Rechercher une page de manuel
SDL_SemWait
Langue: en
Version: 122007 (mandriva - 01/05/08)
Section: 3 (Bibliothèques de fonctions)
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_SemPost, SDL_SemValue
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre