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git://sourceware.org/git/newlib-cygwin.git
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10dcf7e718
* libc/stdio/fclose.c (fclose): Protect file pointer list when
releasing a file.
* libc/stdio/fcloseall.c (_fcloseall_r): Close all files via
fwalk.
* libc/stdio/fdopen.c (_fdopen_r): Add calls to
_flockfile/_funlockfile.
* libc/stdio/findfp.c: Move __sfp_lock. Change __sfp_lock type
to recursive.
Change __lock_acquire/__lock_release calls for __sfp_lock to
__sfp_lock_acquire/__sfp_lock_release throughout.
(std): Make sure that file lock is only initialized once.
(__sfp): Move _file initialization. Initialize file lock.
(__sfp_lock_acquire): New function.
(__sfp_lock_release): Ditto.
(__fp_lock_all): Remove __sfp_lock_acquire call.
(__fp_unlock_all): Remove __sfp_lock_release call.
* libc/stdio/fopen.c (_fopen_r): Protect file pointer list.
Add calls to _flockfile/_funlockfile. Remove
__lock_init_recursive call.
* libc/stdio/freopen.c (_freopen_r): Protect file pointer list.
* libc/stdio/fwalk.c (__fwalk): New static function.
(_fwalk): Protect file pointer list. Use __fwalk to walk through
file pointers.
* libc/stdio/local.h: Add defines for
__sfp_lock_acquire/__sfp_lock_release when
single threaded. Add function prototypes otherwise.
* libc/stdio64/fdopen64.c (_fdopen64_r): Add calls to
_flockfile/_funlockfile.
* libc/stdio/fopen64.c (_fopen64_r): Protect file pointer list.
Add calls to _flockfile/_funlockfile. Remove
__lock_init_recursive call.
* libc/stdio/freopen64.c (_freopen64_r): Protect file pointer
list.
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
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FUNCTION
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<<fclose>>---close a file
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INDEX
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fclose
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ANSI_SYNOPSIS
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#include <stdio.h>
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int fclose(FILE *<[fp]>);
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TRAD_SYNOPSIS
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#include <stdio.h>
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int fclose(<[fp]>)
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FILE *<[fp]>;
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DESCRIPTION
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If the file or stream identified by <[fp]> is open, <<fclose>> closes
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it, after first ensuring that any pending data is written (by calling
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<<fflush(<[fp]>)>>).
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RETURNS
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<<fclose>> returns <<0>> if successful (including when <[fp]> is
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<<NULL>> or not an open file); otherwise, it returns <<EOF>>.
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PORTABILITY
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<<fclose>> is required by ANSI C.
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Required OS subroutines: <<close>>, <<fstat>>, <<isatty>>, <<lseek>>,
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<<read>>, <<sbrk>>, <<write>>.
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*/
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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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#include <stdio.h>
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#include <stdlib.h>
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#include "local.h"
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#include <sys/lock.h>
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/*
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* Close a file.
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*/
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int
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_DEFUN (fclose, (fp),
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register FILE * fp)
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{
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int r;
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if (fp == NULL)
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return (0); /* on NULL */
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__sfp_lock_acquire ();
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_flockfile(fp);
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CHECK_INIT (fp);
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if (fp->_flags == 0) /* not open! */
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{
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_funlockfile(fp);
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__sfp_lock_release ();
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return (0);
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}
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r = fp->_flags & __SWR ? fflush (fp) : 0;
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if (fp->_close != NULL && (*fp->_close) (fp->_cookie) < 0)
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r = EOF;
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if (fp->_flags & __SMBF)
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_free_r (_REENT, (char *) fp->_bf._base);
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if (HASUB (fp))
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FREEUB (fp);
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if (HASLB (fp))
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FREELB (fp);
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fp->_flags = 0; /* release this FILE for reuse */
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_funlockfile(fp);
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#ifndef __SINGLE_THREAD__
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__lock_close_recursive (*(_LOCK_RECURSIVE_T *)&fp->_lock);
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#endif
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__sfp_lock_release ();
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return (r);
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}
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