Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreatemutex.html @ 4106:12bb6311fd5d SDL-1.2
Hans de Goede fixed bug #495
When running boswars: http://www.boswars.org/ on a machine with intel
integrathed graphics it crashes when it tries to play the initial theora
splashscreen video:
X Error of failed request: BadAlloc (insufficient resources for operation)
Major opcode of failed request: 140 (XVideo)
Minor opcode of failed request: 19 ()
Serial number of failed request: 25
Current serial number in output stream: 26
boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed.
Aborted
I recognized this problem from a few years back, when I encountered it while
working on the Xv blitter for xmame. The problem is that for some reason
creation the Xvport and XvImage succeeds, and failure (lack of resources / hw
capability?) is only indicated during the first XvPut[Shm]Image. I've written a
patch for SDL using the work around for this I developed for xmame (and which
is still used successfully in xmame after many years of usage).
I'll admit it isn't very pretty, but after investigating several possibilities
this was the best option, any other fixes would need changes to the SDL api and
abi.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 29 Dec 2007 02:23:48 +0000 |
parents | 355632dca928 |
children |
rev | line source |
---|---|
0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_CreateMutex</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="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 | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
74 ></A |
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
75 >SDL_CreateMutex</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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 | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
87 NAME="AEN7823" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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 | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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 | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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 | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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" | |
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
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 > |