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/* lockfile - Handle locking and unlocking of stream.

   Copyright (C) 1996, 1998, 2000 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 <sys/lock.h>

#include <stdio.h>

#include <pthread.h>

#include "internals.h"

#ifdef USE_IN_LIBIO

#include "../libio/libioP.h"

#endif

#ifndef SHARED

/* We need a hook to force this file to be linked in when static

   libpthread is used.  */

const int __pthread_provide_lockfile = 0;

#endif

void

__flockfile (FILE *stream)

{

  __lock_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock);

}

#undef _IO_flockfile

strong_alias (__flockfile, _IO_flockfile)

weak_alias (__flockfile, flockfile);

void

__funlockfile (FILE *stream)

{

  __lock_release_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock);

}

#undef _IO_funlockfile

strong_alias (__funlockfile, _IO_funlockfile)

weak_alias (__funlockfile, funlockfile);

int

__ftrylockfile (FILE *stream)

{

  return __lock_try_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock);

}

strong_alias (__ftrylockfile, _IO_ftrylockfile)

weak_alias (__ftrylockfile, ftrylockfile);

void

__flockfilelist(void)

{

#ifdef USE_IN_LIBIO

  _IO_list_lock();

#endif

}

void

__funlockfilelist(void)

{

#ifdef USE_IN_LIBIO

  _IO_list_unlock();

#endif

}

void

__fresetlockfiles (void)

{

#ifdef USE_IN_LIBIO

  _IO_ITER i;

  pthread_mutexattr_t attr;

  __pthread_mutexattr_init (&attr);

  __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP);

  for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))

    __pthread_mutex_init (_IO_iter_file(i)->_lock, &attr);

  __pthread_mutexattr_destroy (&attr);

  _IO_list_resetlock();

#endif

}