* configure.host (aix4*|aix5*): Add atomic_word_dir.

	* config/os/aix/atomic_word.h: New file.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92673 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 43 insertions, 0 deletions

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 00000000000..5834bbc80ec
--- /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