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glibc  2.9
Defines | Functions
tst-sem11.c File Reference
#include <semaphore.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <internaltypes.h>
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Defines

#define SEM_WAIT(s)   sem_wait (s)

Functions

static void * tf (void *arg)
int main (void)

Define Documentation

#define SEM_WAIT (   s)    sem_wait (s)

Definition at line 8 of file tst-sem11.c.


Function Documentation

int main ( void  )

Definition at line 22 of file tst-sem11.c.

{
  int tries = 5;
  pthread_t th;
  sem_t s;
 again:
  if (sem_init (&s, 0, 0) != 0)
    {
      puts ("sem_init failed");
      return 1;
    }

  struct new_sem *is = (struct new_sem *) &s;

  if (is->nwaiters != 0)
    {
      puts ("nwaiters not initialized");
      return 1;
    }

  if (pthread_create (&th, NULL, tf, &s) != 0)
    {
      puts ("pthread_create failed");
      return 1;
    }

  sleep (1);

  if (pthread_cancel (th) != 0)
    {
      puts ("pthread_cancel failed");
      return 1;
    }

  void *r;
  if (pthread_join (th, &r) != 0)
    {
      puts ("pthread_join failed");
      return 1;
    }
  if (r != PTHREAD_CANCELED && --tries > 0)
    {
      /* Maybe we get the scheduling right the next time.  */
      sem_destroy (&s);
      goto again;
    }

  if (is->nwaiters != 0)
    {
      puts ("nwaiters not reset");
      return 1;
    }

  return 0;
}

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static void* tf ( void *  arg) [static]

Definition at line 12 of file tst-sem11.c.

{
#ifdef PREPARE
  PREPARE
#endif
  SEM_WAIT (arg);
  return NULL;
}