Mercurial > sdl-ios-xcode
annotate docs/html/sdlpushevent.html @ 1157:baf35853ad54
Date: Mon, 10 Oct 2005 13:09:32 +0300
From: Tommi Kyntola <tommi.kyntola@ray.fi>
To: sdl@libsdl.org
Subject: [SDL] [RFC] get_ticks broken on linux
It uses gettimeofday to calculate the timedifference.
Gettimeofday returns current time which is seldom monotonous.
This breaks SDL timer subsystem. (time callbacks and all that
get borked when the time difference ms is suddenly ~ 2^32)
I posted a message about this earlier but got no response.
Some thoughts on this matter would be appreciated.
(Or even an explanation for the lack of interest.)
A patch below would use the posix timers that have been around
since posix 93 and do provide a good source of monotonous time
on linux boxes (and on few others too).
The following patch is also availabe at:
http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch
It's against 1.2.9, but I can easily rediffit against
the cvs branch is needed.
cheers,
Tommi Kyntola tommi.kyntola@ray.fi
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Tue, 11 Oct 2005 18:16:12 +0000 |
| parents | 355632dca928 |
| children |
| 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 > |