Object model changes to support 64bit.

Modify mirror objects so that references between them use an ObjectReference
value type rather than an Object* so that functionality to compress larger
references can be captured in the ObjectRefererence implementation.
ObjectReferences are 32bit and all other aspects of object layout remain as
they are currently.

Expand fields in objects holding pointers so they can hold 64bit pointers. Its
expected the size of these will come down by improving where we hold compiler
meta-data.
Stub out x86_64 architecture specific runtime implementation.
Modify OutputStream so that reads and writes are of unsigned quantities.
Make the use of portable or quick code more explicit.
Templatize AtomicInteger to support more than just int32_t as a type.
Add missing, and fix issues relating to, missing annotalysis information on the
mutator lock.
Refactor and share implementations for array copy between System and uses
elsewhere in the runtime.
Fix numerous 64bit build issues.

Change-Id: I1a5694c251a42c9eff71084dfdd4b51fff716822

1 files changed, 56 insertions, 0 deletions

diff --git a/runtime/monitor_pool.cc b/runtime/monitor_pool.cc
new file mode 100644
index 0000000..eadd7a6
--- /dev/null
+++ b/runtime/monitor_pool.cc
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "monitor_pool.h"
+
+#include "base/logging.h"
+#include "base/mutex-inl.h"
+#include "monitor.h"
+
+namespace art {
+
+MonitorPool::MonitorPool() : allocated_ids_lock_("allocated monitor ids lock") {
+}
+
+Monitor* MonitorPool::LookupMonitorFromTable(MonitorId mon_id) {
+  ReaderMutexLock mu(Thread::Current(), allocated_ids_lock_);
+  return table_.Get(mon_id);
+}
+
+MonitorId MonitorPool::AllocMonitorIdFromTable(Thread* self, Monitor* mon) {
+  WriterMutexLock mu(self, allocated_ids_lock_);
+  for (size_t i = 0; i < allocated_ids_.size(); ++i) {
+    if (!allocated_ids_[i]) {
+      allocated_ids_.set(i);
+      MonitorId mon_id = i + 1;  // Zero is reserved to mean "invalid".
+      table_.Put(mon_id, mon);
+      return mon_id;
+    }
+  }
+  LOG(FATAL) << "Out of internal monitor ids";
+  return 0;
+}
+
+void MonitorPool::ReleaseMonitorIdFromTable(MonitorId mon_id) {
+  WriterMutexLock mu(Thread::Current(), allocated_ids_lock_);
+  DCHECK(table_.Get(mon_id) != nullptr);
+  table_.erase(mon_id);
+  --mon_id;  // Zero is reserved to mean "invalid".
+  DCHECK(allocated_ids_[mon_id]) << mon_id;
+  allocated_ids_.reset(mon_id);
+}
+
+}  // namespace art