annotate docs/html/sdlsempost.html @ 172:37e3ca9254c7

Date: Sat, 8 Sep 2001 04:42:23 +0200 From: Max Horn <max@quendi.de> Subject: SDL/OSX: Joystick; Better key handling I just finished implementing improved keyhandling for OS X (in fact the code should be easily ported to the "normal" MacOS part of SDL, I just had no chance yet). Works like this: First init the mapping table statically like before. Them, it queries the OS for the "official" key table, then iterates over all 127 scancode and gets the associates ascii code. It ignores everythng below 32 (has to, as it would lead to many problems if we did not... e.g. both ESC and NUM LOCk produce an ascii code 27 on my keyboard), and all stuff above 127 is mapped to SDLK_WORLD_* simply in the order it is encountered. In addition, caps lock is now working, too. The code work flawless for me, but since I only have one keyboard, I may have not encountered some serious problem... but I am pretty confident that it is better than the old code in most cases. The joystick driver works fine for me, too. I think it can be added to CVS already. It would simply be helpful if more people would test it. Hm, I wonder if Maelstrom or GLTron has Joystick support? That would be a wonderful test application :) I also took the liberty of modifying some text files like BUGS, README.CVS, README.MacOSX (which now contains the OS X docs I long promised)
author Sam Lantinga <slouken@libsdl.org>
date Tue, 11 Sep 2001 19:00:18 +0000
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9 REL="HOME"
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38 ALIGN="center"
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39 >SDL Library Documentation</TH
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40 ></TR
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46 ><A
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47 HREF="sdlsemwaittimeout.html"
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48 >Prev</A
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49 ></TD
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60 HREF="sdlsemvalue.html"
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61 >Next</A
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62 ></TD
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68 ><H1
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69 ><A
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70 NAME="SDLSEMPOST"
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71 >SDL_SemPost</A
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72 ></H1
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74 CLASS="REFNAMEDIV"
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75 ><A
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78 ><H2
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79 >Name</H2
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80 >SDL_SemPost&nbsp;--&nbsp;Unlock a semaphore.</DIV
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81 ><DIV
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82 CLASS="REFSYNOPSISDIV"
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83 ><A
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86 ><H2
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87 >Synopsis</H2
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88 ><DIV
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89 CLASS="FUNCSYNOPSIS"
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90 ><A
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93 ><P
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94 ></P
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95 ><PRE
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96 CLASS="FUNCSYNOPSISINFO"
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97 >#include "SDL.h"
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98 #include "SDL_thread.h"</PRE
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99 ><P
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100 ><CODE
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101 ><CODE
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102 CLASS="FUNCDEF"
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103 >int <B
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104 CLASS="FSFUNC"
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105 >SDL_SemPost</B
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106 ></CODE
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107 >(SDL_sem *sem);</CODE
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108 ></P
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109 ><P
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110 ></P
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111 ></DIV
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114 CLASS="REFSECT1"
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115 ><A
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117 ></A
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118 ><H2
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119 >Description</H2
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120 ><P
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121 ><TT
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122 CLASS="FUNCTION"
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123 >SDL_SemPost</TT
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124 > unlocks the semaphore pointed to by
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125 <TT
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127 ><I
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128 >sem</I
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129 ></TT
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130 > and atomically increments the semaphores value.
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131 Threads that were blocking on the semaphore may be scheduled after this call
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132 succeeds.</P
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133 ><P
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134 ><TT
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135 CLASS="FUNCTION"
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136 >SDL_SemPost</TT
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137 > should be called after a semaphore is locked by a successful call to
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138 <A
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139 HREF="sdlsemwait.html"
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140 >SDL_SemWait</A
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141 >,
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142 <A
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143 HREF="sdlsemtrywait.html"
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144 >SDL_SemTryWait</A
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145 > or
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146 <A
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147 HREF="sdlsemwaittimeout.html"
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148 >SDL_SemWaitTimeout</A
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149 >.</P
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150 ></DIV
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151 ><DIV
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152 CLASS="REFSECT1"
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153 ><A
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155 ></A
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156 ><H2
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157 >Return Value</H2
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158 ><P
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159 >Returns <SPAN
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160 CLASS="RETURNVALUE"
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161 >0</SPAN
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162 > if successful or
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163 <SPAN
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164 CLASS="RETURNVALUE"
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165 >-1</SPAN
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166 > if there was an error (leaving the semaphore unchanged).</P
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167 ></DIV
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168 ><DIV
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169 CLASS="REFSECT1"
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170 ><A
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171 NAME="AEN7646"
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172 ></A
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173 ><H2
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174 >Examples</H2
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175 ><P
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176 ><PRE
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177 CLASS="PROGRAMLISTING"
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178 >SDL_SemPost(my_sem);</PRE
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179 ></P
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180 ></DIV
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181 ><DIV
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182 CLASS="REFSECT1"
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183 ><A
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184 NAME="AEN7650"
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185 ></A
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186 ><H2
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187 >See Also</H2
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188 ><P
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189 ><A
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190 HREF="sdlcreatesemaphore.html"
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191 ><TT
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192 CLASS="FUNCTION"
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193 >SDL_CreateSemaphore</TT
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194 ></A
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195 >,
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196 <A
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197 HREF="sdldestroysemaphore.html"
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198 ><TT
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199 CLASS="FUNCTION"
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200 >SDL_DestroySemaphore</TT
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201 ></A
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202 >,
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203 <A
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204 HREF="sdlsemwait.html"
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205 ><TT
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206 CLASS="FUNCTION"
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207 >SDL_SemWait</TT
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208 ></A
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209 >,
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210 <A
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211 HREF="sdlsemtrywait.html"
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212 ><TT
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213 CLASS="FUNCTION"
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214 >SDL_SemTryWait</TT
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215 ></A
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216 >,
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217 <A
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218 HREF="sdlsemwaittimeout.html"
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219 ><TT
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220 CLASS="FUNCTION"
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221 >SDL_SemWaitTimeout</TT
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222 ></A
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223 >,
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224 <A
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225 HREF="sdlsemvalue.html"
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226 ><TT
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227 CLASS="FUNCTION"
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228 >SDL_SemValue</TT
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229 ></A
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230 ></P
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231 ></DIV
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232 ><DIV
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233 CLASS="NAVFOOTER"
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234 ><HR
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235 ALIGN="LEFT"
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236 WIDTH="100%"><TABLE
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237 WIDTH="100%"
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238 BORDER="0"
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239 CELLPADDING="0"
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240 CELLSPACING="0"
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241 ><TR
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242 ><TD
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243 WIDTH="33%"
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244 ALIGN="left"
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245 VALIGN="top"
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246 ><A
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247 HREF="sdlsemwaittimeout.html"
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248 >Prev</A
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249 ></TD
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250 ><TD
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251 WIDTH="34%"
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252 ALIGN="center"
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253 VALIGN="top"
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254 ><A
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255 HREF="index.html"
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256 >Home</A
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257 ></TD
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258 ><TD
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259 WIDTH="33%"
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260 ALIGN="right"
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261 VALIGN="top"
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262 ><A
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263 HREF="sdlsemvalue.html"
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264 >Next</A
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265 ></TD
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266 ></TR
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267 ><TR
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268 ><TD
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269 WIDTH="33%"
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270 ALIGN="left"
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271 VALIGN="top"
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272 >SDL_SemWaitTimeout</TD
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273 ><TD
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274 WIDTH="34%"
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275 ALIGN="center"
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276 VALIGN="top"
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277 ><A
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278 HREF="thread.html"
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279 >Up</A
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280 ></TD
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281 ><TD
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282 WIDTH="33%"
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283 ALIGN="right"
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284 VALIGN="top"
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285 >SDL_SemValue</TD
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286 ></TR
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287 ></TABLE
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288 ></DIV
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289 ></BODY
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290 ></HTML
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291 >