Mercurial > sdl-ios-xcode
annotate docs/html/sdldestroysemaphore.html @ 211:0cc95f442f3a
If we're looking at the /dev/input event devices, and we found
at least one, then we don't want to look at the input joystick
devices, since they're built on top of devices that we've already
seen, so we're done.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 22 Oct 2001 21:34:50 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| 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 1.64 |
| 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 | |
| 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 | |
|
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76 NAME="AEN7594" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_DestroySemaphore -- 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 | |
|
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87 NAME="AEN7598" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
|
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94 NAME="AEN7599" |
| 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 >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 | |
|
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119 NAME="AEN7605" |
| 0 | 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 | |
|
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147 NAME="AEN7612" |
| 0 | 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 | |
|
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163 NAME="AEN7616" |
| 0 | 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 > |