diff options
| author | Thomas Schwinge <thomas@codesourcery.com> | 2012-08-07 22:36:56 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2012-08-07 22:58:34 +0200 |
| commit | af7d78e726cb0d3248c461cfee27fe15121dacd1 (patch) | |
| tree | 3793752ac3159ff6e4bd68fd1dead446b1e3ea7c /sysdeps/i386/bits/memory.h | |
| parent | a5387f6a45d6b3f2b381d861f5c288b79da6204f (diff) | |
Rename ia32 sysdep directories to i386.
* sysdeps/i386/Implies: Remove file.
* sysdeps/mach/hurd/i386/Implies: Likewise.
* sysdeps/ia32/bits/memory.h: Rename to sysdeps/i386/bits/memory.h.
* sysdeps/ia32/bits/pt-atomic.h: Rename to sysdeps/i386/bits/pt-atomic.h.
* sysdeps/ia32/bits/spin-lock-inline.h: Rename to
sysdeps/i386/bits/spin-lock-inline.h.
* sysdeps/ia32/bits/spin-lock.h: Rename to sysdeps/i386/bits/spin-lock.h.
* sysdeps/ia32/machine-sp.h: Rename to sysdeps/i386/machine-sp.h.
* sysdeps/ia32/pt-machdep.h: Rename to sysdeps/i386/pt-machdep.h.
* sysdeps/mach/hurd/ia32/pt-machdep.c: Rename to
sysdeps/mach/hurd/i386/pt-machdep.c.
* sysdeps/mach/hurd/ia32/pt-setup.c: Rename to
sysdeps/mach/hurd/i386/pt-setup.c.
* Makefile (SYSDEP_PATH): Adapt to that.
Diffstat (limited to 'sysdeps/i386/bits/memory.h')
| -rw-r--r-- | sysdeps/i386/bits/memory.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/i386/bits/memory.h b/sysdeps/i386/bits/memory.h new file mode 100644 index 0000000..932c408 --- /dev/null +++ b/sysdeps/i386/bits/memory.h @@ -0,0 +1,40 @@ +/* Memory barrier operations. i386 version. + Copyright (C) 2002, 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library 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. + + The GNU C Library 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 the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _BITS_MEMORY_H +#define _BITS_MEMORY_H 1 + +/* Prevent read and write reordering across this function. */ +static inline void +__memory_barrier (void) +{ + int i; + + /* Any lock'ed instruction will do. We just do a simple + increment. */ + __asm__ __volatile ("lock; incl %0" : "=m" (i) : "m" (i) : "memory"); +} + +/* Prevent read reordering across this function. */ +#define __memory_read_barrier __memory_barrier + +/* Prevent write reordering across this function. */ +#define __memory_write_barrier __memory_barrier + +#endif |