Mercurial > sdl-ios-xcode
annotate docs/html/sdlpushevent.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> |
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date | Sun, 18 Oct 2009 17:31:37 +0000 |
parents | 355632dca928 |
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rev | line source |
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0 | 1 <HTML |
2 ><HEAD | |
3 ><TITLE | |
4 >SDL_PushEvent</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="Event Functions." | |
14 HREF="eventfunctions.html"><LINK | |
15 REL="PREVIOUS" | |
16 TITLE="SDL_WaitEvent" | |
17 HREF="sdlwaitevent.html"><LINK | |
18 REL="NEXT" | |
19 TITLE="SDL_SetEventFilter" | |
20 HREF="sdlseteventfilter.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="sdlwaitevent.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="sdlseteventfilter.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="SDLPUSHEVENT" | |
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74 ></A |
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75 >SDL_PushEvent</H1 |
0 | 76 ><DIV |
77 CLASS="REFNAMEDIV" | |
78 ><A | |
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79 NAME="AEN5536" |
0 | 80 ></A |
81 ><H2 | |
82 >Name</H2 | |
83 >SDL_PushEvent -- Pushes an event onto the event queue</DIV | |
84 ><DIV | |
85 CLASS="REFSYNOPSISDIV" | |
86 ><A | |
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87 NAME="AEN5539" |
0 | 88 ></A |
89 ><H2 | |
90 >Synopsis</H2 | |
91 ><DIV | |
92 CLASS="FUNCSYNOPSIS" | |
93 ><A | |
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94 NAME="AEN5540" |
0 | 95 ></A |
96 ><P | |
97 ></P | |
98 ><PRE | |
99 CLASS="FUNCSYNOPSISINFO" | |
100 >#include "SDL.h"</PRE | |
101 ><P | |
102 ><CODE | |
103 ><CODE | |
104 CLASS="FUNCDEF" | |
105 >int <B | |
106 CLASS="FSFUNC" | |
107 >SDL_PushEvent</B | |
108 ></CODE | |
109 >(SDL_Event *event);</CODE | |
110 ></P | |
111 ><P | |
112 ></P | |
113 ></DIV | |
114 ></DIV | |
115 ><DIV | |
116 CLASS="REFSECT1" | |
117 ><A | |
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118 NAME="AEN5546" |
0 | 119 ></A |
120 ><H2 | |
121 >Description</H2 | |
122 ><P | |
123 >The event queue can actually be used as a two way communication channel. Not only can events be read from the queue, but the user can also push their own events onto it. <TT | |
124 CLASS="PARAMETER" | |
125 ><I | |
126 >event</I | |
127 ></TT | |
128 > is a pointer to the event structure you wish to push onto the queue.</P | |
129 ><DIV | |
130 CLASS="NOTE" | |
131 ><BLOCKQUOTE | |
132 CLASS="NOTE" | |
133 ><P | |
134 ><B | |
135 >Note: </B | |
136 >Pushing device input events onto the queue doesn't modify the state of the device within SDL.</P | |
137 ></BLOCKQUOTE | |
138 ></DIV | |
139 ></DIV | |
140 ><DIV | |
141 CLASS="REFSECT1" | |
142 ><A | |
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143 NAME="AEN5552" |
0 | 144 ></A |
145 ><H2 | |
146 >Return Value</H2 | |
147 ><P | |
148 >Returns <SPAN | |
149 CLASS="RETURNVALUE" | |
150 >0</SPAN | |
151 > on success or <SPAN | |
152 CLASS="RETURNVALUE" | |
153 >-1</SPAN | |
154 > if the event couldn't be pushed.</P | |
155 ></DIV | |
156 ><DIV | |
157 CLASS="REFSECT1" | |
158 ><A | |
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159 NAME="AEN5557" |
0 | 160 ></A |
161 ><H2 | |
162 >Examples</H2 | |
163 ><P | |
164 >See <A | |
165 HREF="sdlevent.html" | |
166 ><SPAN | |
167 CLASS="STRUCTNAME" | |
168 >SDL_Event</SPAN | |
169 ></A | |
170 >.</P | |
171 ></DIV | |
172 ><DIV | |
173 CLASS="REFSECT1" | |
174 ><A | |
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175 NAME="AEN5562" |
0 | 176 ></A |
177 ><H2 | |
178 >See Also</H2 | |
179 ><P | |
180 ><A | |
181 HREF="sdlpollevent.html" | |
182 ><TT | |
183 CLASS="FUNCTION" | |
184 >SDL_PollEvent</TT | |
185 ></A | |
186 >, | |
187 <A | |
188 HREF="sdlpeepevents.html" | |
189 ><TT | |
190 CLASS="FUNCTION" | |
191 >SDL_PeepEvents</TT | |
192 ></A | |
193 >, | |
194 <A | |
195 HREF="sdlevent.html" | |
196 ><SPAN | |
197 CLASS="STRUCTNAME" | |
198 >SDL_Event</SPAN | |
199 ></A | |
200 ></P | |
201 ></DIV | |
202 ><DIV | |
203 CLASS="NAVFOOTER" | |
204 ><HR | |
205 ALIGN="LEFT" | |
206 WIDTH="100%"><TABLE | |
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207 SUMMARY="Footer navigation table" |
0 | 208 WIDTH="100%" |
209 BORDER="0" | |
210 CELLPADDING="0" | |
211 CELLSPACING="0" | |
212 ><TR | |
213 ><TD | |
214 WIDTH="33%" | |
215 ALIGN="left" | |
216 VALIGN="top" | |
217 ><A | |
218 HREF="sdlwaitevent.html" | |
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219 ACCESSKEY="P" |
0 | 220 >Prev</A |
221 ></TD | |
222 ><TD | |
223 WIDTH="34%" | |
224 ALIGN="center" | |
225 VALIGN="top" | |
226 ><A | |
227 HREF="index.html" | |
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228 ACCESSKEY="H" |
0 | 229 >Home</A |
230 ></TD | |
231 ><TD | |
232 WIDTH="33%" | |
233 ALIGN="right" | |
234 VALIGN="top" | |
235 ><A | |
236 HREF="sdlseteventfilter.html" | |
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237 ACCESSKEY="N" |
0 | 238 >Next</A |
239 ></TD | |
240 ></TR | |
241 ><TR | |
242 ><TD | |
243 WIDTH="33%" | |
244 ALIGN="left" | |
245 VALIGN="top" | |
246 >SDL_WaitEvent</TD | |
247 ><TD | |
248 WIDTH="34%" | |
249 ALIGN="center" | |
250 VALIGN="top" | |
251 ><A | |
252 HREF="eventfunctions.html" | |
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253 ACCESSKEY="U" |
0 | 254 >Up</A |
255 ></TD | |
256 ><TD | |
257 WIDTH="33%" | |
258 ALIGN="right" | |
259 VALIGN="top" | |
260 >SDL_SetEventFilter</TD | |
261 ></TR | |
262 ></TABLE | |
263 ></DIV | |
264 ></BODY | |
265 ></HTML | |
266 > |