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annotate docs/man3/SDL_CreateSemaphore.3 @ 55:55f1f1b3e27d

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Added new docs for SDL 1.2.1
author Sam Lantinga <slouken@lokigames.com>
date Sun, 10 Jun 2001 19:31:57 +0000
parents 74212992fb08
children e5bc29de3f0a
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55f1f1b3e27d Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents: 0
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1 .TH "SDL_CreateSemaphore" "3" "Sun 10 Jun 2001, 19:41" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_CreateSemaphore\- Creates a new semaphore and assigns an initial value to it\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 #include "SDL_thread\&.h"
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8 .sp
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9 \fBSDL_sem *\fBSDL_CreateSemaphore\fP\fR(\fBUint32 initial_value\fR);
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10 .SH "DESCRIPTION"
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11 .PP
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12 \fBSDL_CreateSemaphore()\fP creates a new semaphore and initializes it with the value \fBinitial_value\fR\&. Each locking operation on the semaphore by \fISDL_SemWait\fR, \fISDL_SemTryWait\fR or \fISDL_SemWaitTimeout\fR 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 \fISDL_SemPost\fR will atomically increment the semaphore value\&.
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13 .SH "RETURN VALUE"
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14 .PP
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15 Returns a pointer to an initialized semaphore or \fBNULL\fR if there was an error\&.
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16 .SH "EXAMPLES"
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17 .PP
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18 .PP
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19 .nf
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20 \f(CWSDL_sem *my_sem;
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21
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22 my_sem = SDL_CreateSemaphore(INITIAL_SEM_VALUE);
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23
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24 if (my_sem == NULL) {
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25 return CREATE_SEM_FAILED;
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26 }\fR
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27 .fi
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28 .PP
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29 .SH "SEE ALSO"
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30 .PP
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31 \fI\fBSDL_DestroySemaphore\fP\fR, \fI\fBSDL_SemWait\fP\fR, \fI\fBSDL_SemTryWait\fP\fR, \fI\fBSDL_SemWaitTimeout\fP\fR, \fI\fBSDL_SemPost\fP\fR, \fI\fBSDL_SemValue\fP\fR
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55f1f1b3e27d Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents: 0
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32 ...\" created by instant / docbook-to-man, Sun 10 Jun 2001, 19:41