.TH "SDL_SemPost" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" 

.SH "NAME"

SDL_SemPost \- Unlock a semaphore\&.

.SH "SYNOPSIS"

.PP

\fB#include "SDL\&.h"

#include "SDL_thread\&.h"

.sp

\fBint \fBSDL_SemPost\fP\fR(\fBSDL_sem *sem\fR);

.SH "DESCRIPTION"

.PP

\fBSDL_SemPost\fP unlocks the semaphore pointed to by \fBsem\fR and atomically increments the semaphores value\&. Threads that were blocking on the semaphore may be scheduled after this call succeeds\&.

.PP

\fBSDL_SemPost\fP should be called after a semaphore is locked by a successful call to \fISDL_SemWait\fR, \fISDL_SemTryWait\fR or \fISDL_SemWaitTimeout\fR\&.

.SH "RETURN VALUE"

.PP

Returns \fB0\fR if successful or \fB-1\fR if there was an error (leaving the semaphore unchanged)\&.

.SH "EXAMPLES"

.PP

.PP

.nf

\f(CWSDL_SemPost(my_sem);\fR

.fi

.PP

.SH "SEE ALSO"

.PP

\fI\fBSDL_CreateSemaphore\fP\fR, \fI\fBSDL_DestroySemaphore\fP\fR, \fI\fBSDL_SemWait\fP\fR, \fI\fBSDL_SemTryWait\fP\fR, \fI\fBSDL_SemWaitTimeout\fP\fR, \fI\fBSDL_SemValue\fP\fR

...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00