Mercurial > sdl-ios-xcode
annotate docs/html/sdldestroysemaphore.html @ 3261:72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
The linux code appears to be complete and *should* be the base of all Unix and GCC based versions. The macosx and win32 versions
are currently just copies of the dummy code. I will begin working on the windows version as soon as this check in is done. I
need someone to work on the Mac OS X version.
I'm afraid that this check in will break QNX (Sorry!)
| author | Bob Pendleton <bob@pendleton.com> |
|---|---|
| date | Thu, 17 Sep 2009 20:35:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_DestroySemaphore</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_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 | |
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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="sdlcreatesemaphore.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="sdlsemwait.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="SDLDESTROYSEMAPHORE" | |
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74 ></A |
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75 >SDL_DestroySemaphore</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN7982" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_DestroySemaphore -- Destroys a semaphore that was created by <A | |
| 84 HREF="sdlcreatesemaphore.html" | |
| 85 >SDL_CreateSemaphore</A | |
| 86 >.</DIV | |
| 87 ><DIV | |
| 88 CLASS="REFSYNOPSISDIV" | |
| 89 ><A | |
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90 NAME="AEN7986" |
| 0 | 91 ></A |
| 92 ><H2 | |
| 93 >Synopsis</H2 | |
| 94 ><DIV | |
| 95 CLASS="FUNCSYNOPSIS" | |
| 96 ><A | |
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97 NAME="AEN7987" |
| 0 | 98 ></A |
| 99 ><P | |
| 100 ></P | |
| 101 ><PRE | |
| 102 CLASS="FUNCSYNOPSISINFO" | |
| 103 >#include "SDL.h" | |
| 104 #include "SDL_thread.h"</PRE | |
| 105 ><P | |
| 106 ><CODE | |
| 107 ><CODE | |
| 108 CLASS="FUNCDEF" | |
| 109 >void <B | |
| 110 CLASS="FSFUNC" | |
| 111 >SDL_DestroySemaphore</B | |
| 112 ></CODE | |
| 113 >(SDL_sem *sem);</CODE | |
| 114 ></P | |
| 115 ><P | |
| 116 ></P | |
| 117 ></DIV | |
| 118 ></DIV | |
| 119 ><DIV | |
| 120 CLASS="REFSECT1" | |
| 121 ><A | |
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122 NAME="AEN7993" |
| 0 | 123 ></A |
| 124 ><H2 | |
| 125 >Description</H2 | |
| 126 ><P | |
| 127 ><TT | |
| 128 CLASS="FUNCTION" | |
| 129 >SDL_DestroySemaphore</TT | |
| 130 > destroys the semaphore pointed to | |
| 131 by <TT | |
| 132 CLASS="PARAMETER" | |
| 133 ><I | |
| 134 >sem</I | |
| 135 ></TT | |
| 136 > that was created by | |
| 137 <A | |
| 138 HREF="sdlcreatesemaphore.html" | |
| 139 ><TT | |
| 140 CLASS="FUNCTION" | |
| 141 >SDL_CreateSemaphore</TT | |
| 142 ></A | |
| 143 >. | |
| 144 It is not safe to destroy a semaphore if there are threads currently blocked | |
| 145 waiting on it.</P | |
| 146 ></DIV | |
| 147 ><DIV | |
| 148 CLASS="REFSECT1" | |
| 149 ><A | |
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150 NAME="AEN8000" |
| 0 | 151 ></A |
| 152 ><H2 | |
| 153 >Examples</H2 | |
| 154 ><P | |
| 155 ><PRE | |
| 156 CLASS="PROGRAMLISTING" | |
| 157 >if (my_sem != NULL) { | |
| 158 SDL_DestroySemaphore(my_sem); | |
| 159 my_sem = NULL; | |
| 160 }</PRE | |
| 161 ></P | |
| 162 ></DIV | |
| 163 ><DIV | |
| 164 CLASS="REFSECT1" | |
| 165 ><A | |
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166 NAME="AEN8004" |
| 0 | 167 ></A |
| 168 ><H2 | |
| 169 >See Also</H2 | |
| 170 ><P | |
| 171 ><A | |
| 172 HREF="sdlcreatesemaphore.html" | |
| 173 ><TT | |
| 174 CLASS="FUNCTION" | |
| 175 >SDL_CreateSemaphore</TT | |
| 176 ></A | |
| 177 >, | |
| 178 <A | |
| 179 HREF="sdlsemwait.html" | |
| 180 ><TT | |
| 181 CLASS="FUNCTION" | |
| 182 >SDL_SemWait</TT | |
| 183 ></A | |
| 184 >, | |
| 185 <A | |
| 186 HREF="sdlsemtrywait.html" | |
| 187 ><TT | |
| 188 CLASS="FUNCTION" | |
| 189 >SDL_SemTryWait</TT | |
| 190 ></A | |
| 191 >, | |
| 192 <A | |
| 193 HREF="sdlsemwaittimeout.html" | |
| 194 ><TT | |
| 195 CLASS="FUNCTION" | |
| 196 >SDL_SemWaitTimeout</TT | |
| 197 ></A | |
| 198 >, | |
| 199 <A | |
| 200 HREF="sdlsempost.html" | |
| 201 ><TT | |
| 202 CLASS="FUNCTION" | |
| 203 >SDL_SemPost</TT | |
| 204 ></A | |
| 205 >, | |
| 206 <A | |
| 207 HREF="sdlsemvalue.html" | |
| 208 ><TT | |
| 209 CLASS="FUNCTION" | |
| 210 >SDL_SemValue</TT | |
| 211 ></A | |
| 212 ></P | |
| 213 ></DIV | |
| 214 ><DIV | |
| 215 CLASS="NAVFOOTER" | |
| 216 ><HR | |
| 217 ALIGN="LEFT" | |
| 218 WIDTH="100%"><TABLE | |
|
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219 SUMMARY="Footer navigation table" |
| 0 | 220 WIDTH="100%" |
| 221 BORDER="0" | |
| 222 CELLPADDING="0" | |
| 223 CELLSPACING="0" | |
| 224 ><TR | |
| 225 ><TD | |
| 226 WIDTH="33%" | |
| 227 ALIGN="left" | |
| 228 VALIGN="top" | |
| 229 ><A | |
| 230 HREF="sdlcreatesemaphore.html" | |
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231 ACCESSKEY="P" |
| 0 | 232 >Prev</A |
| 233 ></TD | |
| 234 ><TD | |
| 235 WIDTH="34%" | |
| 236 ALIGN="center" | |
| 237 VALIGN="top" | |
| 238 ><A | |
| 239 HREF="index.html" | |
|
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240 ACCESSKEY="H" |
| 0 | 241 >Home</A |
| 242 ></TD | |
| 243 ><TD | |
| 244 WIDTH="33%" | |
| 245 ALIGN="right" | |
| 246 VALIGN="top" | |
| 247 ><A | |
| 248 HREF="sdlsemwait.html" | |
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249 ACCESSKEY="N" |
| 0 | 250 >Next</A |
| 251 ></TD | |
| 252 ></TR | |
| 253 ><TR | |
| 254 ><TD | |
| 255 WIDTH="33%" | |
| 256 ALIGN="left" | |
| 257 VALIGN="top" | |
| 258 >SDL_CreateSemaphore</TD | |
| 259 ><TD | |
| 260 WIDTH="34%" | |
| 261 ALIGN="center" | |
| 262 VALIGN="top" | |
| 263 ><A | |
| 264 HREF="thread.html" | |
|
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265 ACCESSKEY="U" |
| 0 | 266 >Up</A |
| 267 ></TD | |
| 268 ><TD | |
| 269 WIDTH="33%" | |
| 270 ALIGN="right" | |
| 271 VALIGN="top" | |
| 272 >SDL_SemWait</TD | |
| 273 ></TR | |
| 274 ></TABLE | |
| 275 ></DIV | |
| 276 ></BODY | |
| 277 ></HTML | |
| 278 > |