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glibc  2.9
Defines | Functions | Variables
tst-rwlock6.c File Reference
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

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

Variables

static int kind []

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 225 of file tst-rwlock6.c.


Function Documentation

static int do_test ( void  ) [static]

Definition at line 108 of file tst-rwlock6.c.

{
  size_t cnt;
  for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
    {
      pthread_rwlock_t r;
      pthread_rwlockattr_t a;

      if (pthread_rwlockattr_init (&a) != 0)
       {
         printf ("round %Zu: rwlockattr_t failed\n", cnt);
         exit (1);
       }

      if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
       {
         printf ("round %Zu: rwlockattr_setkind failed\n", cnt);
         exit (1);
       }

      if (pthread_rwlock_init (&r, &a) != 0)
       {
         printf ("round %Zu: rwlock_init failed\n", cnt);
         exit (1);
       }

      if (pthread_rwlockattr_destroy (&a) != 0)
       {
         printf ("round %Zu: rwlockattr_destroy failed\n", cnt);
         exit (1);
       }

      struct timeval tv;
      (void) gettimeofday (&tv, NULL);

      struct timespec ts;
      TIMEVAL_TO_TIMESPEC (&tv, &ts);

      ++ts.tv_sec;

      /* Get a write lock.  */
      int e = pthread_rwlock_timedwrlock (&r, &ts);
      if (e != 0)
       {
         printf ("round %Zu: rwlock_timedwrlock failed (%d)\n", cnt, e);
         exit (1);
       }

      puts ("1st timedwrlock done");

      (void) gettimeofday (&tv, NULL);
      TIMEVAL_TO_TIMESPEC (&tv, &ts);
      ++ts.tv_sec;
      e = pthread_rwlock_timedrdlock (&r, &ts);
      if (e == 0)
       {
         puts ("timedrdlock succeeded");
         exit (1);
       }
      if (e != EDEADLK)
       {
         puts ("timedrdlock did not return EDEADLK");
         exit (1);
       }

      puts ("1st timedrdlock done");

      (void) gettimeofday (&tv, NULL);
      TIMEVAL_TO_TIMESPEC (&tv, &ts);
      ++ts.tv_sec;
      e = pthread_rwlock_timedwrlock (&r, &ts);
      if (e == 0)
       {
         puts ("2nd timedwrlock succeeded");
         exit (1);
       }
      if (e != EDEADLK)
       {
         puts ("2nd timedwrlock did not return EDEADLK");
         exit (1);
       }

      puts ("2nd timedwrlock done");

      pthread_t th;
      if (pthread_create (&th, NULL, tf, &r) != 0)
       {
         printf ("round %Zu: create failed\n", cnt);
         exit (1);
       }

      puts ("started thread");

      void *status;
      if (pthread_join (th, &status) != 0)
       {
         printf ("round %Zu: join failed\n", cnt);
         exit (1);
       }
      if (status != NULL)
       {
         printf ("failure in round %Zu\n", cnt);
         exit (1);
       }

      puts ("joined thread");

      if (pthread_rwlock_destroy (&r) != 0)
       {
         printf ("round %Zu: rwlock_destroy failed\n", cnt);
         exit (1);
       }
    }

  return 0;
}

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

Definition at line 37 of file tst-rwlock6.c.

{
  pthread_rwlock_t *r = arg;

  /* Timeout: 0.3 secs.  */
  struct timeval tv;
  (void) gettimeofday (&tv, NULL);

  struct timespec ts;
  TIMEVAL_TO_TIMESPEC (&tv, &ts);
  ts.tv_nsec += 300000000;
  if (ts.tv_nsec >= 1000000000)
    {
      ts.tv_nsec -= 1000000000;
      ++ts.tv_sec;
    }

  puts ("child calling timedrdlock");

  int err = pthread_rwlock_timedrdlock (r, &ts);
  if (err == 0)
    {
      puts ("rwlock_timedrdlock returned");
      pthread_exit ((void *) 1l);
    }

  if (err != ETIMEDOUT)
    {
      printf ("err = %s (%d), expected %s (%d)\n",
             strerror (err), err, strerror (ETIMEDOUT), ETIMEDOUT);
      pthread_exit ((void *) 1l);
    }

  puts ("1st child timedrdlock done");

  struct timeval tv2;
  (void) gettimeofday (&tv2, NULL);

  timersub (&tv2, &tv, &tv);

  if (tv.tv_usec < 200000)
    {
      puts ("timeout too short");
      pthread_exit ((void *) 1l);
    }

  (void) gettimeofday (&tv, NULL);
  TIMEVAL_TO_TIMESPEC (&tv, &ts);
  ts.tv_sec += 10;
  /* Note that the following operation makes ts invalid.  */
  ts.tv_nsec += 1000000000;

  err = pthread_rwlock_timedrdlock (r, &ts);
  if (err == 0)
    {
      puts ("2nd timedrdlock succeeded");
      pthread_exit ((void *) 1l);
    }
  if (err != EINVAL)
    {
      puts ("2nd timedrdlock did not return EINVAL");
      pthread_exit ((void *) 1l);
    }

  puts ("2nd child timedrdlock done");

  return NULL;
}

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Variable Documentation

int kind[] [static]
Initial value:
  {
    PTHREAD_RWLOCK_PREFER_READER_NP,
    PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
    PTHREAD_RWLOCK_PREFER_WRITER_NP,
  }

Definition at line 28 of file tst-rwlock6.c.