/* Copyright (C) 2002-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   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 <time.h>

#include <unistd.h>

#include <sys/mman.h>

#include <sys/time.h>

#include <sys/wait.h>

int *condition;

static int

do_test (void)

{

  size_t ps = sysconf (_SC_PAGESIZE);

  char tmpfname[] = "/tmp/tst-cond6.XXXXXX";

  char data[ps];

  void *mem;

  int fd;

  pthread_mutexattr_t ma;

  pthread_mutex_t *mut1;

  pthread_mutex_t *mut2;

  pthread_condattr_t ca;

  pthread_cond_t *cond;

  pid_t pid;

  int result = 0;

  fd = mkstemp (tmpfname);

  if (fd == -1)

    {

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

      exit (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");

      exit (1);

    }

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

  if (mem == MAP_FAILED)

    {

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

      exit (1);

    }

  mut1 = (pthread_mutex_t *) (((uintptr_t) mem

			       + __alignof (pthread_mutex_t))

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

  mut2 = mut1 + 1;

  cond = (pthread_cond_t *) (((uintptr_t) (mut2 + 1)

			      + __alignof (pthread_cond_t))

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

  condition = (int *) (((uintptr_t) (cond + 1) + __alignof (int))

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

  if (pthread_mutexattr_init (&ma) != 0)

    {

      puts ("mutexattr_init failed");

      exit (1);

    }

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

    {

      puts ("mutexattr_setpshared failed");

      exit (1);

    }

  if (pthread_mutex_init (mut1, &ma) != 0)

    {

      puts ("1st mutex_init failed");

      exit (1);

    }

  if (pthread_mutex_init (mut2, &ma) != 0)

    {

      puts ("2nd mutex_init failed");

      exit (1);

    }

  if (pthread_condattr_init (&ca) != 0)

    {

      puts ("condattr_init failed");

      exit (1);

    }

  if (pthread_condattr_setpshared (&ca, PTHREAD_PROCESS_SHARED) != 0)

    {

      puts ("condattr_setpshared failed");

      exit (1);

    }

  if (pthread_cond_init (cond, &ca) != 0)

    {

      puts ("cond_init failed");

      exit (1);

    }

  if (pthread_mutex_lock (mut1) != 0)

    {

      puts ("parent: 1st mutex_lock failed");

      exit (1);

    }

  puts ("going to fork now");

  pid = fork ();

  if (pid == -1)

    {

      puts ("fork failed");

      exit (1);

    }

  else if (pid == 0)

    {

      struct timespec ts;

      struct timeval tv;

      if (pthread_mutex_lock (mut2) != 0)

	{

	  puts ("child: mutex_lock failed");

	  exit (1);

	}

      if (pthread_mutex_unlock (mut1) != 0)

	{

	  puts ("child: 1st mutex_unlock failed");

	  exit (1);

	}

      if (gettimeofday (&tv, NULL) != 0)

	{

	  puts ("gettimeofday failed");

	  exit (1);

	}

      TIMEVAL_TO_TIMESPEC (&tv, &ts);

      ts.tv_nsec += 500000000;

      if (ts.tv_nsec >= 1000000000)

	{

	  ts.tv_nsec -= 1000000000;

	  ++ts.tv_sec;

	}

      do

	if (pthread_cond_timedwait (cond, mut2, &ts) != 0)

	  {

	    puts ("child: cond_wait failed");

	    exit (1);

	  }

      while (*condition == 0);

      if (pthread_mutex_unlock (mut2) != 0)

	{

	  puts ("child: 2nd mutex_unlock failed");

	  exit (1);

	}

      puts ("child done");

    }

  else

    {

      int status;

      if (pthread_mutex_lock (mut1) != 0)

	{

	  puts ("parent: 2nd mutex_lock failed");

	  exit (1);

	}

      if (pthread_mutex_lock (mut2) != 0)

	{

	  puts ("parent: 3rd mutex_lock failed");

	  exit (1);

	}

      if (pthread_cond_signal (cond) != 0)

	{

	  puts ("parent: cond_signal failed");

	  exit (1);

	}

      *condition = 1;

      if (pthread_mutex_unlock (mut2) != 0)

	{

	  puts ("parent: mutex_unlock failed");

	  exit (1);

	}

      puts ("waiting for child");

      waitpid (pid, &status, 0);

      result |= status;

      puts ("parent done");

    }

 return result;

}

#define TEST_FUNCTION do_test ()

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