mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-03 17:51:57 +00:00
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/* Implement fopen_unlocked and related functions.
|
|
Copyright (C) 2005 Free Software Foundation, Inc.
|
|
Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
|
|
|
|
This file is part of the libiberty library.
|
|
Libiberty is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
Libiberty is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with libiberty; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/*
|
|
|
|
@deftypefn Extension void unlock_stream (FILE * @var{stream})
|
|
|
|
If the OS supports it, ensure that the supplied stream is setup to
|
|
avoid any multi-threaded locking. Otherwise leave the @code{FILE}
|
|
pointer unchanged. If the @var{stream} is @code{NULL} do nothing.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension void unlock_std_streams (void)
|
|
|
|
If the OS supports it, ensure that the standard I/O streams,
|
|
@code{stdin}, @code{stdout} and @code{stderr} are setup to avoid any
|
|
multi-threaded locking. Otherwise do nothing.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension FILE * fopen_unlocked (const char *@var{path}, const char * @var{mode})
|
|
|
|
Opens and returns a @code{FILE} pointer via @code{fopen}. If the
|
|
operating system supports it, ensure that the stream is setup to avoid
|
|
any multi-threaded locking. Otherwise return the @code{FILE} pointer
|
|
unchanged.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension FILE * fdopen_unlocked (int @var{fildes}, const char * @var{mode})
|
|
|
|
Opens and returns a @code{FILE} pointer via @code{fdopen}. If the
|
|
operating system supports it, ensure that the stream is setup to avoid
|
|
any multi-threaded locking. Otherwise return the @code{FILE} pointer
|
|
unchanged.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension FILE * freopen_unlocked (const char * @var{path}, const char * @var{mode}, FILE * @var{stream})
|
|
|
|
Opens and returns a @code{FILE} pointer via @code{freopen}. If the
|
|
operating system supports it, ensure that the stream is setup to avoid
|
|
any multi-threaded locking. Otherwise return the @code{FILE} pointer
|
|
unchanged.
|
|
|
|
@end deftypefn
|
|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#include <stdio.h>
|
|
#ifdef HAVE_STDIO_EXT_H
|
|
#include <stdio_ext.h>
|
|
#endif
|
|
|
|
#include "libiberty.h"
|
|
|
|
/* This is an inline helper function to consolidate attempts to unlock
|
|
a stream. */
|
|
|
|
static inline void
|
|
unlock_1 (FILE *const fp ATTRIBUTE_UNUSED)
|
|
{
|
|
#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER)
|
|
if (fp)
|
|
__fsetlocking (fp, FSETLOCKING_BYCALLER);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
unlock_stream (FILE *fp)
|
|
{
|
|
unlock_1 (fp);
|
|
}
|
|
|
|
void
|
|
unlock_std_streams (void)
|
|
{
|
|
unlock_1 (stdin);
|
|
unlock_1 (stdout);
|
|
unlock_1 (stderr);
|
|
}
|
|
|
|
FILE *
|
|
fopen_unlocked (const char *path, const char *mode)
|
|
{
|
|
FILE *const fp = fopen (path, mode);
|
|
unlock_1 (fp);
|
|
return fp;
|
|
}
|
|
|
|
FILE *
|
|
fdopen_unlocked (int fildes, const char *mode)
|
|
{
|
|
FILE *const fp = fdopen (fildes, mode);
|
|
unlock_1 (fp);
|
|
return fp;
|
|
}
|
|
|
|
FILE *
|
|
freopen_unlocked (const char *path, const char *mode, FILE *stream)
|
|
{
|
|
FILE *const fp = freopen (path, mode, stream);
|
|
unlock_1 (fp);
|
|
return fp;
|
|
}
|