Mercurial > sdl-ios-xcode
annotate docs/html/sdlcondwait.html @ 4355:9b464226e541 SDL-1.2
Fixed bug #855
Ludwig Nussel 2009-10-18 06:31:52 PDT
an mprotect call was added to fix bug 528. However that results in a buffer
that allows writing and code execution. Ie the no-execute security features of
modern operating systems are defeated this way. Two mprotect calls are needed.
One to make the buffer executable but not writeable when done and another one
to make the buffer writeable again if the content needs to be changed.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 18 Oct 2009 17:31:37 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_CondWait</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_CondBroadcast" | |
| 17 HREF="sdlcondbroadcast.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CondWaitTimeout" | |
| 20 HREF="sdlcondwaittimeout.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="sdlcondbroadcast.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="sdlcondwaittimeout.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="SDLCONDWAIT" | |
|
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74 ></A |
|
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75 >SDL_CondWait</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN8364" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_CondWait -- Wait on a condition variable</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN8367" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN8368" |
| 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 >int <B | |
| 107 CLASS="FSFUNC" | |
| 108 >SDL_CondWait</B | |
| 109 ></CODE | |
| 110 >(SDL_cond *cond, SDL_mutex *mut);</CODE | |
| 111 ></P | |
| 112 ><P | |
| 113 ></P | |
| 114 ></DIV | |
| 115 ></DIV | |
| 116 ><DIV | |
| 117 CLASS="REFSECT1" | |
| 118 ><A | |
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119 NAME="AEN8374" |
| 0 | 120 ></A |
| 121 ><H2 | |
| 122 >Description</H2 | |
| 123 ><P | |
| 124 >Wait on the condition variable <TT | |
| 125 CLASS="PARAMETER" | |
| 126 ><I | |
| 127 >cond</I | |
| 128 ></TT | |
| 129 > and unlock the provided mutex. The mutex must the locked before entering this function. Returns <SPAN | |
| 130 CLASS="RETURNVALUE" | |
| 131 >0</SPAN | |
| 132 > when it is signalled, or <SPAN | |
| 133 CLASS="RETURNVALUE" | |
| 134 >-1</SPAN | |
| 135 > on an error.</P | |
| 136 ></DIV | |
| 137 ><DIV | |
| 138 CLASS="REFSECT1" | |
| 139 ><A | |
|
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140 NAME="AEN8380" |
| 0 | 141 ></A |
| 142 ><H2 | |
| 143 >See Also</H2 | |
| 144 ><P | |
| 145 ><A | |
| 146 HREF="sdlcondwaittimeout.html" | |
| 147 ><TT | |
| 148 CLASS="FUNCTION" | |
| 149 >SDL_CondWaitTimeout</TT | |
| 150 ></A | |
| 151 >, | |
| 152 <A | |
| 153 HREF="sdlcondsignal.html" | |
| 154 ><TT | |
| 155 CLASS="FUNCTION" | |
| 156 >SDL_CondSignal</TT | |
| 157 ></A | |
| 158 >, | |
| 159 <A | |
| 160 HREF="sdlmutexp.html" | |
| 161 ><TT | |
| 162 CLASS="FUNCTION" | |
| 163 >SDL_mutexP</TT | |
| 164 ></A | |
| 165 ></P | |
| 166 ></DIV | |
| 167 ><DIV | |
| 168 CLASS="NAVFOOTER" | |
| 169 ><HR | |
| 170 ALIGN="LEFT" | |
| 171 WIDTH="100%"><TABLE | |
|
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parents:
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172 SUMMARY="Footer navigation table" |
| 0 | 173 WIDTH="100%" |
| 174 BORDER="0" | |
| 175 CELLPADDING="0" | |
| 176 CELLSPACING="0" | |
| 177 ><TR | |
| 178 ><TD | |
| 179 WIDTH="33%" | |
| 180 ALIGN="left" | |
| 181 VALIGN="top" | |
| 182 ><A | |
| 183 HREF="sdlcondbroadcast.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
184 ACCESSKEY="P" |
| 0 | 185 >Prev</A |
| 186 ></TD | |
| 187 ><TD | |
| 188 WIDTH="34%" | |
| 189 ALIGN="center" | |
| 190 VALIGN="top" | |
| 191 ><A | |
| 192 HREF="index.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
193 ACCESSKEY="H" |
| 0 | 194 >Home</A |
| 195 ></TD | |
| 196 ><TD | |
| 197 WIDTH="33%" | |
| 198 ALIGN="right" | |
| 199 VALIGN="top" | |
| 200 ><A | |
| 201 HREF="sdlcondwaittimeout.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
202 ACCESSKEY="N" |
| 0 | 203 >Next</A |
| 204 ></TD | |
| 205 ></TR | |
| 206 ><TR | |
| 207 ><TD | |
| 208 WIDTH="33%" | |
| 209 ALIGN="left" | |
| 210 VALIGN="top" | |
| 211 >SDL_CondBroadcast</TD | |
| 212 ><TD | |
| 213 WIDTH="34%" | |
| 214 ALIGN="center" | |
| 215 VALIGN="top" | |
| 216 ><A | |
| 217 HREF="thread.html" | |
|
803
355632dca928
Updated SDL HTML documentation
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
218 ACCESSKEY="U" |
| 0 | 219 >Up</A |
| 220 ></TD | |
| 221 ><TD | |
| 222 WIDTH="33%" | |
| 223 ALIGN="right" | |
| 224 VALIGN="top" | |
| 225 >SDL_CondWaitTimeout</TD | |
| 226 ></TR | |
| 227 ></TABLE | |
| 228 ></DIV | |
| 229 ></BODY | |
| 230 ></HTML | |
| 231 > |