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newlib-cygwin/newlib/libc/stdio/fwalk.c

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import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
/*
* 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,
Use remove-advertising-clause script to edit BSD licenses This edits licenses held by Berkeley and NetBSD, both of which have removed the advertising requirement from their licenses. Signed-off-by: Keith Packard <keithp@keithp.com>
2020-01-29 02:54:53 +08:00
* and/or other materials related to such
import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
* 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.
*/
2004-04-23 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/asprintf.c libc/stdio/clearerr.c, libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c, libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c, libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c, libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c, libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c, libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c, libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c, libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c, libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c, libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c, libc/stdio/getchar.c libc/stdio/getchar_u.c, libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c, libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h, libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c, libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c, libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c, libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c, libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c, libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c, libc/stdio/setlinebuf.c libc/stdio/setvbuf.c, libc/stdio/siprintf.c libc/stdio/snprintf.c, libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c, libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c, libc/stdio/vasprintf.c libc/stdio/vfieeefp.h, libc/stdio/vfprintf.c libc/stdio/vfscanf.c, libc/stdio/vprintf.c libc/stdio/vscanf.c, libc/stdio/vsnprintf.c libc/stdio/vsprintf.c, libc/stdio/vsscanf.c libc/stdio/wbuf.c, libc/stdio/wsetup.c: Perform minor formatting changes. Move copyright notices to top of file, ensure that <_ansi.h> is included, be consistent with open parentheses, use _DEFUN macro, include "local.h" where needed, and remove various compiler warnings.
2004-04-24 04:01:55 +08:00
/* No user fns here. Pesch 15apr92. */
import newlib-2000-02-17 snapshot
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#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
2004-04-23 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/asprintf.c libc/stdio/clearerr.c, libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c, libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c, libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c, libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c, libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c, libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c, libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c, libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c, libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c, libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c, libc/stdio/getchar.c libc/stdio/getchar_u.c, libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c, libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h, libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c, libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c, libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c, libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c, libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c, libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c, libc/stdio/setlinebuf.c libc/stdio/setvbuf.c, libc/stdio/siprintf.c libc/stdio/snprintf.c, libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c, libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c, libc/stdio/vasprintf.c libc/stdio/vfieeefp.h, libc/stdio/vfprintf.c libc/stdio/vfscanf.c, libc/stdio/vprintf.c libc/stdio/vscanf.c, libc/stdio/vsnprintf.c libc/stdio/vsprintf.c, libc/stdio/vsscanf.c libc/stdio/wbuf.c, libc/stdio/wsetup.c: Perform minor formatting changes. Move copyright notices to top of file, ensure that <_ansi.h> is included, be consistent with open parentheses, use _DEFUN macro, include "local.h" where needed, and remove various compiler warnings.
2004-04-24 04:01:55 +08:00
#include <_ansi.h>
#include <reent.h>
import newlib-2000-02-17 snapshot
2000-02-18 03:39:52 +08:00
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
* libc/stdio/fclose.c: Only use sfp lock to guard non-atomic changes of flags and fp lock. * libc/stdio/freopen.c: Ditto. * libc/stdio/freopen64.c: Ditto. * libc/stdio/fgetc.c: Revert change from 2009-04-24, remove sfp locks which guard entire function to avoid potential deadlocks when using stdio functions in multiple thraeds. * libc/stdio/fgets.c: Ditto. * libc/stdio/fgetwc.c: Ditto. * libc/stdio/fgetws.c: Ditto. * libc/stdio/fread.c: Ditto. * libc/stdio/fseek.c: Ditto. * libc/stdio/getc.c: Ditto. * libc/stdio/getdelim.c: Ditto. * libc/stdio/gets.c: Ditto. * libc/stdio/vfscanf.c: Ditto. * libc/stdio/vfwscanf.c: Ditto. * libc/stdio/fflush.c (_fflush_r): Split out core functionality into new function __sflush_r. Just lock file and call __sflush_r from here. * libc/stdio/fwalk.c (_fwalk): Remove static helper function and move functionality back into main function. Don't walk a file with flags value of 1. Add comment. (_fwalk_reent): Ditto. * libc/stdio/local.h (__sflush_r): Declare. * libc/stdio/refill.c (__srefill): Before calling fwalk, set flags value to 1 so this file pointer isn't walked. Revert flags afterwards and call __sflush_r for this fp if necessary. Add comments.
2011-01-28 18:49:11 +08:00
int
stdio: Replace _fwalk_reent() with _fwalk_sglue() Replaced _fwalk_reent() with _fwalk_sglue(). The change adds an extra __sglue object as a parameter, which will allow the passing of a global __sglue object separate from the __sglue member of struct _reent. The global __sglue object will be added in a follow-on patch.
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_fwalk_sglue (struct _reent *ptr, int (*func) (struct _reent *, FILE *),
struct _glue *g)
2004-04-08 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/fclose.c (_fclose_r): New function. * libc/stdio/freopen.c (_freopen_r): Call _fclose_r. * libc/stdio/fcloseall.c (_fcloseall_r): Call _fwalk_reent. * libc/stdio64/freopen64.c (_freopen64_r): Use _fclose_r. * libc/include/stdio.h (_fclose_r): New prototype. * libc/stdio/fopen.c: Fix typo in comment. 2004-04-08 Jeff Johnston <jjohnstn@redhat.com> * libc/stdio/fwalk.c (_fwalk_reent): New version of _fwalk to handle _r reentrant functions.
2004-04-09 06:26:50 +08:00
{
stdio: Replace _fwalk_reent() with _fwalk_sglue() Replaced _fwalk_reent() with _fwalk_sglue(). The change adds an extra __sglue object as a parameter, which will allow the passing of a global __sglue object separate from the __sglue member of struct _reent. The global __sglue object will be added in a follow-on patch.
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FILE *fp;
int n, ret = 0;
2004-04-08 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/fclose.c (_fclose_r): New function. * libc/stdio/freopen.c (_freopen_r): Call _fclose_r. * libc/stdio/fcloseall.c (_fcloseall_r): Call _fwalk_reent. * libc/stdio64/freopen64.c (_freopen64_r): Use _fclose_r. * libc/include/stdio.h (_fclose_r): New prototype. * libc/stdio/fopen.c: Fix typo in comment. 2004-04-08 Jeff Johnston <jjohnstn@redhat.com> * libc/stdio/fwalk.c (_fwalk_reent): New version of _fwalk to handle _r reentrant functions.
2004-04-09 06:26:50 +08:00
* libc/stdio/fclose.c: Only use sfp lock to guard non-atomic changes of flags and fp lock. * libc/stdio/freopen.c: Ditto. * libc/stdio/freopen64.c: Ditto. * libc/stdio/fgetc.c: Revert change from 2009-04-24, remove sfp locks which guard entire function to avoid potential deadlocks when using stdio functions in multiple thraeds. * libc/stdio/fgets.c: Ditto. * libc/stdio/fgetwc.c: Ditto. * libc/stdio/fgetws.c: Ditto. * libc/stdio/fread.c: Ditto. * libc/stdio/fseek.c: Ditto. * libc/stdio/getc.c: Ditto. * libc/stdio/getdelim.c: Ditto. * libc/stdio/gets.c: Ditto. * libc/stdio/vfscanf.c: Ditto. * libc/stdio/vfwscanf.c: Ditto. * libc/stdio/fflush.c (_fflush_r): Split out core functionality into new function __sflush_r. Just lock file and call __sflush_r from here. * libc/stdio/fwalk.c (_fwalk): Remove static helper function and move functionality back into main function. Don't walk a file with flags value of 1. Add comment. (_fwalk_reent): Ditto. * libc/stdio/local.h (__sflush_r): Declare. * libc/stdio/refill.c (__srefill): Before calling fwalk, set flags value to 1 so this file pointer isn't walked. Revert flags afterwards and call __sflush_r for this fp if necessary. Add comments.
2011-01-28 18:49:11 +08:00
/*
* It should be safe to walk the list without locking it;
* new nodes are only added to the end and none are ever
* removed.
*
* Avoid locking this list while walking it or else you will
* introduce a potential deadlock in [at least] refill.c.
*/
stdio: Replace _fwalk_reent() with _fwalk_sglue() Replaced _fwalk_reent() with _fwalk_sglue(). The change adds an extra __sglue object as a parameter, which will allow the passing of a global __sglue object separate from the __sglue member of struct _reent. The global __sglue object will be added in a follow-on patch.
2022-04-01 19:32:32 +08:00
do {
2004-04-08 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/fclose.c (_fclose_r): New function. * libc/stdio/freopen.c (_freopen_r): Call _fclose_r. * libc/stdio/fcloseall.c (_fcloseall_r): Call _fwalk_reent. * libc/stdio64/freopen64.c (_freopen64_r): Use _fclose_r. * libc/include/stdio.h (_fclose_r): New prototype. * libc/stdio/fopen.c: Fix typo in comment. 2004-04-08 Jeff Johnston <jjohnstn@redhat.com> * libc/stdio/fwalk.c (_fwalk_reent): New version of _fwalk to handle _r reentrant functions.
2004-04-09 06:26:50 +08:00
for (fp = g->_iobs, n = g->_niobs; --n >= 0; fp++)
* libc/stdio/fwalk.c (_fwalk_reent): Remove redundant test.
2014-09-05 17:31:32 +08:00
if (fp->_flags != 0 && fp->_flags != 1 && fp->_file != -1)
stdio: Replace _fwalk_reent() with _fwalk_sglue() Replaced _fwalk_reent() with _fwalk_sglue(). The change adds an extra __sglue object as a parameter, which will allow the passing of a global __sglue object separate from the __sglue member of struct _reent. The global __sglue object will be added in a follow-on patch.
2022-04-01 19:32:32 +08:00
ret |= (*func) (ptr, fp);
g = g->_next;
} while (g != NULL);
2004-04-08 Artem B. Bityuckiy <abitytsky@softminecorp.com> * libc/stdio/fclose.c (_fclose_r): New function. * libc/stdio/freopen.c (_freopen_r): Call _fclose_r. * libc/stdio/fcloseall.c (_fcloseall_r): Call _fwalk_reent. * libc/stdio64/freopen64.c (_freopen64_r): Use _fclose_r. * libc/include/stdio.h (_fclose_r): New prototype. * libc/stdio/fopen.c: Fix typo in comment. 2004-04-08 Jeff Johnston <jjohnstn@redhat.com> * libc/stdio/fwalk.c (_fwalk_reent): New version of _fwalk to handle _r reentrant functions.
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return ret;
}