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/*

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by the University of California, Berkeley.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

/* No user fns here.  Pesch 15apr92. */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "%W% (Berkeley) %G%";

#endif /* LIBC_SCCS and not lint */

#include <_ansi.h>

#include <reent.h>

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include "local.h"

static int

_DEFUN(__fwalk, (ptr, function),

       struct _reent *ptr _AND

       register int (*function) (FILE *))

{

  register FILE *fp;

  register int n, ret = 0;

  register struct _glue *g;

  for (g = &ptr->__sglue; g != NULL; g = g->_next)

    for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)

      if (fp->_flags != 0)

        {

          _flockfile (fp);

          if (fp->_flags != 0 && fp->_file != -1)

            ret |= (*function) (fp);

          _funlockfile (fp);

        }

  return ret;

}

/* Special version of __fwalk where the function pointer is a reentrant

   I/O function (e.g. _fclose_r).  */

static int

_DEFUN(__fwalk_reent, (ptr, reent_function),

       struct _reent *ptr _AND

       register int (*reent_function) (struct _reent *, FILE *))

{

  register FILE *fp;

  register int n, ret = 0;

  register struct _glue *g;

  for (g = &ptr->__sglue; g != NULL; g = g->_next)

    for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)

      if (fp->_flags != 0)

        {

          _flockfile (fp);

          if (fp->_flags != 0 && fp->_file != -1)

            ret |= (*reent_function) (ptr, fp);

          _funlockfile (fp);

        }

  return ret;

}

int

_DEFUN(_fwalk, (ptr, function),

       struct _reent *ptr _AND

       register int (*function)(FILE *))

{

  register int ret = 0;

  __sfp_lock_acquire ();

  /* Must traverse given list for streams.  Note that _GLOBAL_REENT

     only walked once in exit().  */

  ret |= __fwalk (ptr, function);

  __sfp_lock_release ();

  return ret;

}

/* Special version of _fwalk which handles a function pointer to a

   reentrant I/O function (e.g. _fclose_r).  */

int

_DEFUN(_fwalk_reent, (ptr, reent_function),

       struct _reent *ptr _AND

       register int (*reent_function) (struct _reent *, FILE *))

{

  register int ret = 0;

  __sfp_lock_acquire ();

  /* Must traverse given list for streams.  Note that _GLOBAL_REENT

     only walked once in exit().  */

  ret |= __fwalk_reent (ptr, reent_function);

  __sfp_lock_release ();

  return ret;

}