Mercurial > sdl-ios-xcode
annotate docs/html/thread.html @ 2884:9dde605c7540
Date: Fri, 19 Dec 2008 20:17:35 +0100
From: Couriersud
Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions
> For consistency you'd probably want:
> SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a);
> SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode);
> SDL_RenderLine(int x1, int y1, int x2, int y2);
> SDL_RenderFill(SDL_Rect *rect);
>
> You probably also want to add API functions query the current state.
>
I have implemented the above api for the opengl, x11, directfb and
software renderers. I have also renamed *TEXTUREBLENDMODE* constants to
BLENDMODE*. The unix build compiles. The windows renderer still needs to
be updated, but I have no windows development machine at hand. Have a
look at the x11 renderer for a sample.
Vector games now run at 90% both on opengl and directfb in comparison to
sdlmame's own opengl renderer. The same applies to raster games.
The diff also includes
a) Changed XDrawRect to XFillRect in x11 renderer
b) A number of changes to fix blending and modulation issues in the
directfb renderer.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sat, 20 Dec 2008 12:00:00 +0000 |
parents | f12379c41042 |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >Multi-threaded Programming</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="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 | |
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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" | |
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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" | |
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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" | |
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80 ></A |
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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 | |
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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 | |
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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 | |
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103 > -- Get the SDL thread ID of a SDL_Thread</DT |
0 | 104 ><DT |
105 ><A | |
106 HREF="sdlwaitthread.html" | |
107 >SDL_WaitThread</A | |
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108 > -- Wait for a thread to finish.</DT |
0 | 109 ><DT |
110 ><A | |
111 HREF="sdlkillthread.html" | |
112 >SDL_KillThread</A | |
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113 > -- Gracelessly terminates the thread.</DT |
0 | 114 ><DT |
115 ><A | |
116 HREF="sdlcreatemutex.html" | |
117 >SDL_CreateMutex</A | |
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118 > -- Create a mutex</DT |
0 | 119 ><DT |
120 ><A | |
121 HREF="sdldestroymutex.html" | |
122 >SDL_DestroyMutex</A | |
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123 > -- Destroy a mutex</DT |
0 | 124 ><DT |
125 ><A | |
126 HREF="sdlmutexp.html" | |
127 >SDL_mutexP</A | |
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128 > -- Lock a mutex</DT |
0 | 129 ><DT |
130 ><A | |
131 HREF="sdlmutexv.html" | |
132 >SDL_mutexV</A | |
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133 > -- Unlock a mutex</DT |
0 | 134 ><DT |
135 ><A | |
136 HREF="sdlcreatesemaphore.html" | |
137 >SDL_CreateSemaphore</A | |
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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 | |
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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 | |
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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 | |
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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 | |
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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 | |
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166 > -- Unlock a semaphore.</DT |
0 | 167 ><DT |
168 ><A | |
169 HREF="sdlsemvalue.html" | |
170 >SDL_SemValue</A | |
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171 > -- Return the current value of a semaphore.</DT |
0 | 172 ><DT |
173 ><A | |
174 HREF="sdlcreatecond.html" | |
175 >SDL_CreateCond</A | |
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176 > -- Create a condition variable</DT |
0 | 177 ><DT |
178 ><A | |
179 HREF="sdldestroycond.html" | |
180 >SDL_DestroyCond</A | |
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181 > -- Destroy a condition variable</DT |
0 | 182 ><DT |
183 ><A | |
184 HREF="sdlcondsignal.html" | |
185 >SDL_CondSignal</A | |
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186 > -- Restart a thread wait on a condition variable</DT |
0 | 187 ><DT |
188 ><A | |
189 HREF="sdlcondbroadcast.html" | |
190 >SDL_CondBroadcast</A | |
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191 > -- Restart all threads waiting on a condition variable</DT |
0 | 192 ><DT |
193 ><A | |
194 HREF="sdlcondwait.html" | |
195 >SDL_CondWait</A | |
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196 > -- Wait on a condition variable</DT |
0 | 197 ><DT |
198 ><A | |
199 HREF="sdlcondwaittimeout.html" | |
200 >SDL_CondWaitTimeout</A | |
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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 | |
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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" | |
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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" | |
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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" | |
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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" | |
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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 > |