Mercurial > sdl-ios-xcode
annotate docs/html/time.html @ 1795:398ac0f88e4d
Fixed bug #220
The AltiVec blitters don't compile, since they require __VEC__ to be enabled in
order for the compiler to understand "vector" and friends (i.e. do AltiVec)
But you don't want to turn AltiVec on globally, since then the code would only
run on a G4 (there are already runtime tests, before using the AltiVec
variants)
The solution here is to enable AltiVec locally, for the actual AltiVec code.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 09 May 2006 15:09:47 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Time</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="SDL Reference" | |
| 14 HREF="reference.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CondWaitTimeout" | |
| 17 HREF="sdlcondwaittimeout.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_GetTicks" | |
| 20 HREF="sdlgetticks.html"><META | |
| 21 NAME="KEYWORD" | |
| 22 CONTENT="time"><META | |
| 23 NAME="KEYWORD" | |
| 24 CONTENT="function"></HEAD | |
| 25 ><BODY | |
| 26 CLASS="CHAPTER" | |
| 27 BGCOLOR="#FFF8DC" | |
| 28 TEXT="#000000" | |
| 29 LINK="#0000ee" | |
| 30 VLINK="#551a8b" | |
| 31 ALINK="#ff0000" | |
| 32 ><DIV | |
| 33 CLASS="NAVHEADER" | |
| 34 ><TABLE | |
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35 SUMMARY="Header navigation table" |
| 0 | 36 WIDTH="100%" |
| 37 BORDER="0" | |
| 38 CELLPADDING="0" | |
| 39 CELLSPACING="0" | |
| 40 ><TR | |
| 41 ><TH | |
| 42 COLSPAN="3" | |
| 43 ALIGN="center" | |
| 44 >SDL Library Documentation</TH | |
| 45 ></TR | |
| 46 ><TR | |
| 47 ><TD | |
| 48 WIDTH="10%" | |
| 49 ALIGN="left" | |
| 50 VALIGN="bottom" | |
| 51 ><A | |
| 52 HREF="sdlcondwaittimeout.html" | |
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53 ACCESSKEY="P" |
| 0 | 54 >Prev</A |
| 55 ></TD | |
| 56 ><TD | |
| 57 WIDTH="80%" | |
| 58 ALIGN="center" | |
| 59 VALIGN="bottom" | |
| 60 ></TD | |
| 61 ><TD | |
| 62 WIDTH="10%" | |
| 63 ALIGN="right" | |
| 64 VALIGN="bottom" | |
| 65 ><A | |
| 66 HREF="sdlgetticks.html" | |
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67 ACCESSKEY="N" |
| 0 | 68 >Next</A |
| 69 ></TD | |
| 70 ></TR | |
| 71 ></TABLE | |
| 72 ><HR | |
| 73 ALIGN="LEFT" | |
| 74 WIDTH="100%"></DIV | |
| 75 ><DIV | |
| 76 CLASS="CHAPTER" | |
| 77 ><H1 | |
| 78 ><A | |
| 79 NAME="TIME" | |
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80 ></A |
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81 >Chapter 13. Time</H1 |
| 0 | 82 ><DIV |
| 83 CLASS="TOC" | |
| 84 ><DL | |
| 85 ><DT | |
| 86 ><B | |
| 87 >Table of Contents</B | |
| 88 ></DT | |
| 89 ><DT | |
| 90 ><A | |
| 91 HREF="sdlgetticks.html" | |
| 92 >SDL_GetTicks</A | |
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93 > -- Get the number of milliseconds since the SDL library initialization.</DT |
| 0 | 94 ><DT |
| 95 ><A | |
| 96 HREF="sdldelay.html" | |
| 97 >SDL_Delay</A | |
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98 > -- Wait a specified number of milliseconds before returning.</DT |
| 0 | 99 ><DT |
| 100 ><A | |
| 101 HREF="sdladdtimer.html" | |
| 102 >SDL_AddTimer</A | |
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103 > -- Add a timer which will call a callback after the specified number of milliseconds has |
| 0 | 104 elapsed.</DT |
| 105 ><DT | |
| 106 ><A | |
| 107 HREF="sdlremovetimer.html" | |
| 108 >SDL_RemoveTimer</A | |
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109 > -- Remove a timer which was added with |
| 0 | 110 <A |
| 111 HREF="sdladdtimer.html" | |
| 112 >SDL_AddTimer</A | |
| 113 >.</DT | |
| 114 ><DT | |
| 115 ><A | |
| 116 HREF="sdlsettimer.html" | |
| 117 >SDL_SetTimer</A | |
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118 > -- Set a callback to run after the specified number of milliseconds has |
| 0 | 119 elapsed.</DT |
| 120 ></DL | |
| 121 ></DIV | |
| 122 ><P | |
| 123 >SDL provides several cross-platform functions for dealing with time. | |
| 124 It provides a way to get the current time, a way to wait a little while, | |
| 125 and a simple timer mechanism. These functions give you two ways of moving an | |
| 126 object every x milliseconds: | |
| 127 | |
| 128 <P | |
| 129 ></P | |
| 130 ><UL | |
| 131 ><LI | |
| 132 ><P | |
| 133 >Use a timer callback function. This may have the bad effect that it runs in a seperate thread or uses alarm signals, but it's easier to implement.</P | |
| 134 ></LI | |
| 135 ><LI | |
| 136 ><P | |
| 137 >Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P | |
| 138 ></LI | |
| 139 ></UL | |
| 140 > </P | |
| 141 ></DIV | |
| 142 ><DIV | |
| 143 CLASS="NAVFOOTER" | |
| 144 ><HR | |
| 145 ALIGN="LEFT" | |
| 146 WIDTH="100%"><TABLE | |
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147 SUMMARY="Footer navigation table" |
| 0 | 148 WIDTH="100%" |
| 149 BORDER="0" | |
| 150 CELLPADDING="0" | |
| 151 CELLSPACING="0" | |
| 152 ><TR | |
| 153 ><TD | |
| 154 WIDTH="33%" | |
| 155 ALIGN="left" | |
| 156 VALIGN="top" | |
| 157 ><A | |
| 158 HREF="sdlcondwaittimeout.html" | |
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159 ACCESSKEY="P" |
| 0 | 160 >Prev</A |
| 161 ></TD | |
| 162 ><TD | |
| 163 WIDTH="34%" | |
| 164 ALIGN="center" | |
| 165 VALIGN="top" | |
| 166 ><A | |
| 167 HREF="index.html" | |
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168 ACCESSKEY="H" |
| 0 | 169 >Home</A |
| 170 ></TD | |
| 171 ><TD | |
| 172 WIDTH="33%" | |
| 173 ALIGN="right" | |
| 174 VALIGN="top" | |
| 175 ><A | |
| 176 HREF="sdlgetticks.html" | |
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parents:
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177 ACCESSKEY="N" |
| 0 | 178 >Next</A |
| 179 ></TD | |
| 180 ></TR | |
| 181 ><TR | |
| 182 ><TD | |
| 183 WIDTH="33%" | |
| 184 ALIGN="left" | |
| 185 VALIGN="top" | |
| 186 >SDL_CondWaitTimeout</TD | |
| 187 ><TD | |
| 188 WIDTH="34%" | |
| 189 ALIGN="center" | |
| 190 VALIGN="top" | |
| 191 ><A | |
| 192 HREF="reference.html" | |
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parents:
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193 ACCESSKEY="U" |
| 0 | 194 >Up</A |
| 195 ></TD | |
| 196 ><TD | |
| 197 WIDTH="33%" | |
| 198 ALIGN="right" | |
| 199 VALIGN="top" | |
| 200 >SDL_GetTicks</TD | |
| 201 ></TR | |
| 202 ></TABLE | |
| 203 ></DIV | |
| 204 ></BODY | |
| 205 ></HTML | |
| 206 > |