Mercurial > sdl-ios-xcode
annotate docs/html/guidetimeexamples.html @ 1166:da33b7e6d181
Date: Tue, 1 Nov 2005 20:25:10 +0100
From: Dirk Mueller
Subject: [PATCH] build SDL with nonexecutable stack
libSDL is by default marked with an executable stack, which it doesn't
actually need. the reason for this is that there are assembler files in the
source tree not properly annotated with the "noexec stack" section. As such
the linker does a safe-fallback and marks the whole lib as "requires
executable stack".
the patch below removes this by adding annotations. As far as I can see it
shouldn't break anything.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 01 Nov 2005 23:19:59 +0000 |
| parents | 355632dca928 |
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| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >Time Examples</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="Examples" | |
| 14 HREF="guideexamples.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="CDROM Examples" | |
| 17 HREF="guidecdromexamples.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL Reference" | |
| 20 HREF="reference.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="SECT1" | |
| 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="guidecdromexamples.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 >Chapter 4. Examples</TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="reference.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 ><DIV | |
| 72 CLASS="SECT1" | |
| 73 ><H1 | |
| 74 CLASS="SECT1" | |
| 75 ><A | |
| 76 NAME="GUIDETIMEEXAMPLES" | |
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77 ></A |
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78 >Time Examples</H1 |
| 0 | 79 ><P |
| 80 ></P | |
| 81 ><DIV | |
| 82 CLASS="SECT2" | |
| 83 ><H2 | |
| 84 CLASS="SECT2" | |
| 85 ><A | |
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86 NAME="AEN412" |
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87 ></A |
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88 >Time based game loop</H2 |
| 0 | 89 ><P |
| 90 ><PRE | |
| 91 CLASS="PROGRAMLISTING" | |
| 92 >#define TICK_INTERVAL 30 | |
| 93 | |
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94 static Uint32 next_time; |
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95 |
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96 Uint32 time_left(void) |
| 0 | 97 { |
| 98 Uint32 now; | |
| 99 | |
| 100 now = SDL_GetTicks(); | |
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101 if(next_time <= now) |
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102 return 0; |
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103 else |
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104 return next_time - now; |
| 0 | 105 } |
| 106 | |
| 107 | |
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108 /* main game loop */ |
| 0 | 109 |
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110 next_time = SDL_GetTicks() + TICK_INTERVAL; |
| 0 | 111 while ( game_running ) { |
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112 update_game_state(); |
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113 SDL_Delay(time_left()); |
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114 next_time += TICK_INTERVAL; |
| 0 | 115 } </PRE |
| 116 ></P | |
| 117 ></DIV | |
| 118 ></DIV | |
| 119 ><DIV | |
| 120 CLASS="NAVFOOTER" | |
| 121 ><HR | |
| 122 ALIGN="LEFT" | |
| 123 WIDTH="100%"><TABLE | |
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124 SUMMARY="Footer navigation table" |
| 0 | 125 WIDTH="100%" |
| 126 BORDER="0" | |
| 127 CELLPADDING="0" | |
| 128 CELLSPACING="0" | |
| 129 ><TR | |
| 130 ><TD | |
| 131 WIDTH="33%" | |
| 132 ALIGN="left" | |
| 133 VALIGN="top" | |
| 134 ><A | |
| 135 HREF="guidecdromexamples.html" | |
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136 ACCESSKEY="P" |
| 0 | 137 >Prev</A |
| 138 ></TD | |
| 139 ><TD | |
| 140 WIDTH="34%" | |
| 141 ALIGN="center" | |
| 142 VALIGN="top" | |
| 143 ><A | |
| 144 HREF="index.html" | |
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145 ACCESSKEY="H" |
| 0 | 146 >Home</A |
| 147 ></TD | |
| 148 ><TD | |
| 149 WIDTH="33%" | |
| 150 ALIGN="right" | |
| 151 VALIGN="top" | |
| 152 ><A | |
| 153 HREF="reference.html" | |
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154 ACCESSKEY="N" |
| 0 | 155 >Next</A |
| 156 ></TD | |
| 157 ></TR | |
| 158 ><TR | |
| 159 ><TD | |
| 160 WIDTH="33%" | |
| 161 ALIGN="left" | |
| 162 VALIGN="top" | |
| 163 >CDROM Examples</TD | |
| 164 ><TD | |
| 165 WIDTH="34%" | |
| 166 ALIGN="center" | |
| 167 VALIGN="top" | |
| 168 ><A | |
| 169 HREF="guideexamples.html" | |
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170 ACCESSKEY="U" |
| 0 | 171 >Up</A |
| 172 ></TD | |
| 173 ><TD | |
| 174 WIDTH="33%" | |
| 175 ALIGN="right" | |
| 176 VALIGN="top" | |
| 177 >SDL Reference</TD | |
| 178 ></TR | |
| 179 ></TABLE | |
| 180 ></DIV | |
| 181 ></BODY | |
| 182 ></HTML | |
| 183 > |