redhat man page for sdl_createsemaphore

SDL_CreateSemaphore(3)						 SDL API Reference					    SDL_CreateSemaphore(3)

NAME
       SDL_CreateSemaphore- Creates a new semaphore and assigns an initial value to it.

SYNOPSIS
       #include "SDL.h" #include "SDL_thread.h"

       SDL_sem *SDL_CreateSemaphore(Uint32 initial_value);

DESCRIPTION
       SDL_CreateSemaphore()  creates  a new semaphore and initializes it with the value initial_value. Each locking operation on the semaphore by
       SDL_SemWait, SDL_SemTryWait or SDL_SemWaitTimeout will atomically decrement the semaphore value. The locking operation will be  blocked	if
       the  semaphore  value  is  not  positive  (greater than zero). Each unlock operation by SDL_SemPost will atomically increment the semaphore
       value.

RETURN VALUE
       Returns a pointer to an initialized semaphore or NULL if there was an error.

EXAMPLES
       SDL_sem *my_sem;

       my_sem = SDL_CreateSemaphore(INITIAL_SEM_VALUE);

       if (my_sem == NULL) {
	       return CREATE_SEM_FAILED;
       }

SEE ALSO
       SDL_DestroySemaphore, SDL_SemWait, SDL_SemTryWait, SDL_SemWaitTimeout, SDL_SemPost, SDL_SemValue

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