Merge from transactional-memory branch.

From-SVN: r181154

1 files changed, 63 insertions, 0 deletions

diff --git a/libitm/common.h b/libitm/common.h
new file mode 100644
index 0000000..14d0efb4
--- /dev/null
+++ b/libitm/common.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
+   Contributed by Richard Henderson <rth@redhat.com>.
+
+   This file is part of the GNU Transactional Memory Library (libitm).
+
+   Libitm 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 of the License, or
+   (at your option) any later version.
+
+   Libitm 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/>.  */
+
+/* The following are internal implementation functions and definitions.
+   To distinguish them from those defined by the Intel ABI, they all
+   begin with GTM/gtm.  */
+
+#ifndef COMMON_H
+#define COMMON_H 1
+
+#define UNUSED		__attribute__((unused))
+#define ALWAYS_INLINE	__attribute__((always_inline))
+#ifdef HAVE_ATTRIBUTE_VISIBILITY
+# define HIDDEN		__attribute__((visibility("hidden")))
+#else
+# define HIDDEN
+#endif
+
+#define likely(X)	__builtin_expect((X) != 0, 1)
+#define unlikely(X)	__builtin_expect((X), 0)
+
+namespace GTM HIDDEN {
+
+// Locally defined protected allocation functions.
+//
+// To avoid dependency on libstdc++ new/delete, as well as to not
+// interfere with the wrapping of the global new/delete we wrap for
+// the user in alloc_cpp.cc, use class-local versions that defer
+// to malloc/free.  Recall that operator new/delete does not go through
+// normal lookup and so we cannot simply inject a version into the
+// GTM namespace.
+// If separate_cl is true, the allocator will try to return memory that is on
+// cache lines that are not shared with any object used by another thread.
+extern void * xmalloc (size_t s, bool separate_cl = false)
+  __attribute__((malloc, nothrow));
+extern void * xrealloc (void *p, size_t s, bool separate_cl = false)
+  __attribute__((malloc, nothrow));
+
+} // namespace GTM
+
+
+#endif // COMMON_H