Mercurial > sdl-ios-xcode
annotate docs/html/thread.html @ 78:e9582f471c02
Added the environment variable SDL_MOUSE_NORELATIVE to completely disable
relative mouse motion if the application desires it. UNDOCUMENTED!!
| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Sat, 23 Jun 2001 18:51:29 +0000 |
| parents | 55f1f1b3e27d |
| children | e5bc29de3f0a |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Multi-threaded Programming</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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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="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CDtrack" | |
| 17 HREF="sdlcdtrack.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CreateThread" | |
| 20 HREF="sdlcreatethread.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="threads"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
| 35 WIDTH="100%" | |
| 36 BORDER="0" | |
| 37 CELLPADDING="0" | |
| 38 CELLSPACING="0" | |
| 39 ><TR | |
| 40 ><TH | |
| 41 COLSPAN="3" | |
| 42 ALIGN="center" | |
| 43 >SDL Library Documentation</TH | |
| 44 ></TR | |
| 45 ><TR | |
| 46 ><TD | |
| 47 WIDTH="10%" | |
| 48 ALIGN="left" | |
| 49 VALIGN="bottom" | |
| 50 ><A | |
| 51 HREF="sdlcdtrack.html" | |
| 52 >Prev</A | |
| 53 ></TD | |
| 54 ><TD | |
| 55 WIDTH="80%" | |
| 56 ALIGN="center" | |
| 57 VALIGN="bottom" | |
| 58 ></TD | |
| 59 ><TD | |
| 60 WIDTH="10%" | |
| 61 ALIGN="right" | |
| 62 VALIGN="bottom" | |
| 63 ><A | |
| 64 HREF="sdlcreatethread.html" | |
| 65 >Next</A | |
| 66 ></TD | |
| 67 ></TR | |
| 68 ></TABLE | |
| 69 ><HR | |
| 70 ALIGN="LEFT" | |
| 71 WIDTH="100%"></DIV | |
| 72 ><DIV | |
| 73 CLASS="CHAPTER" | |
| 74 ><H1 | |
| 75 ><A | |
| 76 NAME="THREAD" | |
| 77 >Chapter 12. Multi-threaded Programming</A | |
| 78 ></H1 | |
| 79 ><DIV | |
| 80 CLASS="TOC" | |
| 81 ><DL | |
| 82 ><DT | |
| 83 ><B | |
| 84 >Table of Contents</B | |
| 85 ></DT | |
| 86 ><DT | |
| 87 ><A | |
| 88 HREF="sdlcreatethread.html" | |
| 89 >SDL_CreateThread</A | |
| 90 > — Creates a new thread of execution that shares its parent's properties.</DT | |
| 91 ><DT | |
| 92 ><A | |
| 93 HREF="sdlthreadid.html" | |
| 94 >SDL_ThreadID</A | |
| 95 > — Get the 32-bit thread identifier for the current thread.</DT | |
| 96 ><DT | |
| 97 ><A | |
| 98 HREF="sdlgetthreadid.html" | |
| 99 >SDL_GetThreadID</A | |
| 100 > — Get the SDL thread ID of a SDL_Thread</DT | |
| 101 ><DT | |
| 102 ><A | |
| 103 HREF="sdlwaitthread.html" | |
| 104 >SDL_WaitThread</A | |
| 105 > — Wait for a thread to finish.</DT | |
| 106 ><DT | |
| 107 ><A | |
| 108 HREF="sdlkillthread.html" | |
| 109 >SDL_KillThread</A | |
| 110 > — Gracelessly terminates the thread.</DT | |
| 111 ><DT | |
| 112 ><A | |
| 113 HREF="sdlcreatemutex.html" | |
| 114 >SDL_CreateMutex</A | |
| 115 > — Create a mutex</DT | |
| 116 ><DT | |
| 117 ><A | |
| 118 HREF="sdldestroymutex.html" | |
| 119 >SDL_DestroyMutex</A | |
| 120 > — Destroy a mutex</DT | |
| 121 ><DT | |
| 122 ><A | |
| 123 HREF="sdlmutexp.html" | |
| 124 >SDL_mutexP</A | |
| 125 > — Lock a mutex</DT | |
| 126 ><DT | |
| 127 ><A | |
| 128 HREF="sdlmutexv.html" | |
| 129 >SDL_mutexV</A | |
| 130 > — Unlock a mutex</DT | |
| 131 ><DT | |
| 132 ><A | |
| 133 HREF="sdlcreatesemaphore.html" | |
| 134 >SDL_CreateSemaphore</A | |
| 135 > — Creates a new semaphore and assigns an initial value to it.</DT | |
| 136 ><DT | |
| 137 ><A | |
| 138 HREF="sdldestroysemaphore.html" | |
| 139 >SDL_DestroySemaphore</A | |
| 140 > — Destroys a semaphore that was created by <A | |
| 141 HREF="sdlcreatesemaphore.html" | |
| 142 >SDL_CreateSemaphore</A | |
| 143 >.</DT | |
| 144 ><DT | |
| 145 ><A | |
| 146 HREF="sdlsemwait.html" | |
| 147 >SDL_SemWait</A | |
| 148 > — Lock a semaphore and suspend the thread if the semaphore value is zero.</DT | |
| 149 ><DT | |
| 150 ><A | |
| 151 HREF="sdlsemtrywait.html" | |
| 152 >SDL_SemTryWait</A | |
| 153 > — Attempt to lock a semaphore but don't suspend the thread.</DT | |
| 154 ><DT | |
| 155 ><A | |
| 156 HREF="sdlsemwaittimeout.html" | |
| 157 >SDL_SemWaitTimeout</A | |
| 158 > — Lock a semaphore, but only wait up to a specified maximum time.</DT | |
| 159 ><DT | |
| 160 ><A | |
| 161 HREF="sdlsempost.html" | |
| 162 >SDL_SemPost</A | |
| 163 > — Unlock a semaphore.</DT | |
| 164 ><DT | |
| 165 ><A | |
| 166 HREF="sdlsemvalue.html" | |
| 167 >SDL_SemValue</A | |
| 168 > — Return the current value of a semaphore.</DT | |
| 169 ><DT | |
| 170 ><A | |
| 171 HREF="sdlcreatecond.html" | |
| 172 >SDL_CreateCond</A | |
| 173 > — Create a condition variable</DT | |
| 174 ><DT | |
| 175 ><A | |
| 176 HREF="sdldestroycond.html" | |
| 177 >SDL_DestroyCond</A | |
| 178 > — Destroy a condition variable</DT | |
| 179 ><DT | |
| 180 ><A | |
| 181 HREF="sdlcondsignal.html" | |
| 182 >SDL_CondSignal</A | |
| 183 > — Restart a thread wait on a condition variable</DT | |
| 184 ><DT | |
| 185 ><A | |
| 186 HREF="sdlcondbroadcast.html" | |
| 187 >SDL_CondBroadcast</A | |
| 188 > — Restart all threads waiting on a condition variable</DT | |
| 189 ><DT | |
| 190 ><A | |
| 191 HREF="sdlcondwait.html" | |
| 192 >SDL_CondWait</A | |
| 193 > — Wait on a condition variable</DT | |
| 194 ><DT | |
| 195 ><A | |
| 196 HREF="sdlcondwaittimeout.html" | |
| 197 >SDL_CondWaitTimeout</A | |
| 198 > — Wait on a condition variable, with timeout</DT | |
| 199 ></DL | |
| 200 ></DIV | |
| 201 ><P | |
| 202 >SDL provides functions for creating threads, mutexes, semphores and condition variables.</P | |
| 203 ><P | |
| 204 >In general, you must be very aware of concurrency and data integrity issues | |
| 205 when writing multi-threaded programs. Some good guidelines include: | |
| 206 <P | |
| 207 ></P | |
| 208 ><UL | |
| 209 ><LI | |
| 210 ><P | |
| 211 >Don't call SDL video/event functions from separate threads</P | |
| 212 ></LI | |
| 213 ><LI | |
| 214 ><P | |
| 215 >Don't use any library functions in separate threads</P | |
| 216 ></LI | |
| 217 ><LI | |
| 218 ><P | |
| 219 >Don't perform any memory management in separate threads</P | |
| 220 ></LI | |
| 221 ><LI | |
| 222 ><P | |
| 223 >Lock global variables which may be accessed by multiple threads</P | |
| 224 ></LI | |
| 225 ><LI | |
| 226 ><P | |
| 227 >Never terminate threads, always set a flag and wait for them to quit</P | |
| 228 ></LI | |
| 229 ><LI | |
| 230 ><P | |
| 231 >Think very carefully about all possible ways your code may interact</P | |
| 232 ></LI | |
| 233 ></UL | |
| 234 ></P | |
| 235 ><DIV | |
| 236 CLASS="NOTE" | |
| 237 ><BLOCKQUOTE | |
| 238 CLASS="NOTE" | |
| 239 ><P | |
| 240 ><B | |
| 241 >Note: </B | |
| 242 >SDL's threading is not implemented on MacOS, due to that lack of preemptive thread support (eck!)</P | |
| 243 ></BLOCKQUOTE | |
| 244 ></DIV | |
| 245 ></DIV | |
| 246 ><DIV | |
| 247 CLASS="NAVFOOTER" | |
| 248 ><HR | |
| 249 ALIGN="LEFT" | |
| 250 WIDTH="100%"><TABLE | |
| 251 WIDTH="100%" | |
| 252 BORDER="0" | |
| 253 CELLPADDING="0" | |
| 254 CELLSPACING="0" | |
| 255 ><TR | |
| 256 ><TD | |
| 257 WIDTH="33%" | |
| 258 ALIGN="left" | |
| 259 VALIGN="top" | |
| 260 ><A | |
| 261 HREF="sdlcdtrack.html" | |
| 262 >Prev</A | |
| 263 ></TD | |
| 264 ><TD | |
| 265 WIDTH="34%" | |
| 266 ALIGN="center" | |
| 267 VALIGN="top" | |
| 268 ><A | |
| 269 HREF="index.html" | |
| 270 >Home</A | |
| 271 ></TD | |
| 272 ><TD | |
| 273 WIDTH="33%" | |
| 274 ALIGN="right" | |
| 275 VALIGN="top" | |
| 276 ><A | |
| 277 HREF="sdlcreatethread.html" | |
| 278 >Next</A | |
| 279 ></TD | |
| 280 ></TR | |
| 281 ><TR | |
| 282 ><TD | |
| 283 WIDTH="33%" | |
| 284 ALIGN="left" | |
| 285 VALIGN="top" | |
| 286 >SDL_CDtrack</TD | |
| 287 ><TD | |
| 288 WIDTH="34%" | |
| 289 ALIGN="center" | |
| 290 VALIGN="top" | |
| 291 ><A | |
| 292 HREF="reference.html" | |
| 293 >Up</A | |
| 294 ></TD | |
| 295 ><TD | |
| 296 WIDTH="33%" | |
| 297 ALIGN="right" | |
| 298 VALIGN="top" | |
| 299 >SDL_CreateThread</TD | |
| 300 ></TR | |
| 301 ></TABLE | |
| 302 ></DIV | |
| 303 ></BODY | |
| 304 ></HTML | |
| 305 > |