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 000000000..70d56da0e
--- /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, 2009, 2010 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 3, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/atomic_word.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{ext/atomicity.h}
+ */
+
+#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