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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children 55f1f1b3e27d
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-1:000000000000 0:74212992fb08
1 <HTML
2 ><HEAD
3 ><TITLE
4 >SDL_DestroySemaphore</TITLE
5 ><META
6 NAME="GENERATOR"
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.61
8 "><LINK
9 REL="HOME"
10 TITLE="SDL Library Documentation"
11 HREF="index.html"><LINK
12 REL="UP"
13 TITLE="Multi-threaded Programming"
14 HREF="thread.html"><LINK
15 REL="PREVIOUS"
16 TITLE="SDL_CreateSemaphore"
17 HREF="sdlcreatesemaphore.html"><LINK
18 REL="NEXT"
19 TITLE="SDL_SemWait"
20 HREF="sdlsemwait.html"></HEAD
21 ><BODY
22 CLASS="REFENTRY"
23 BGCOLOR="#FFF8DC"
24 TEXT="#000000"
25 LINK="#0000ee"
26 VLINK="#551a8b"
27 ALINK="#ff0000"
28 ><DIV
29 CLASS="NAVHEADER"
30 ><TABLE
31 WIDTH="100%"
32 BORDER="0"
33 CELLPADDING="0"
34 CELLSPACING="0"
35 ><TR
36 ><TH
37 COLSPAN="3"
38 ALIGN="center"
39 >SDL Library Documentation</TH
40 ></TR
41 ><TR
42 ><TD
43 WIDTH="10%"
44 ALIGN="left"
45 VALIGN="bottom"
46 ><A
47 HREF="sdlcreatesemaphore.html"
48 >Prev</A
49 ></TD
50 ><TD
51 WIDTH="80%"
52 ALIGN="center"
53 VALIGN="bottom"
54 ></TD
55 ><TD
56 WIDTH="10%"
57 ALIGN="right"
58 VALIGN="bottom"
59 ><A
60 HREF="sdlsemwait.html"
61 >Next</A
62 ></TD
63 ></TR
64 ></TABLE
65 ><HR
66 ALIGN="LEFT"
67 WIDTH="100%"></DIV
68 ><H1
69 ><A
70 NAME="SDLDESTROYSEMAPHORE"
71 >SDL_DestroySemaphore</A
72 ></H1
73 ><DIV
74 CLASS="REFNAMEDIV"
75 ><A
76 NAME="AEN7357"
77 ></A
78 ><H2
79 >Name</H2
80 >SDL_DestroySemaphore&nbsp;--&nbsp;Destroys a semaphore that was created by <A
81 HREF="sdlcreatesemaphore.html"
82 >SDL_CreateSemaphore</A
83 >.</DIV
84 ><DIV
85 CLASS="REFSYNOPSISDIV"
86 ><A
87 NAME="AEN7361"
88 ></A
89 ><H2
90 >Synopsis</H2
91 ><DIV
92 CLASS="FUNCSYNOPSIS"
93 ><A
94 NAME="AEN7362"
95 ></A
96 ><P
97 ></P
98 ><PRE
99 CLASS="FUNCSYNOPSISINFO"
100 >#include "SDL.h"
101 #include "SDL_thread.h"</PRE
102 ><P
103 ><CODE
104 ><CODE
105 CLASS="FUNCDEF"
106 >void <B
107 CLASS="FSFUNC"
108 >SDL_DestroySemaphore</B
109 ></CODE
110 >(SDL_sem *sem);</CODE
111 ></P
112 ><P
113 ></P
114 ></DIV
115 ></DIV
116 ><DIV
117 CLASS="REFSECT1"
118 ><A
119 NAME="AEN7368"
120 ></A
121 ><H2
122 >Description</H2
123 ><P
124 ><TT
125 CLASS="FUNCTION"
126 >SDL_DestroySemaphore</TT
127 > destroys the semaphore pointed to
128 by <TT
129 CLASS="PARAMETER"
130 ><I
131 >sem</I
132 ></TT
133 > that was created by
134 <A
135 HREF="sdlcreatesemaphore.html"
136 ><TT
137 CLASS="FUNCTION"
138 >SDL_CreateSemaphore</TT
139 ></A
140 >.
141 It is not safe to destroy a semaphore if there are threads currently blocked
142 waiting on it.</P
143 ></DIV
144 ><DIV
145 CLASS="REFSECT1"
146 ><A
147 NAME="AEN7375"
148 ></A
149 ><H2
150 >Examples</H2
151 ><P
152 ><PRE
153 CLASS="PROGRAMLISTING"
154 >if (my_sem != NULL) {
155 SDL_DestroySemaphore(my_sem);
156 my_sem = NULL;
157 }</PRE
158 ></P
159 ></DIV
160 ><DIV
161 CLASS="REFSECT1"
162 ><A
163 NAME="AEN7379"
164 ></A
165 ><H2
166 >See Also</H2
167 ><P
168 ><A
169 HREF="sdlcreatesemaphore.html"
170 ><TT
171 CLASS="FUNCTION"
172 >SDL_CreateSemaphore</TT
173 ></A
174 >,
175 <A
176 HREF="sdlsemwait.html"
177 ><TT
178 CLASS="FUNCTION"
179 >SDL_SemWait</TT
180 ></A
181 >,
182 <A
183 HREF="sdlsemtrywait.html"
184 ><TT
185 CLASS="FUNCTION"
186 >SDL_SemTryWait</TT
187 ></A
188 >,
189 <A
190 HREF="sdlsemwaittimeout.html"
191 ><TT
192 CLASS="FUNCTION"
193 >SDL_SemWaitTimeout</TT
194 ></A
195 >,
196 <A
197 HREF="sdlsempost.html"
198 ><TT
199 CLASS="FUNCTION"
200 >SDL_SemPost</TT
201 ></A
202 >,
203 <A
204 HREF="sdlsemvalue.html"
205 ><TT
206 CLASS="FUNCTION"
207 >SDL_SemValue</TT
208 ></A
209 ></P
210 ></DIV
211 ><DIV
212 CLASS="NAVFOOTER"
213 ><HR
214 ALIGN="LEFT"
215 WIDTH="100%"><TABLE
216 WIDTH="100%"
217 BORDER="0"
218 CELLPADDING="0"
219 CELLSPACING="0"
220 ><TR
221 ><TD
222 WIDTH="33%"
223 ALIGN="left"
224 VALIGN="top"
225 ><A
226 HREF="sdlcreatesemaphore.html"
227 >Prev</A
228 ></TD
229 ><TD
230 WIDTH="34%"
231 ALIGN="center"
232 VALIGN="top"
233 ><A
234 HREF="index.html"
235 >Home</A
236 ></TD
237 ><TD
238 WIDTH="33%"
239 ALIGN="right"
240 VALIGN="top"
241 ><A
242 HREF="sdlsemwait.html"
243 >Next</A
244 ></TD
245 ></TR
246 ><TR
247 ><TD
248 WIDTH="33%"
249 ALIGN="left"
250 VALIGN="top"
251 >SDL_CreateSemaphore</TD
252 ><TD
253 WIDTH="34%"
254 ALIGN="center"
255 VALIGN="top"
256 ><A
257 HREF="thread.html"
258 >Up</A
259 ></TD
260 ><TD
261 WIDTH="33%"
262 ALIGN="right"
263 VALIGN="top"
264 >SDL_SemWait</TD
265 ></TR
266 ></TABLE
267 ></DIV
268 ></BODY
269 ></HTML
270 >