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author | No Author <no-author@gcc.gnu.org> | 2005-04-17 03:54:04 +0000 |
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committer | No Author <no-author@gcc.gnu.org> | 2005-04-17 03:54:04 +0000 |
commit | 5ed6b2a64391192de9dae0febe70c801435e9f1f (patch) | |
tree | 8e139cb5b60e4776090cd81b665e1045cb2e750e | |
parent | a380773abf802149e29fda4e1e95a589f9484880 (diff) | |
download | gcc-5ed6b2a64391192de9dae0febe70c801435e9f1f.tar.gz |
This commit was manufactured by cvs2svn to create branch
'gcc-4_0-branch'.
From-SVN: r98254
-rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/pr20739.c | 24 | ||||
-rw-r--r-- | libiberty/fopen_unlocked.c | 110 |
2 files changed, 134 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr20739.c b/gcc/testsuite/gcc.dg/tree-ssa/pr20739.c new file mode 100644 index 00000000000..c1e7b58e385 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr20739.c @@ -0,0 +1,24 @@ +/* PR middle-end/20739 */ + +/* dg-do compile */ +/* dg-options "-O" */ + +/* We used to fail to compile this because gimplification dropped the + conversion that added the const qualifier to the sub-expression + involving baz, and then immediately noticed and reported its + absence. */ + +typedef struct +{ + char chars[5]; +} +baz_t; + +extern baz_t * baz; + +extern void foo (baz_t); +int +bar (const baz_t * ls) +{ + foo (ls == 0 ? *(&baz[0]) : *ls); +} diff --git a/libiberty/fopen_unlocked.c b/libiberty/fopen_unlocked.c new file mode 100644 index 00000000000..8f9f300d101 --- /dev/null +++ b/libiberty/fopen_unlocked.c @@ -0,0 +1,110 @@ +/* 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 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); +} + +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; +} |