Mercurial > sdl-ios-xcode
annotate docs/html/thread.html @ 4179:d7294b7c732d SDL-1.2
Date: Fri, 24 Apr 2009 17:47:07 +0200
From: Stefan Klug
Subject: Re: [SDL] SVN doesn't compile for wince
the patch applied for Revision 4483 was seemingly not checked for side
effects.
It broke the WinCE build.
The attached patch should fix these problems. I'm not using SDL 1.2 on
CE anymore, and therefore haven't tested the patch... but at least it
compiles ;-)
Regards Stefan
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 07 May 2009 12:40:16 +0000 |
| parents | f12379c41042 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Multi-threaded Programming</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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="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 | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
35 SUMMARY="Header navigation table" |
| 0 | 36 WIDTH="100%" |
| 37 BORDER="0" | |
| 38 CELLPADDING="0" | |
| 39 CELLSPACING="0" | |
| 40 ><TR | |
| 41 ><TH | |
| 42 COLSPAN="3" | |
| 43 ALIGN="center" | |
| 44 >SDL Library Documentation</TH | |
| 45 ></TR | |
| 46 ><TR | |
| 47 ><TD | |
| 48 WIDTH="10%" | |
| 49 ALIGN="left" | |
| 50 VALIGN="bottom" | |
| 51 ><A | |
| 52 HREF="sdlcdtrack.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
53 ACCESSKEY="P" |
| 0 | 54 >Prev</A |
| 55 ></TD | |
| 56 ><TD | |
| 57 WIDTH="80%" | |
| 58 ALIGN="center" | |
| 59 VALIGN="bottom" | |
| 60 ></TD | |
| 61 ><TD | |
| 62 WIDTH="10%" | |
| 63 ALIGN="right" | |
| 64 VALIGN="bottom" | |
| 65 ><A | |
| 66 HREF="sdlcreatethread.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
67 ACCESSKEY="N" |
| 0 | 68 >Next</A |
| 69 ></TD | |
| 70 ></TR | |
| 71 ></TABLE | |
| 72 ><HR | |
| 73 ALIGN="LEFT" | |
| 74 WIDTH="100%"></DIV | |
| 75 ><DIV | |
| 76 CLASS="CHAPTER" | |
| 77 ><H1 | |
| 78 ><A | |
| 79 NAME="THREAD" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
80 ></A |
|
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
81 >Chapter 12. Multi-threaded Programming</H1 |
| 0 | 82 ><DIV |
| 83 CLASS="TOC" | |
| 84 ><DL | |
| 85 ><DT | |
| 86 ><B | |
| 87 >Table of Contents</B | |
| 88 ></DT | |
| 89 ><DT | |
| 90 ><A | |
| 91 HREF="sdlcreatethread.html" | |
| 92 >SDL_CreateThread</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
93 > -- Creates a new thread of execution that shares its parent's properties.</DT |
| 0 | 94 ><DT |
| 95 ><A | |
| 96 HREF="sdlthreadid.html" | |
| 97 >SDL_ThreadID</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
98 > -- Get the 32-bit thread identifier for the current thread.</DT |
| 0 | 99 ><DT |
| 100 ><A | |
| 101 HREF="sdlgetthreadid.html" | |
| 102 >SDL_GetThreadID</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
103 > -- Get the SDL thread ID of a SDL_Thread</DT |
| 0 | 104 ><DT |
| 105 ><A | |
| 106 HREF="sdlwaitthread.html" | |
| 107 >SDL_WaitThread</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
108 > -- Wait for a thread to finish.</DT |
| 0 | 109 ><DT |
| 110 ><A | |
| 111 HREF="sdlkillthread.html" | |
| 112 >SDL_KillThread</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
113 > -- Gracelessly terminates the thread.</DT |
| 0 | 114 ><DT |
| 115 ><A | |
| 116 HREF="sdlcreatemutex.html" | |
| 117 >SDL_CreateMutex</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
118 > -- Create a mutex</DT |
| 0 | 119 ><DT |
| 120 ><A | |
| 121 HREF="sdldestroymutex.html" | |
| 122 >SDL_DestroyMutex</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
123 > -- Destroy a mutex</DT |
| 0 | 124 ><DT |
| 125 ><A | |
| 126 HREF="sdlmutexp.html" | |
| 127 >SDL_mutexP</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
128 > -- Lock a mutex</DT |
| 0 | 129 ><DT |
| 130 ><A | |
| 131 HREF="sdlmutexv.html" | |
| 132 >SDL_mutexV</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
133 > -- Unlock a mutex</DT |
| 0 | 134 ><DT |
| 135 ><A | |
| 136 HREF="sdlcreatesemaphore.html" | |
| 137 >SDL_CreateSemaphore</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
138 > -- Creates a new semaphore and assigns an initial value to it.</DT |
| 0 | 139 ><DT |
| 140 ><A | |
| 141 HREF="sdldestroysemaphore.html" | |
| 142 >SDL_DestroySemaphore</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
143 > -- Destroys a semaphore that was created by <A |
| 0 | 144 HREF="sdlcreatesemaphore.html" |
| 145 >SDL_CreateSemaphore</A | |
| 146 >.</DT | |
| 147 ><DT | |
| 148 ><A | |
| 149 HREF="sdlsemwait.html" | |
| 150 >SDL_SemWait</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
151 > -- Lock a semaphore and suspend the thread if the semaphore value is zero.</DT |
| 0 | 152 ><DT |
| 153 ><A | |
| 154 HREF="sdlsemtrywait.html" | |
| 155 >SDL_SemTryWait</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
156 > -- Attempt to lock a semaphore but don't suspend the thread.</DT |
| 0 | 157 ><DT |
| 158 ><A | |
| 159 HREF="sdlsemwaittimeout.html" | |
| 160 >SDL_SemWaitTimeout</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
161 > -- Lock a semaphore, but only wait up to a specified maximum time.</DT |
| 0 | 162 ><DT |
| 163 ><A | |
| 164 HREF="sdlsempost.html" | |
| 165 >SDL_SemPost</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
166 > -- Unlock a semaphore.</DT |
| 0 | 167 ><DT |
| 168 ><A | |
| 169 HREF="sdlsemvalue.html" | |
| 170 >SDL_SemValue</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
171 > -- Return the current value of a semaphore.</DT |
| 0 | 172 ><DT |
| 173 ><A | |
| 174 HREF="sdlcreatecond.html" | |
| 175 >SDL_CreateCond</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
176 > -- Create a condition variable</DT |
| 0 | 177 ><DT |
| 178 ><A | |
| 179 HREF="sdldestroycond.html" | |
| 180 >SDL_DestroyCond</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
181 > -- Destroy a condition variable</DT |
| 0 | 182 ><DT |
| 183 ><A | |
| 184 HREF="sdlcondsignal.html" | |
| 185 >SDL_CondSignal</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
186 > -- Restart a thread wait on a condition variable</DT |
| 0 | 187 ><DT |
| 188 ><A | |
| 189 HREF="sdlcondbroadcast.html" | |
| 190 >SDL_CondBroadcast</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
191 > -- Restart all threads waiting on a condition variable</DT |
| 0 | 192 ><DT |
| 193 ><A | |
| 194 HREF="sdlcondwait.html" | |
| 195 >SDL_CondWait</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
196 > -- Wait on a condition variable</DT |
| 0 | 197 ><DT |
| 198 ><A | |
| 199 HREF="sdlcondwaittimeout.html" | |
| 200 >SDL_CondWaitTimeout</A | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
201 > -- Wait on a condition variable, with timeout</DT |
| 0 | 202 ></DL |
| 203 ></DIV | |
| 204 ><P | |
| 205 >SDL provides functions for creating threads, mutexes, semphores and condition variables.</P | |
| 206 ><P | |
| 207 >In general, you must be very aware of concurrency and data integrity issues | |
| 208 when writing multi-threaded programs. Some good guidelines include: | |
| 209 <P | |
| 210 ></P | |
| 211 ><UL | |
| 212 ><LI | |
| 213 ><P | |
| 214 >Don't call SDL video/event functions from separate threads</P | |
| 215 ></LI | |
| 216 ><LI | |
| 217 ><P | |
| 218 >Don't use any library functions in separate threads</P | |
| 219 ></LI | |
| 220 ><LI | |
| 221 ><P | |
| 222 >Don't perform any memory management in separate threads</P | |
| 223 ></LI | |
| 224 ><LI | |
| 225 ><P | |
| 226 >Lock global variables which may be accessed by multiple threads</P | |
| 227 ></LI | |
| 228 ><LI | |
| 229 ><P | |
| 230 >Never terminate threads, always set a flag and wait for them to quit</P | |
| 231 ></LI | |
| 232 ><LI | |
| 233 ><P | |
| 234 >Think very carefully about all possible ways your code may interact</P | |
| 235 ></LI | |
| 236 ></UL | |
| 237 ></P | |
| 238 ><DIV | |
| 239 CLASS="NOTE" | |
| 240 ><BLOCKQUOTE | |
| 241 CLASS="NOTE" | |
| 242 ><P | |
| 243 ><B | |
| 244 >Note: </B | |
| 1621 | 245 >SDL's threading is not implemented on MacOS, due to that lack of preemptive thread support (Mac OS X dos nt suffer from this problem)</P |
| 0 | 246 ></BLOCKQUOTE |
| 247 ></DIV | |
| 248 ></DIV | |
| 249 ><DIV | |
| 250 CLASS="NAVFOOTER" | |
| 251 ><HR | |
| 252 ALIGN="LEFT" | |
| 253 WIDTH="100%"><TABLE | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
254 SUMMARY="Footer navigation table" |
| 0 | 255 WIDTH="100%" |
| 256 BORDER="0" | |
| 257 CELLPADDING="0" | |
| 258 CELLSPACING="0" | |
| 259 ><TR | |
| 260 ><TD | |
| 261 WIDTH="33%" | |
| 262 ALIGN="left" | |
| 263 VALIGN="top" | |
| 264 ><A | |
| 265 HREF="sdlcdtrack.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
266 ACCESSKEY="P" |
| 0 | 267 >Prev</A |
| 268 ></TD | |
| 269 ><TD | |
| 270 WIDTH="34%" | |
| 271 ALIGN="center" | |
| 272 VALIGN="top" | |
| 273 ><A | |
| 274 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
275 ACCESSKEY="H" |
| 0 | 276 >Home</A |
| 277 ></TD | |
| 278 ><TD | |
| 279 WIDTH="33%" | |
| 280 ALIGN="right" | |
| 281 VALIGN="top" | |
| 282 ><A | |
| 283 HREF="sdlcreatethread.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
284 ACCESSKEY="N" |
| 0 | 285 >Next</A |
| 286 ></TD | |
| 287 ></TR | |
| 288 ><TR | |
| 289 ><TD | |
| 290 WIDTH="33%" | |
| 291 ALIGN="left" | |
| 292 VALIGN="top" | |
| 293 >SDL_CDtrack</TD | |
| 294 ><TD | |
| 295 WIDTH="34%" | |
| 296 ALIGN="center" | |
| 297 VALIGN="top" | |
| 298 ><A | |
| 299 HREF="reference.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
300 ACCESSKEY="U" |
| 0 | 301 >Up</A |
| 302 ></TD | |
| 303 ><TD | |
| 304 WIDTH="33%" | |
| 305 ALIGN="right" | |
| 306 VALIGN="top" | |
| 307 >SDL_CreateThread</TD | |
| 308 ></TR | |
| 309 ></TABLE | |
| 310 ></DIV | |
| 311 ></BODY | |
| 312 ></HTML | |
| 313 > |