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CentOS 7.0 - man page for sdl_semwait (centos section 3)

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SDL_SemWait(3)				SDL API Reference			   SDL_SemWait(3)

NAME
       SDL_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);

DESCRIPTION
       SDL_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 VALUE
       Returns 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 ALSO
       SDL_CreateSemaphore, SDL_DestroySemaphore,  SDL_SemTryWait,  SDL_SemWaitTimeout,  SDL_Sem-
       Post, SDL_SemValue

SDL				      Tue 11 Sep 2001, 23:00			   SDL_SemWait(3)
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