/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <pthread.h>

#include <stdint.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/mman.h>

#include <sys/time.h>

#include <sys/wait.h>

static int

do_test (void)

{

  size_t ps = sysconf (_SC_PAGESIZE);

  char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";

  char data[ps];

  void *mem;

  int fd;

  pthread_mutex_t *m;

  pthread_mutexattr_t a;

  pid_t pid;

  fd = mkstemp (tmpfname);

  if (fd == -1)

    {

      printf ("cannot open temporary file: %m\n");

      return 1;

    }

  /* Make sure it is always removed.  */

  unlink (tmpfname);

  /* Create one page of data.  */

  memset (data, '\0', ps);

  /* Write the data to the file.  */

  if (write (fd, data, ps) != (ssize_t) ps)

    {

      puts ("short write");

      return 1;

    }

  mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);

  if (mem == MAP_FAILED)

    {

      printf ("mmap failed: %m\n");

      return 1;

    }

  m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))

			   & ~(__alignof (pthread_mutex_t) - 1));

  if (pthread_mutexattr_init (&a) != 0)

    {

      puts ("mutexattr_init failed");

      return 1;

    }

  if (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)

    {

      puts ("mutexattr_setpshared failed");

      return 1;

    }

  if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE) != 0)

    {

      puts ("mutexattr_settype failed");

      return 1;

    }

#ifdef ENABLE_PI

  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)

    {

      puts ("pthread_mutexattr_setprotocol failed");

      return 1;

    }

#endif

  int e;

  if ((e = pthread_mutex_init (m, &a)) != 0)

    {

#ifdef ENABLE_PI

      if (e == ENOTSUP)

	{

	  puts ("PI mutexes unsupported");

	  return 0;

	}

#endif

      puts ("mutex_init failed");

      return 1;

    }

  if (pthread_mutex_lock (m) != 0)

    {

      puts ("mutex_lock failed");

      return 1;

    }

  if (pthread_mutexattr_destroy (&a) != 0)

    {

      puts ("mutexattr_destroy failed");

      return 1;

    }

  puts ("going to fork now");

  pid = fork ();

  if (pid == -1)

    {

      puts ("fork failed");

      return 1;

    }

  else if (pid == 0)

    {

      if (pthread_mutex_trylock (m) == 0)

	{

	  puts ("child: mutex_trylock succeeded");

	  exit (1);

	}

      if (pthread_mutex_unlock (m) == 0)

	{

	  puts ("child: mutex_unlock succeeded");

	  exit (1);

	}

      struct timeval tv;

      gettimeofday (&tv, NULL);

      struct timespec ts;

      TIMEVAL_TO_TIMESPEC (&tv, &ts);

      ts.tv_nsec += 500000000;

      if (ts.tv_nsec >= 1000000000)

	{

	  ++ts.tv_sec;

	  ts.tv_nsec -= 1000000000;

	}

      e = pthread_mutex_timedlock (m, &ts);

      if (e == 0)

	{

	  puts ("child: mutex_timedlock succeeded");

	  exit (1);

	}

      if (e != ETIMEDOUT)

	{

	  puts ("child: mutex_timedlock didn't time out");

	  exit (1);

	}

      alarm (1);

      pthread_mutex_lock (m);

      puts ("child: mutex_lock returned");

      exit (0);

    }

  sleep (2);

  int status;

  if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)

    {

      puts ("waitpid failed");

      return 1;

    }

  if (! WIFSIGNALED (status))

    {

      puts ("child not killed by signal");

      return 1;

    }

  if (WTERMSIG (status) != SIGALRM)

    {

      puts ("child not killed by SIGALRM");

      return 1;

    }

  return 0;

}

#define TIMEOUT 3

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"