On Thu, 2012-11-22 at 23:07 +0200, Stefan Stefanov wrote:
> Can anyone explain me what is wrong with libpthread-stub.so?
>
> As I understand, sem_wait() works as intended according to the source code:
> static int __sem_wait_stub(sem_t *_sem)
> {
> unsigned int *sem = (unsigned int *) _sem;
> if (!*sem) {
> /* Not available, simulate a blocking sem_wait */
> pause();
> errno = EINTR;
> return -1;
> }
> *sem--;
> return 0;
> }
>
> If the semaphore is available, sem_wait decrements the semaphore value
> and returns to the caller.
> If the semaphore is unavailable, sem_wait suspends execution of the
> calling thread by call of pause().
>
> Obviously in our case semaphor is unavailable (null), thus it blocks.
I don't know about the specific problem here, but the fact that you're
using a pthread stub library instead of an actual implementation
suggests that you're going to have a number of problems trying to get
things to work.
-- Arun
