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278 lines
3.5 KiB
278 lines
3.5 KiB
<HTML |
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>SDL_DestroySemaphore</TITLE |
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TITLE="SDL_CreateSemaphore" |
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>SDL Library Documentation</TH |
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>Prev</A |
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><H1 |
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><A |
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NAME="SDLDESTROYSEMAPHORE" |
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></A |
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>SDL_DestroySemaphore</H1 |
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><DIV |
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CLASS="REFNAMEDIV" |
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><A |
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NAME="AEN7982" |
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></A |
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><H2 |
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>Name</H2 |
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>SDL_DestroySemaphore -- Destroys a semaphore that was created by <A |
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HREF="sdlcreatesemaphore.html" |
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>SDL_CreateSemaphore</A |
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>.</DIV |
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><DIV |
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CLASS="REFSYNOPSISDIV" |
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><A |
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NAME="AEN7986" |
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></A |
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><H2 |
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>Synopsis</H2 |
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><DIV |
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CLASS="FUNCSYNOPSIS" |
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><A |
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NAME="AEN7987" |
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></A |
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><P |
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></P |
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><PRE |
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CLASS="FUNCSYNOPSISINFO" |
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>#include "SDL.h" |
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#include "SDL_thread.h"</PRE |
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><P |
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><CODE |
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><CODE |
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CLASS="FUNCDEF" |
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>void <B |
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CLASS="FSFUNC" |
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>SDL_DestroySemaphore</B |
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></CODE |
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>(SDL_sem *sem);</CODE |
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></P |
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><P |
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></P |
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></DIV |
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></DIV |
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><DIV |
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CLASS="REFSECT1" |
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><A |
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NAME="AEN7993" |
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></A |
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><H2 |
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>Description</H2 |
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><P |
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><TT |
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CLASS="FUNCTION" |
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>SDL_DestroySemaphore</TT |
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> destroys the semaphore pointed to |
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by <TT |
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CLASS="PARAMETER" |
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><I |
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>sem</I |
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></TT |
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> that was created by |
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<A |
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HREF="sdlcreatesemaphore.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_CreateSemaphore</TT |
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></A |
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>. |
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It is not safe to destroy a semaphore if there are threads currently blocked |
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waiting on it.</P |
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></DIV |
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><DIV |
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CLASS="REFSECT1" |
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><A |
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NAME="AEN8000" |
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></A |
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><H2 |
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>Examples</H2 |
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><P |
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><PRE |
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CLASS="PROGRAMLISTING" |
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>if (my_sem != NULL) { |
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SDL_DestroySemaphore(my_sem); |
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my_sem = NULL; |
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}</PRE |
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></P |
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></DIV |
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><DIV |
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CLASS="REFSECT1" |
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><A |
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NAME="AEN8004" |
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></A |
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><H2 |
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>See Also</H2 |
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><P |
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><A |
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HREF="sdlcreatesemaphore.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_CreateSemaphore</TT |
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></A |
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>, |
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<A |
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HREF="sdlsemwait.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_SemWait</TT |
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></A |
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>, |
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<A |
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HREF="sdlsemtrywait.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_SemTryWait</TT |
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></A |
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>, |
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<A |
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HREF="sdlsemwaittimeout.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_SemWaitTimeout</TT |
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></A |
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>, |
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<A |
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HREF="sdlsempost.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_SemPost</TT |
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></A |
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>, |
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<A |
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HREF="sdlsemvalue.html" |
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><TT |
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CLASS="FUNCTION" |
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>SDL_SemValue</TT |
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></A |
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></P |
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>SDL_CreateSemaphore</TD |
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