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1 | .TH "SDL_SemPost" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" |
2 | .SH "NAME" |
3 | SDL_SemPost \- Unlock a semaphore\&. |
4 | .SH "SYNOPSIS" |
5 | .PP |
6 | \fB#include "SDL\&.h" |
7 | #include "SDL_thread\&.h" |
8 | .sp |
9 | \fBint \fBSDL_SemPost\fP\fR(\fBSDL_sem *sem\fR); |
10 | .SH "DESCRIPTION" |
11 | .PP |
12 | \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\&. |
13 | .PP |
14 | \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\&. |
15 | .SH "RETURN VALUE" |
16 | .PP |
17 | Returns \fB0\fR if successful or \fB-1\fR if there was an error (leaving the semaphore unchanged)\&. |
18 | .SH "EXAMPLES" |
19 | .PP |
20 | .PP |
21 | .nf |
22 | \f(CWSDL_SemPost(my_sem);\fR |
23 | .fi |
24 | .PP |
25 | .SH "SEE ALSO" |
26 | .PP |
27 | \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 |
28 | .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00 |