upload android base code part3

android/art/runtime/base/arena_bit_vector.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2013 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_RUNTIME_BASE_ARENA_BIT_VECTOR_H_
+#define ART_RUNTIME_BASE_ARENA_BIT_VECTOR_H_
+
+#include "base/arena_object.h"
+#include "base/bit_vector.h"
+
+namespace art {
+
+class ArenaAllocator;
+class ScopedArenaAllocator;
+
+/*
+ * A BitVector implementation that uses Arena allocation.
+ */
+class ArenaBitVector : public BitVector, public ArenaObject<kArenaAllocGrowableBitMap> {
+ public:
+  template <typename Allocator>
+  static ArenaBitVector* Create(Allocator* arena,
+                                uint32_t start_bits,
+                                bool expandable,
+                                ArenaAllocKind kind = kArenaAllocGrowableBitMap) {
+    void* storage = arena->template Alloc<ArenaBitVector>(kind);
+    return new (storage) ArenaBitVector(arena, start_bits, expandable, kind);
+  }
+
+  ArenaBitVector(ArenaAllocator* arena,
+                 uint32_t start_bits,
+                 bool expandable,
+                 ArenaAllocKind kind = kArenaAllocGrowableBitMap);
+  ArenaBitVector(ScopedArenaAllocator* arena,
+                 uint32_t start_bits,
+                 bool expandable,
+                 ArenaAllocKind kind = kArenaAllocGrowableBitMap);
+  ~ArenaBitVector() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ArenaBitVector);
+};
+
+}  // namespace art
+
+#endif  // ART_RUNTIME_BASE_ARENA_BIT_VECTOR_H_