--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/parNew/parOopClosures.inline.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+inline void ParScanWeakRefClosure::do_oop(oop* p)
+{
+  oop obj = *p;
+  assert (obj != NULL, "null weak reference?");
+  // weak references are sometimes scanned twice; must check
+  // that to-space doesn't already contain this object
+  if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) {
+    // we need to ensure that it is copied (see comment in
+    // ParScanClosure::do_oop_work).
+    klassOop objK = obj->klass();
+    markOop m = obj->mark();
+    if (m->is_marked()) { // Contains forwarding pointer.
+      *p = ParNewGeneration::real_forwardee(obj);
+    } else {
+      size_t obj_sz = obj->size_given_klass(objK->klass_part());
+      *p = ((ParNewGeneration*)_g)->copy_to_survivor_space(_par_scan_state,
+                                                           obj, obj_sz, m);
+    }
+  }
+}
+
+inline void ParScanWeakRefClosure::do_oop_nv(oop* p)
+{
+  ParScanWeakRefClosure::do_oop(p);
+}
+
+inline void ParScanClosure::par_do_barrier(oop* p) {
+  assert(generation()->is_in_reserved(p), "expected ref in generation");
+  oop obj = *p;
+  assert(obj != NULL, "expected non-null object");
+  // If p points to a younger generation, mark the card.
+  if ((HeapWord*)obj < gen_boundary()) {
+    rs()->write_ref_field_gc_par(p, obj);
+  }
+}
+
+inline void ParScanClosure::do_oop_work(oop* p,
+                                        bool gc_barrier,
+                                        bool root_scan) {
+  oop obj = *p;
+  assert((!Universe::heap()->is_in_reserved(p) ||
+          generation()->is_in_reserved(p))
+         && (generation()->level() == 0 || gc_barrier),
+         "The gen must be right, and we must be doing the barrier "
+         "in older generations.");
+  if (obj != NULL) {
+    if ((HeapWord*)obj < _boundary) {
+      assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?");
+      // OK, we need to ensure that it is copied.
+      // We read the klass and mark in this order, so that we can reliably
+      // get the size of the object: if the mark we read is not a
+      // forwarding pointer, then the klass is valid: the klass is only
+      // overwritten with an overflow next pointer after the object is
+      // forwarded.
+      klassOop objK = obj->klass();
+      markOop m = obj->mark();
+      if (m->is_marked()) { // Contains forwarding pointer.
+        *p = ParNewGeneration::real_forwardee(obj);
+      } else {
+        size_t obj_sz = obj->size_given_klass(objK->klass_part());
+        *p = _g->copy_to_survivor_space(_par_scan_state, obj, obj_sz, m);
+        if (root_scan) {
+          // This may have pushed an object.  If we have a root
+          // category with a lot of roots, can't let the queue get too
+          // full:
+          (void)_par_scan_state->trim_queues(10 * ParallelGCThreads);
+        }
+      }
+      if (gc_barrier) {
+        // Now call parent closure
+        par_do_barrier(p);
+      }
+    }
+  }
+}