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| >SDL_SemPost</H1 |
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| ><H2 |
| >Name</H2 |
| >SDL_SemPost -- Unlock a semaphore.</DIV |
| ><DIV |
| CLASS="REFSYNOPSISDIV" |
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| NAME="AEN8173" |
| ></A |
| ><H2 |
| >Synopsis</H2 |
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| ><P |
| ></P |
| ><PRE |
| CLASS="FUNCSYNOPSISINFO" |
| >#include "SDL.h" |
| #include "SDL_thread.h"</PRE |
| ><P |
| ><CODE |
| ><CODE |
| CLASS="FUNCDEF" |
| >int <B |
| CLASS="FSFUNC" |
| >SDL_SemPost</B |
| ></CODE |
| >(SDL_sem *sem);</CODE |
| ></P |
| ><P |
| ></P |
| ></DIV |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN8180" |
| ></A |
| ><H2 |
| >Description</H2 |
| ><P |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemPost</TT |
| > unlocks the semaphore pointed to by |
| <TT |
| CLASS="PARAMETER" |
| ><I |
| >sem</I |
| ></TT |
| > and atomically increments the semaphores value. |
| Threads that were blocking on the semaphore may be scheduled after this call |
| succeeds.</P |
| ><P |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemPost</TT |
| > should be called after a semaphore is locked by a successful call to |
| <A |
| HREF="sdlsemwait.html" |
| >SDL_SemWait</A |
| >, |
| <A |
| HREF="sdlsemtrywait.html" |
| >SDL_SemTryWait</A |
| > or |
| <A |
| HREF="sdlsemwaittimeout.html" |
| >SDL_SemWaitTimeout</A |
| >.</P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN8190" |
| ></A |
| ><H2 |
| >Return Value</H2 |
| ><P |
| >Returns <SPAN |
| CLASS="RETURNVALUE" |
| >0</SPAN |
| > if successful or |
| <SPAN |
| CLASS="RETURNVALUE" |
| >-1</SPAN |
| > if there was an error (leaving the semaphore unchanged).</P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN8195" |
| ></A |
| ><H2 |
| >Examples</H2 |
| ><P |
| ><PRE |
| CLASS="PROGRAMLISTING" |
| >SDL_SemPost(my_sem);</PRE |
| ></P |
| ></DIV |
| ><DIV |
| CLASS="REFSECT1" |
| ><A |
| NAME="AEN8199" |
| ></A |
| ><H2 |
| >See Also</H2 |
| ><P |
| ><A |
| HREF="sdlcreatesemaphore.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_CreateSemaphore</TT |
| ></A |
| >, |
| <A |
| HREF="sdldestroysemaphore.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_DestroySemaphore</TT |
| ></A |
| >, |
| <A |
| HREF="sdlsemwait.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemWait</TT |
| ></A |
| >, |
| <A |
| HREF="sdlsemtrywait.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemTryWait</TT |
| ></A |
| >, |
| <A |
| HREF="sdlsemwaittimeout.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemWaitTimeout</TT |
| ></A |
| >, |
| <A |
| HREF="sdlsemvalue.html" |
| ><TT |
| CLASS="FUNCTION" |
| >SDL_SemValue</TT |
| ></A |
| ></P |
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