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/* lockfile - Handle locking and unlocking of stream.

   Copyright (C) 1996, 1998 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

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

   modify it under the terms of the GNU Library General Public License as

   published by the Free Software Foundation; either version 2 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

   Library General Public License for more details.

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

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include <stdio.h>

#include <pthread.h>

void

__flockfile (FILE *stream)

{

  pthread_mutex_lock(&stream->lock);

}

weak_alias (__flockfile, flockfile);

void

__funlockfile (FILE *stream)

{

  pthread_mutex_unlock(&stream->lock);

}

weak_alias (__funlockfile, funlockfile);

int

__ftrylockfile (FILE *stream)

{

  return pthread_mutex_trylock(&stream->lock);

}

weak_alias (__ftrylockfile, ftrylockfile);

void

__fresetlockfiles (void)

{

  FILE *fp;

  pthread_mutexattr_t attr;

  pthread_mutexattr_init(&attr);

  pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);

  for (fp = _stdio_openlist; fp != NULL; fp = fp->nextopen)

    pthread_mutex_init(&fp->lock, &attr);

  pthread_mutexattr_destroy(&attr);

}