--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp	Thu Jun 05 15:57:56 2008 -0700
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2001-2007 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.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_g1SATBCardTableModRefBS.cpp.incl"
+
+G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap,
+                                                 int max_covered_regions) :
+    CardTableModRefBSForCTRS(whole_heap, max_covered_regions)
+{
+  _kind = G1SATBCT;
+}
+
+
+void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
+  if (!JavaThread::satb_mark_queue_set().active()) return;
+  Thread* thr = Thread::current();
+  if (thr->is_Java_thread()) {
+    JavaThread* jt = (JavaThread*)thr;
+    jt->satb_mark_queue().enqueue(pre_val);
+  } else {
+    MutexLocker x(Shared_SATB_Q_lock);
+    JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
+  }
+}
+
+// When we know the current java thread:
+void
+G1SATBCardTableModRefBS::write_ref_field_pre_static(void* field,
+                                                    oop newVal,
+                                                    JavaThread* jt) {
+  if (!JavaThread::satb_mark_queue_set().active()) return;
+  assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
+  oop preVal = *(oop*)field;
+  if (preVal != NULL) {
+    jt->satb_mark_queue().enqueue(preVal);
+  }
+}
+
+void
+G1SATBCardTableModRefBS::write_ref_array_pre(MemRegion mr) {
+  if (!JavaThread::satb_mark_queue_set().active()) return;
+  assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
+  oop* elem_ptr = (oop*)mr.start();
+  while ((HeapWord*)elem_ptr < mr.end()) {
+    oop elem = *elem_ptr;
+    if (elem != NULL) enqueue(elem);
+    elem_ptr++;
+  }
+}
+
+
+
+G1SATBCardTableLoggingModRefBS::
+G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
+                               int max_covered_regions) :
+  G1SATBCardTableModRefBS(whole_heap, max_covered_regions),
+  _dcqs(JavaThread::dirty_card_queue_set())
+{
+  _kind = G1SATBCTLogging;
+}
+
+void
+G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field,
+                                                     oop new_val) {
+  jbyte* byte = byte_for(field);
+  if (*byte != dirty_card) {
+    *byte = dirty_card;
+    Thread* thr = Thread::current();
+    if (thr->is_Java_thread()) {
+      JavaThread* jt = (JavaThread*)thr;
+      jt->dirty_card_queue().enqueue(byte);
+    } else {
+      MutexLockerEx x(Shared_DirtyCardQ_lock,
+                      Mutex::_no_safepoint_check_flag);
+      _dcqs.shared_dirty_card_queue()->enqueue(byte);
+    }
+  }
+}
+
+void
+G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field,
+                                                       oop new_val) {
+  uintptr_t field_uint = (uintptr_t)field;
+  uintptr_t new_val_uint = (uintptr_t)new_val;
+  uintptr_t comb = field_uint ^ new_val_uint;
+  comb = comb >> HeapRegion::LogOfHRGrainBytes;
+  if (comb == 0) return;
+  if (new_val == NULL) return;
+  // Otherwise, log it.
+  G1SATBCardTableLoggingModRefBS* g1_bs =
+    (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set();
+  g1_bs->write_ref_field_work(field, new_val);
+}
+
+void
+G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) {
+  jbyte* byte = byte_for(mr.start());
+  jbyte* last_byte = byte_for(mr.last());
+  Thread* thr = Thread::current();
+  if (whole_heap) {
+    while (byte <= last_byte) {
+      *byte = dirty_card;
+      byte++;
+    }
+  } else {
+    // Enqueue if necessary.
+    if (thr->is_Java_thread()) {
+      JavaThread* jt = (JavaThread*)thr;
+      while (byte <= last_byte) {
+        if (*byte != dirty_card) {
+          *byte = dirty_card;
+          jt->dirty_card_queue().enqueue(byte);
+        }
+        byte++;
+      }
+    } else {
+      MutexLockerEx x(Shared_DirtyCardQ_lock,
+                      Mutex::_no_safepoint_check_flag);
+      while (byte <= last_byte) {
+        if (*byte != dirty_card) {
+          *byte = dirty_card;
+          _dcqs.shared_dirty_card_queue()->enqueue(byte);
+        }
+        byte++;
+      }
+    }
+  }
+}