src/hotspot/share/gc/shenandoah/shenandoahBrooksPointer.inline.hpp
changeset 52925 9c18c9d839d3
child 53244 9807daeb47c4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahBrooksPointer.inline.hpp	Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.
+ *
+ * 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.
+ *
+ */
+
+#ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP
+#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP
+
+#include "gc/shenandoah/shenandoahAsserts.hpp"
+#include "gc/shenandoah/shenandoahBrooksPointer.hpp"
+#include "runtime/atomic.hpp"
+
+inline HeapWord** ShenandoahBrooksPointer::brooks_ptr_addr(oop obj) {
+  return (HeapWord**)((HeapWord*) obj + word_offset());
+}
+
+inline void ShenandoahBrooksPointer::initialize(oop obj) {
+  shenandoah_assert_in_heap(NULL, obj);
+  *brooks_ptr_addr(obj) = (HeapWord*) obj;
+}
+
+inline void ShenandoahBrooksPointer::set_raw(oop obj, HeapWord* update) {
+  shenandoah_assert_in_heap(NULL, obj);
+  *brooks_ptr_addr(obj) = update;
+}
+
+inline HeapWord* ShenandoahBrooksPointer::get_raw(oop obj) {
+  shenandoah_assert_in_heap(NULL, obj);
+  return *brooks_ptr_addr(obj);
+}
+
+inline HeapWord* ShenandoahBrooksPointer::get_raw_unchecked(oop obj) {
+  return *brooks_ptr_addr(obj);
+}
+
+inline oop ShenandoahBrooksPointer::forwardee(oop obj) {
+  shenandoah_assert_correct(NULL, obj);
+  return oop(*brooks_ptr_addr(obj));
+}
+
+inline oop ShenandoahBrooksPointer::try_update_forwardee(oop obj, oop update) {
+  oop result = (oop) Atomic::cmpxchg(update, (oop*)brooks_ptr_addr(obj), obj);
+  shenandoah_assert_correct_except(NULL, obj, !oopDesc::equals_raw(result, obj));
+  return result;
+}
+
+#endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHBROOKSPOINTER_INLINE_HPP