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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [fwalk.c] - Blame information for rev 207

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1 207 jeremybenn
/*
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 * Copyright (c) 1990 The Regents of the University of California.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms are permitted
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 * provided that the above copyright notice and this paragraph are
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 * duplicated in all such forms and that any documentation,
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 * advertising materials, and other materials related to such
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 * distribution and use acknowledge that the software was developed
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 * by the University of California, Berkeley.  The name of the
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 * University may not be used to endorse or promote products derived
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 * from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 */
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/* No user fns here.  Pesch 15apr92. */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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#include <_ansi.h>
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#include <reent.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "local.h"
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static int
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_DEFUN(__fwalk, (ptr, function),
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       struct _reent *ptr _AND
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       register int (*function) (FILE *))
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{
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  register FILE *fp;
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  register int n, ret = 0;
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  register struct _glue *g;
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  for (g = &ptr->__sglue; g != NULL; g = g->_next)
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    for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
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      if (fp->_flags != 0)
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        {
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          if (fp->_flags != 0 && fp->_file != -1)
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            ret |= (*function) (fp);
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        }
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  return ret;
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}
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/* Special version of __fwalk where the function pointer is a reentrant
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   I/O function (e.g. _fclose_r).  */
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static int
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_DEFUN(__fwalk_reent, (ptr, reent_function),
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       struct _reent *ptr _AND
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       register int (*reent_function) (struct _reent *, FILE *))
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{
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  register FILE *fp;
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  register int n, ret = 0;
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  register struct _glue *g;
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  for (g = &ptr->__sglue; g != NULL; g = g->_next)
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    for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
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      if (fp->_flags != 0)
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        {
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          if (fp->_flags != 0 && fp->_file != -1)
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            ret |= (*reent_function) (ptr, fp);
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        }
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  return ret;
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}
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int
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_DEFUN(_fwalk, (ptr, function),
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       struct _reent *ptr _AND
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       register int (*function)(FILE *))
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{
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  register int ret = 0;
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  __sfp_lock_acquire ();
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  /* Must traverse given list for streams.  Note that _GLOBAL_REENT
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     only walked once in exit().  */
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  ret |= __fwalk (ptr, function);
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  __sfp_lock_release ();
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  return ret;
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}
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/* Special version of _fwalk which handles a function pointer to a
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   reentrant I/O function (e.g. _fclose_r).  */
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int
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_DEFUN(_fwalk_reent, (ptr, reent_function),
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       struct _reent *ptr _AND
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       register int (*reent_function) (struct _reent *, FILE *))
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{
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  register int ret = 0;
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  __sfp_lock_acquire ();
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  /* Must traverse given list for streams.  Note that _GLOBAL_REENT
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     only walked once in exit().  */
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  ret |= __fwalk_reent (ptr, reent_function);
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  __sfp_lock_release ();
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  return ret;
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}

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