Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreatemutex.html @ 816:428f688f2ad2
Date: Fri, 13 Feb 2004 17:03:16 +0100
From: Max Horn
Subject: Modifier key fix
The internal modifier state can get out of sync with reality. To
trigger this, do for example this:
1) Launch an SDL app
2) Alt-click on the desktop (this will hide the SDL app).
3) Bring the SDL app back to the front
4) SDL will still think alt is pressed (and as such will treat left
clicks like middle clicks). If you press and release alt, it'll be fine
again.
The attached patch cures this by rechecking the modifier state whenever
we process an event.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 13 Feb 2004 17:57:16 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 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 | |
|
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parents:
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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" | |
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803
355632dca928
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Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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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" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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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" | |
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803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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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
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
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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 > |