, the call is interrupted by a signal or error. If the call is successful it will atomically decrement the semaphore value. After SDL_SemWait() is successful, the semaphore can be released and its count atomically incremented by a successful call to SDL_SemPost. RETURN VALUEReturns 0 if successful or -1 if there was an error (leaving the semaphore unchanged). EXAMPLES
if (SDL_SemWait(my_sem) == -1) { return WAIT_FAILED; } ... SDL_SemPost(my_sem); SEE ALSOSDL_CreateSemaphore, SDL_DestroySemaphore, SDL_SemTryWait, SDL_SemWaitTimeout, SDL_SemPost, SDL_SemValue
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