Greetings,
I was doing some pthreads/semaphore work and I tracked down a
problem in my code to a bug in sem_trywait. Posix sem_trywait is defined as
returning -1 and setting errno to EAGAIN if the semaphore would have
blocked.
The cygwin implementation returns EAGAIN an leaves errno unchanged.
Has anyone else encountered this problem and provided a fix?
Andy
[EMAIL PROTECTED]
PS. The problem seems to be in thread.cc (semaphore::TryWait) - I don't see
much
stderr setting anywhere in this file - is this verboten - or just
overlooked?
int
semaphore::TryWait ()
{
/*FIXME: signals should be able to interrupt semaphores...
*We probably need WaitForMultipleObjects here.
*/
if (WaitForSingleObject (win32_obj_id, 0) == WAIT_TIMEOUT)
return EAGAIN;
currentvalue--;
return 0;
}
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