diff -r 8e0182c236d8 -r 6dc250ebdd80 docs/html/sdlsemwait.html --- a/docs/html/sdlsemwait.html Wed Oct 07 06:11:53 2009 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,298 +0,0 @@ -SDL_SemWait
SDL Library Documentation
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SDL_SemWait

Name

SDL_SemWait -- Lock a semaphore and suspend the thread if the semaphore value is zero.

Synopsis

#include "SDL.h"
-#include "SDL_thread.h"

int SDL_SemWait(SDL_sem *sem);

Description

SDL_SemWait() suspends the calling thread until either -the semaphore pointed to by sem has a positive value, -the call is interrupted by a signal or error. If the call is successful it -will atomically decrement the semaphore value.

After SDL_SemWait() is successful, the semaphore -can be released and its count atomically incremented by a successful call to -SDL_SemPost.

Return Value

Returns 0 if successful or --1 if there was an error (leaving the semaphore unchanged).

Examples

if (SDL_SemWait(my_sem) == -1) {
-        return WAIT_FAILED;
-}
-
-...
-
-SDL_SemPost(my_sem);

See Also

SDL_CreateSemaphore, -SDL_DestroySemaphore, -SDL_SemTryWait, -SDL_SemWaitTimeout, -SDL_SemPost, -SDL_SemValue


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