118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/* No user fns here. Pesch 15apr92. */
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/*
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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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#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 <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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__fwalk (ptr, function)
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struct _reent *ptr;
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register int (*function) ();
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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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_flockfile (fp);
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if (fp->_flags != 0 && fp->_file != -1)
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ret |= (*function) (fp);
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_funlockfile (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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__fwalk_reent (ptr, reent_function)
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struct _reent *ptr;
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register int (*reent_function) ();
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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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_flockfile (fp);
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if (fp->_flags != 0 && fp->_file != -1)
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ret |= (*reent_function) (ptr, fp);
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_funlockfile (fp);
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}
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return ret;
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}
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int
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_fwalk (ptr, function)
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struct _reent *ptr;
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register int (*function) ();
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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 std streams. */
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if (ptr != _GLOBAL_REENT)
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ret |= __fwalk (ptr, function);
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/* Must traverse global list for all other streams. */
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ret |= __fwalk (_GLOBAL_REENT, 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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_fwalk_reent (ptr, reent_function)
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struct _reent *ptr;
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register int (*reent_function) ();
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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 std streams. */
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if (ptr != _GLOBAL_REENT)
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ret |= __fwalk_reent (ptr, reent_function);
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/* Must traverse global list for all other streams. */
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ret |= __fwalk_reent (_GLOBAL_REENT, reent_function);
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__sfp_lock_release ();
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return ret;
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}
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