--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/os/aix/vm/libperfstat_aix.hpp	Fri Sep 06 20:16:09 2013 +0200
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2012, 2013 SAP AG. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+// encapsulates the libperfstat library.
+//
+// The purpose of this code is to dynamically load the libperfstat library
+// instead of statically linking against it. The libperfstat library is an
+// AIX-specific library which only exists on AIX, not on PASE. If I want to
+// share binaries between AIX and PASE, I cannot directly link against libperfstat.so.
+
+#ifndef OS_AIX_VM_LIBPERFSTAT_AIX_HPP
+#define OS_AIX_VM_LIBPERFSTAT_AIX_HPP
+
+#include <libperfstat.h>
+
+class libperfstat {
+
+public:
+
+  // Load the libperfstat library (must be in LIBPATH).
+  // Returns true if succeeded, false if error.
+  static bool init();
+
+  // cleanup of the libo4 porting library.
+  static void cleanup();
+
+  // direct wrappers for the libperfstat functionality. All they do is
+  // to call the functions with the same name via function pointers.
+  static int perfstat_cpu_total(perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
+                                int sizeof_userbuff, int desired_number);
+
+  static int perfstat_memory_total(perfstat_id_t *name, perfstat_memory_total_t* userbuff,
+                                   int sizeof_userbuff, int desired_number);
+
+  static void perfstat_reset();
+};
+
+#endif // OS_AIX_VM_LIBPERFSTAT_AIX_HPP