Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreatemutex.html @ 1585:980d2a0dc2a3
Date: Tue, 4 Mar 2003 15:05:31 -0800
From: "Jim"
Subject: [SDL] Frame Buffer patches...
Okay I'm new at patch generation - so please tell me if there's a better way
I could have done this.
Attached are two patch files generated with 'cvs diff -u'
SDL-fb-open-lock.patch applies to SDL_fbvideo.c
Modifies the open loop to check /dev/fb/0 found on devfs...
Modifies the lock code to return failure if the current virtual terminal
is not the one opened for frame buffer writing...
Lock would hang forever if switched away (ctrl-alt-F1) ...
SDL-fb-mousedrv-screensave.patch applies to SDL_fbevents.c
Switches default mouse mode based on SDL_MOUSEDRV - currently only
accepts PS2 - otherwise default is MS Mouse.
When the screen is switched - exisiting code (wrapped in ifdef
SAVE_SCREEN_COTENTS) would save the wrong bit of the screen....
( I run frame buffer 1600x1200, the size I requested was 800x600 - the
save would save the top 800 lines (non biased) and restore them... Adding
screen->offset fixed that )
However, if that option is not set, then a call to SDL_UpdateRect (full
screen) is made. (which may have had it's contents changed since the screen
is not entirely locked because of lock-failure patch)
Jim
[patches slightly tweaked for SDL 1.2.10]
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 22 Mar 2006 07:48:22 +0000 |
parents | 355632dca928 |
children |
rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_CreateMutex</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_KillThread" | |
17 HREF="sdlkillthread.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_DestroyMutex" | |
20 HREF="sdldestroymutex.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="sdlkillthread.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="sdldestroymutex.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="SDLCREATEMUTEX" | |
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74 ></A |
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75 >SDL_CreateMutex</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN7820" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_CreateMutex -- Create a mutex</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN7823" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN7824" |
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 >SDL_mutex *<B | |
107 CLASS="FSFUNC" | |
108 >SDL_CreateMutex</B | |
109 ></CODE | |
110 >(void);</CODE | |
111 ></P | |
112 ><P | |
113 ></P | |
114 ></DIV | |
115 ></DIV | |
116 ><DIV | |
117 CLASS="REFSECT1" | |
118 ><A | |
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119 NAME="AEN7830" |
0 | 120 ></A |
121 ><H2 | |
122 >Description</H2 | |
123 ><P | |
124 >Create a new, unlocked mutex.</P | |
125 ></DIV | |
126 ><DIV | |
127 CLASS="REFSECT1" | |
128 ><A | |
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129 NAME="AEN7833" |
0 | 130 ></A |
131 ><H2 | |
132 >Examples</H2 | |
133 ><PRE | |
134 CLASS="PROGRAMLISTING" | |
135 >SDL_mutex *mut; | |
136 | |
137 mut=SDL_CreateMutex(); | |
138 . | |
139 . | |
140 if(SDL_mutexP(mut)==-1){ | |
141 fprintf(stderr, "Couldn't lock mutex\n"); | |
142 exit(-1); | |
143 } | |
144 . | |
145 /* Do stuff while mutex is locked */ | |
146 . | |
147 . | |
148 if(SDL_mutexV(mut)==-1){ | |
149 fprintf(stderr, "Couldn't unlock mutex\n"); | |
150 exit(-1); | |
151 } | |
152 | |
153 SDL_DestroyMutex(mut); </PRE | |
154 ></DIV | |
155 ><DIV | |
156 CLASS="REFSECT1" | |
157 ><A | |
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158 NAME="AEN7836" |
0 | 159 ></A |
160 ><H2 | |
161 >See Also</H2 | |
162 ><P | |
163 ><A | |
164 HREF="sdlmutexp.html" | |
165 ><TT | |
166 CLASS="FUNCTION" | |
167 >SDL_mutexP</TT | |
168 ></A | |
169 >, | |
170 <A | |
171 HREF="sdlmutexv.html" | |
172 ><TT | |
173 CLASS="FUNCTION" | |
174 >SDL_mutexV</TT | |
175 ></A | |
176 >, | |
177 <A | |
178 HREF="sdldestroymutex.html" | |
179 ><TT | |
180 CLASS="FUNCTION" | |
181 >SDL_DestroyMutex</TT | |
182 ></A | |
183 ></P | |
184 ></DIV | |
185 ><DIV | |
186 CLASS="NAVFOOTER" | |
187 ><HR | |
188 ALIGN="LEFT" | |
189 WIDTH="100%"><TABLE | |
803
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190 SUMMARY="Footer navigation table" |
0 | 191 WIDTH="100%" |
192 BORDER="0" | |
193 CELLPADDING="0" | |
194 CELLSPACING="0" | |
195 ><TR | |
196 ><TD | |
197 WIDTH="33%" | |
198 ALIGN="left" | |
199 VALIGN="top" | |
200 ><A | |
201 HREF="sdlkillthread.html" | |
803
355632dca928
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parents:
181
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202 ACCESSKEY="P" |
0 | 203 >Prev</A |
204 ></TD | |
205 ><TD | |
206 WIDTH="34%" | |
207 ALIGN="center" | |
208 VALIGN="top" | |
209 ><A | |
210 HREF="index.html" | |
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parents:
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211 ACCESSKEY="H" |
0 | 212 >Home</A |
213 ></TD | |
214 ><TD | |
215 WIDTH="33%" | |
216 ALIGN="right" | |
217 VALIGN="top" | |
218 ><A | |
219 HREF="sdldestroymutex.html" | |
803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
181
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220 ACCESSKEY="N" |
0 | 221 >Next</A |
222 ></TD | |
223 ></TR | |
224 ><TR | |
225 ><TD | |
226 WIDTH="33%" | |
227 ALIGN="left" | |
228 VALIGN="top" | |
229 >SDL_KillThread</TD | |
230 ><TD | |
231 WIDTH="34%" | |
232 ALIGN="center" | |
233 VALIGN="top" | |
234 ><A | |
235 HREF="thread.html" | |
803
355632dca928
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parents:
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236 ACCESSKEY="U" |
0 | 237 >Up</A |
238 ></TD | |
239 ><TD | |
240 WIDTH="33%" | |
241 ALIGN="right" | |
242 VALIGN="top" | |
243 >SDL_DestroyMutex</TD | |
244 ></TR | |
245 ></TABLE | |
246 ></DIV | |
247 ></BODY | |
248 ></HTML | |
249 > |