From 7afe555c33574655b44170af0518624aecf0f371 Mon Sep 17 00:00:00 2001
From: David Edelsohn <edelsohn@gnu.org>
Date: Tue, 28 Dec 2004 16:34:16 +0000
Subject: [PATCH] configure.host (aix4*|aix5*): Add atomic_word_dir.
* configure.host (aix4*|aix5*): Add atomic_word_dir.
* config/os/aix/atomic_word.h: New file.
From-SVN: r92673
---
libstdc++-v3/ChangeLog | 5 +++
libstdc++-v3/config/os/aix/atomic_word.h | 43 ++++++++++++++++++++++++
libstdc++-v3/configure.host | 2 ++
3 files changed, 50 insertions(+)
create mode 100644 libstdc++-v3/config/os/aix/atomic_word.h
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index da33b5de852e..65f877d00d0a 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2004-12-28 David Edelsohn <edelsohn@gnu.org>
+
+ * configure.host (aix4*|aix5*): Add atomic_word_dir.
+ * config/os/aix/atomic_word.h: New file.
+
2004-12-27 Jason Merrill <jason@redhat.com>
Add memory barriers to the double-checked locking used for static
diff --git a/libstdc++-v3/config/os/aix/atomic_word.h b/libstdc++-v3/config/os/aix/atomic_word.h
new file mode 100644
index 000000000000..5834bbc80ece
--- /dev/null
+++ b/libstdc++-v3/config/os/aix/atomic_word.h
@@ -0,0 +1,43 @@
+// Low-level type for atomic operations -*- C++ -*-
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This 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 General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _GLIBCXX_ATOMIC_WORD_H
+#define _GLIBCXX_ATOMIC_WORD_H 1
+
+typedef int _Atomic_word;
+
+#ifdef _ARCH_PPC
+#define _GLIBCXX_READ_MEM_BARRIER __asm __volatile ("isync":::"memory")
+#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
+#else
+#define _GLIBCXX_READ_MEM_BARRIER __asm __volatile ("":::"memory")
+#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("":::"memory")
+#endif
+
+#endif
diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host
index cf18e9861097..3557459426e5 100644
--- a/libstdc++-v3/configure.host
+++ b/libstdc++-v3/configure.host
@@ -155,11 +155,13 @@ case "${host_os}" in
# explicitly duplicate the directory for 4.[<3].
os_include_dir="os/aix"
atomicity_dir="os/aix"
+ atomic_word_dir="os/aix"
OPT_LDFLAGS="-Wl,-G"
;;
aix4.*)
os_include_dir="os/generic"
atomicity_dir="os/aix"
+ atomic_word_dir="os/aix"
;;
aix*)
os_include_dir="os/generic"
--
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