Mercurial > sdl-ios-xcode
annotate docs/html/sdlsempost.html @ 4928:930614179450 SDL-1.2
Patch from Haiku's Google Code-In student Daniel Marth, fixes an off-by-one issue in bwindow.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 03 Dec 2010 16:55:25 -0800 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_SemPost</TITLE | |
5 ><META | |
6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
0 | 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_SemWaitTimeout" | |
17 HREF="sdlsemwaittimeout.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_SemValue" | |
20 HREF="sdlsemvalue.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 | |
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31 SUMMARY="Header navigation table" |
0 | 32 WIDTH="100%" |
33 BORDER="0" | |
34 CELLPADDING="0" | |
35 CELLSPACING="0" | |
36 ><TR | |
37 ><TH | |
38 COLSPAN="3" | |
39 ALIGN="center" | |
40 >SDL Library Documentation</TH | |
41 ></TR | |
42 ><TR | |
43 ><TD | |
44 WIDTH="10%" | |
45 ALIGN="left" | |
46 VALIGN="bottom" | |
47 ><A | |
48 HREF="sdlsemwaittimeout.html" | |
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49 ACCESSKEY="P" |
0 | 50 >Prev</A |
51 ></TD | |
52 ><TD | |
53 WIDTH="80%" | |
54 ALIGN="center" | |
55 VALIGN="bottom" | |
56 ></TD | |
57 ><TD | |
58 WIDTH="10%" | |
59 ALIGN="right" | |
60 VALIGN="bottom" | |
61 ><A | |
62 HREF="sdlsemvalue.html" | |
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63 ACCESSKEY="N" |
0 | 64 >Next</A |
65 ></TD | |
66 ></TR | |
67 ></TABLE | |
68 ><HR | |
69 ALIGN="LEFT" | |
70 WIDTH="100%"></DIV | |
71 ><H1 | |
72 ><A | |
73 NAME="SDLSEMPOST" | |
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74 ></A |
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75 >SDL_SemPost</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN8170" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_SemPost -- Unlock a semaphore.</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN8173" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN8174" |
0 | 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 >int <B | |
107 CLASS="FSFUNC" | |
108 >SDL_SemPost</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 | |
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119 NAME="AEN8180" |
0 | 120 ></A |
121 ><H2 | |
122 >Description</H2 | |
123 ><P | |
124 ><TT | |
125 CLASS="FUNCTION" | |
126 >SDL_SemPost</TT | |
127 > unlocks the semaphore pointed to by | |
128 <TT | |
129 CLASS="PARAMETER" | |
130 ><I | |
131 >sem</I | |
132 ></TT | |
133 > and atomically increments the semaphores value. | |
134 Threads that were blocking on the semaphore may be scheduled after this call | |
135 succeeds.</P | |
136 ><P | |
137 ><TT | |
138 CLASS="FUNCTION" | |
139 >SDL_SemPost</TT | |
140 > should be called after a semaphore is locked by a successful call to | |
141 <A | |
142 HREF="sdlsemwait.html" | |
143 >SDL_SemWait</A | |
144 >, | |
145 <A | |
146 HREF="sdlsemtrywait.html" | |
147 >SDL_SemTryWait</A | |
148 > or | |
149 <A | |
150 HREF="sdlsemwaittimeout.html" | |
151 >SDL_SemWaitTimeout</A | |
152 >.</P | |
153 ></DIV | |
154 ><DIV | |
155 CLASS="REFSECT1" | |
156 ><A | |
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157 NAME="AEN8190" |
0 | 158 ></A |
159 ><H2 | |
160 >Return Value</H2 | |
161 ><P | |
162 >Returns <SPAN | |
163 CLASS="RETURNVALUE" | |
164 >0</SPAN | |
165 > if successful or | |
166 <SPAN | |
167 CLASS="RETURNVALUE" | |
168 >-1</SPAN | |
169 > if there was an error (leaving the semaphore unchanged).</P | |
170 ></DIV | |
171 ><DIV | |
172 CLASS="REFSECT1" | |
173 ><A | |
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174 NAME="AEN8195" |
0 | 175 ></A |
176 ><H2 | |
177 >Examples</H2 | |
178 ><P | |
179 ><PRE | |
180 CLASS="PROGRAMLISTING" | |
181 >SDL_SemPost(my_sem);</PRE | |
182 ></P | |
183 ></DIV | |
184 ><DIV | |
185 CLASS="REFSECT1" | |
186 ><A | |
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187 NAME="AEN8199" |
0 | 188 ></A |
189 ><H2 | |
190 >See Also</H2 | |
191 ><P | |
192 ><A | |
193 HREF="sdlcreatesemaphore.html" | |
194 ><TT | |
195 CLASS="FUNCTION" | |
196 >SDL_CreateSemaphore</TT | |
197 ></A | |
198 >, | |
199 <A | |
200 HREF="sdldestroysemaphore.html" | |
201 ><TT | |
202 CLASS="FUNCTION" | |
203 >SDL_DestroySemaphore</TT | |
204 ></A | |
205 >, | |
206 <A | |
207 HREF="sdlsemwait.html" | |
208 ><TT | |
209 CLASS="FUNCTION" | |
210 >SDL_SemWait</TT | |
211 ></A | |
212 >, | |
213 <A | |
214 HREF="sdlsemtrywait.html" | |
215 ><TT | |
216 CLASS="FUNCTION" | |
217 >SDL_SemTryWait</TT | |
218 ></A | |
219 >, | |
220 <A | |
221 HREF="sdlsemwaittimeout.html" | |
222 ><TT | |
223 CLASS="FUNCTION" | |
224 >SDL_SemWaitTimeout</TT | |
225 ></A | |
226 >, | |
227 <A | |
228 HREF="sdlsemvalue.html" | |
229 ><TT | |
230 CLASS="FUNCTION" | |
231 >SDL_SemValue</TT | |
232 ></A | |
233 ></P | |
234 ></DIV | |
235 ><DIV | |
236 CLASS="NAVFOOTER" | |
237 ><HR | |
238 ALIGN="LEFT" | |
239 WIDTH="100%"><TABLE | |
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240 SUMMARY="Footer navigation table" |
0 | 241 WIDTH="100%" |
242 BORDER="0" | |
243 CELLPADDING="0" | |
244 CELLSPACING="0" | |
245 ><TR | |
246 ><TD | |
247 WIDTH="33%" | |
248 ALIGN="left" | |
249 VALIGN="top" | |
250 ><A | |
251 HREF="sdlsemwaittimeout.html" | |
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252 ACCESSKEY="P" |
0 | 253 >Prev</A |
254 ></TD | |
255 ><TD | |
256 WIDTH="34%" | |
257 ALIGN="center" | |
258 VALIGN="top" | |
259 ><A | |
260 HREF="index.html" | |
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261 ACCESSKEY="H" |
0 | 262 >Home</A |
263 ></TD | |
264 ><TD | |
265 WIDTH="33%" | |
266 ALIGN="right" | |
267 VALIGN="top" | |
268 ><A | |
269 HREF="sdlsemvalue.html" | |
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270 ACCESSKEY="N" |
0 | 271 >Next</A |
272 ></TD | |
273 ></TR | |
274 ><TR | |
275 ><TD | |
276 WIDTH="33%" | |
277 ALIGN="left" | |
278 VALIGN="top" | |
279 >SDL_SemWaitTimeout</TD | |
280 ><TD | |
281 WIDTH="34%" | |
282 ALIGN="center" | |
283 VALIGN="top" | |
284 ><A | |
285 HREF="thread.html" | |
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286 ACCESSKEY="U" |
0 | 287 >Up</A |
288 ></TD | |
289 ><TD | |
290 WIDTH="33%" | |
291 ALIGN="right" | |
292 VALIGN="top" | |
293 >SDL_SemValue</TD | |
294 ></TR | |
295 ></TABLE | |
296 ></DIV | |
297 ></BODY | |
298 ></HTML | |
299 > |