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author | DJ Delorie <dj@redhat.com> | 2005-04-11 19:32:04 +0000 |
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committer | DJ Delorie <dj@redhat.com> | 2005-04-11 19:32:04 +0000 |
commit | ac119ae83bf6d1a1fd5f8aa609180dacf220a3e8 (patch) | |
tree | 6d153a3e16cc15d710c5338bddf713e2e014db56 /libiberty/fopen_unlocked.c | |
parent | b5b2699cd62e27bbf96558fdfce753babba5baf0 (diff) | |
download | fsf-binutils-gdb-ac119ae83bf6d1a1fd5f8aa609180dacf220a3e8.zip fsf-binutils-gdb-ac119ae83bf6d1a1fd5f8aa609180dacf220a3e8.tar.gz fsf-binutils-gdb-ac119ae83bf6d1a1fd5f8aa609180dacf220a3e8.tar.bz2 |
merge from gcc
Diffstat (limited to 'libiberty/fopen_unlocked.c')
-rw-r--r-- | libiberty/fopen_unlocked.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libiberty/fopen_unlocked.c b/libiberty/fopen_unlocked.c new file mode 100644 index 0000000..b193dfd --- /dev/null +++ b/libiberty/fopen_unlocked.c @@ -0,0 +1,93 @@ +/* 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 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" + +FILE * +fopen_unlocked (const char *path, const char *mode) +{ + FILE *const fp = fopen (path, mode); +#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER) + if (fp) + __fsetlocking (fp, FSETLOCKING_BYCALLER); +#endif + return fp; +} + +FILE * +fdopen_unlocked (int fildes, const char *mode) +{ + FILE *const fp = fdopen (fildes, mode); +#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER) + if (fp) + __fsetlocking (fp, FSETLOCKING_BYCALLER); +#endif + return fp; +} + +FILE * +freopen_unlocked (const char *path, const char *mode, FILE *stream) +{ + FILE *const fp = freopen (path, mode, stream); +#if defined(HAVE___FSETLOCKING) && defined(FSETLOCKING_BYCALLER) + if (fp) + __fsetlocking (fp, FSETLOCKING_BYCALLER); +#endif + return fp; +} |