upload android base code part3

android/art/runtime/base/arena_bit_vector.cc

@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2011 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 "arena_bit_vector.h"
+
+#include "base/allocator.h"
+#include "base/arena_allocator.h"
+
+namespace art {
+
+template <bool kCount>
+class ArenaBitVectorAllocatorKindImpl;
+
+template <>
+class ArenaBitVectorAllocatorKindImpl<false> {
+ public:
+  // Not tracking allocations, ignore the supplied kind and arbitrarily provide kArenaAllocSTL.
+  explicit ArenaBitVectorAllocatorKindImpl(ArenaAllocKind kind ATTRIBUTE_UNUSED) {}
+  ArenaBitVectorAllocatorKindImpl(const ArenaBitVectorAllocatorKindImpl&) = default;
+  ArenaBitVectorAllocatorKindImpl& operator=(const ArenaBitVectorAllocatorKindImpl&) = default;
+  ArenaAllocKind Kind() { return kArenaAllocGrowableBitMap; }
+};
+
+template <bool kCount>
+class ArenaBitVectorAllocatorKindImpl {
+ public:
+  explicit ArenaBitVectorAllocatorKindImpl(ArenaAllocKind kind) : kind_(kind) { }
+  ArenaBitVectorAllocatorKindImpl(const ArenaBitVectorAllocatorKindImpl&) = default;
+  ArenaBitVectorAllocatorKindImpl& operator=(const ArenaBitVectorAllocatorKindImpl&) = default;
+  ArenaAllocKind Kind() { return kind_; }
+
+ private:
+  ArenaAllocKind kind_;
+};
+
+using ArenaBitVectorAllocatorKind =
+    ArenaBitVectorAllocatorKindImpl<kArenaAllocatorCountAllocations>;
+
+template <typename ArenaAlloc>
+class ArenaBitVectorAllocator FINAL : public Allocator, private ArenaBitVectorAllocatorKind {
+ public:
+  static ArenaBitVectorAllocator* Create(ArenaAlloc* arena, ArenaAllocKind kind) {
+    void* storage = arena->template Alloc<ArenaBitVectorAllocator>(kind);
+    return new (storage) ArenaBitVectorAllocator(arena, kind);
+  }
+
+  ~ArenaBitVectorAllocator() {
+    LOG(FATAL) << "UNREACHABLE";
+    UNREACHABLE();
+  }
+
+  virtual void* Alloc(size_t size) {
+    return arena_->Alloc(size, this->Kind());
+  }
+
+  virtual void Free(void*) {}  // Nop.
+
+ private:
+  ArenaBitVectorAllocator(ArenaAlloc* arena, ArenaAllocKind kind)
+      : ArenaBitVectorAllocatorKind(kind), arena_(arena) { }
+
+  ArenaAlloc* const arena_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArenaBitVectorAllocator);
+};
+
+ArenaBitVector::ArenaBitVector(ArenaAllocator* arena,
+                               unsigned int start_bits,
+                               bool expandable,
+                               ArenaAllocKind kind)
+  :  BitVector(start_bits,
+               expandable,
+               ArenaBitVectorAllocator<ArenaAllocator>::Create(arena, kind)) {
+}
+
+ArenaBitVector::ArenaBitVector(ScopedArenaAllocator* arena,
+                               unsigned int start_bits,
+                               bool expandable,
+                               ArenaAllocKind kind)
+  :  BitVector(start_bits,
+               expandable,
+               ArenaBitVectorAllocator<ScopedArenaAllocator>::Create(arena, kind)) {
+}
+
+}  // namespace art