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4 >SDL_DestroySemaphore</TITLE |
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43 ><TD |
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48 HREF="sdlcreatesemaphore.html" |
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62 HREF="sdlsemwait.html" |
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69 ALIGN="LEFT" |
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70 WIDTH="100%"></DIV |
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71 ><H1 |
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72 ><A |
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73 NAME="SDLDESTROYSEMAPHORE" |
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74 ></A |
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75 >SDL_DestroySemaphore</H1 |
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76 ><DIV |
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77 CLASS="REFNAMEDIV" |
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78 ><A |
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79 NAME="AEN7982" |
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80 ></A |
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81 ><H2 |
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82 >Name</H2 |
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83 >SDL_DestroySemaphore -- Destroys a semaphore that was created by <A |
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84 HREF="sdlcreatesemaphore.html" |
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85 >SDL_CreateSemaphore</A |
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86 >.</DIV |
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87 ><DIV |
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88 CLASS="REFSYNOPSISDIV" |
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89 ><A |
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90 NAME="AEN7986" |
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91 ></A |
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92 ><H2 |
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93 >Synopsis</H2 |
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94 ><DIV |
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95 CLASS="FUNCSYNOPSIS" |
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97 NAME="AEN7987" |
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98 ></A |
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99 ><P |
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100 ></P |
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101 ><PRE |
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102 CLASS="FUNCSYNOPSISINFO" |
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103 >#include "SDL.h" |
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104 #include "SDL_thread.h"</PRE |
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105 ><P |
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106 ><CODE |
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107 ><CODE |
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108 CLASS="FUNCDEF" |
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109 >void <B |
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110 CLASS="FSFUNC" |
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111 >SDL_DestroySemaphore</B |
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112 ></CODE |
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113 >(SDL_sem *sem);</CODE |
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114 ></P |
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115 ><P |
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116 ></P |
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117 ></DIV |
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118 ></DIV |
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119 ><DIV |
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120 CLASS="REFSECT1" |
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121 ><A |
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122 NAME="AEN7993" |
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123 ></A |
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124 ><H2 |
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125 >Description</H2 |
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126 ><P |
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127 ><TT |
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128 CLASS="FUNCTION" |
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129 >SDL_DestroySemaphore</TT |
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130 > destroys the semaphore pointed to |
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131 by <TT |
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132 CLASS="PARAMETER" |
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133 ><I |
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134 >sem</I |
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135 ></TT |
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136 > that was created by |
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137 <A |
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138 HREF="sdlcreatesemaphore.html" |
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139 ><TT |
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140 CLASS="FUNCTION" |
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141 >SDL_CreateSemaphore</TT |
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142 ></A |
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143 >. |
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144 It is not safe to destroy a semaphore if there are threads currently blocked |
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145 waiting on it.</P |
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146 ></DIV |
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147 ><DIV |
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148 CLASS="REFSECT1" |
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149 ><A |
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150 NAME="AEN8000" |
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151 ></A |
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152 ><H2 |
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153 >Examples</H2 |
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154 ><P |
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155 ><PRE |
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156 CLASS="PROGRAMLISTING" |
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157 >if (my_sem != NULL) { |
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158 SDL_DestroySemaphore(my_sem); |
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159 my_sem = NULL; |
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160 }</PRE |
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161 ></P |
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162 ></DIV |
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163 ><DIV |
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164 CLASS="REFSECT1" |
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165 ><A |
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166 NAME="AEN8004" |
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167 ></A |
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168 ><H2 |
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169 >See Also</H2 |
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170 ><P |
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171 ><A |
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172 HREF="sdlcreatesemaphore.html" |
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173 ><TT |
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174 CLASS="FUNCTION" |
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175 >SDL_CreateSemaphore</TT |
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176 ></A |
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177 >, |
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178 <A |
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179 HREF="sdlsemwait.html" |
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180 ><TT |
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181 CLASS="FUNCTION" |
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182 >SDL_SemWait</TT |
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183 ></A |
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184 >, |
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185 <A |
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186 HREF="sdlsemtrywait.html" |
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187 ><TT |
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188 CLASS="FUNCTION" |
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189 >SDL_SemTryWait</TT |
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190 ></A |
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191 >, |
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192 <A |
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193 HREF="sdlsemwaittimeout.html" |
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194 ><TT |
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195 CLASS="FUNCTION" |
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196 >SDL_SemWaitTimeout</TT |
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197 ></A |
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198 >, |
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199 <A |
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200 HREF="sdlsempost.html" |
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201 ><TT |
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202 CLASS="FUNCTION" |
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203 >SDL_SemPost</TT |
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204 ></A |
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205 >, |
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206 <A |
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207 HREF="sdlsemvalue.html" |
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208 ><TT |
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209 CLASS="FUNCTION" |
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210 >SDL_SemValue</TT |
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211 ></A |
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