Mercurial > sdl-ios-xcode
annotate docs/html/sdlcreatemutex.html @ 3315:87ffdad11607
Fixed bug #761
Mason Wheeler 2009-07-05 09:28:33 PDT
This patch fixes two issues with SDL_CreateTextureFromSurface.
1. If no renderer is available, the function will return 0 without calling
SDL_SetError. (It does this in other places as well, but it appears that in
these cases, SDL_SetError was already called by a previous function call.)
2. Removal of a dead code block that checks for an impossible return value.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 26 Sep 2009 10:13:44 +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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355632dca928
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parents:
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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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parents:
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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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diff
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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
Updated SDL HTML documentation
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
|
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
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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
|
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 > |