Add a reference table implementation.

This is suitable for pinned array references and the like.

I've also brought in some of the human-readable type printing stuff
for the benefit of the reference table dumping code.

This patch includes tests, but doesn't yet wire anything up.

Change-Id: Iaf6066201bbd254e033dee4fd0b8dfd0bc17afa9

1 files changed, 58 insertions, 0 deletions

diff --git a/src/reference_table.h b/src/reference_table.h
new file mode 100644
index 0000000000..140cc37ea1
--- /dev/null
+++ b/src/reference_table.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+
+#ifndef ART_SRC_REFERENCE_TABLE_H_
+#define ART_SRC_REFERENCE_TABLE_H_
+
+#include <cstddef>
+#include <iosfwd>
+#include <string>
+#include <vector>
+
+namespace art {
+
+class Object;
+
+#define kInvalidIndirectRefObject reinterpret_cast<Object*>(0xdead4321)
+#define kClearedJniWeakGlobal reinterpret_cast<Object*>(0xdead1234)
+
+/*
+ * Maintain a table of references.  Used for internal local references,
+ * JNI monitor references, and JNI pinned array references.
+ *
+ * None of the functions are synchronized.
+ */
+class ReferenceTable {
+ public:
+  ReferenceTable(const char* name, size_t initial_size, size_t max_size);
+
+  void Add(Object* obj);
+
+  void Remove(Object* obj);
+
+  size_t Size() const;
+
+  void Dump() const;
+
+ private:
+  std::string name_;
+  std::vector<Object*> entries_;
+  size_t max_size_;
+};
+
+}  // namespace art
+
+#endif  // ART_SRC_REFERENCE_TABLE_H_