1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
18 #define ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
19 
20 #include "arena_object.h"
21 #include "bit_vector.h"
22 
23 namespace art {
24 
25 class ArenaAllocator;
26 class ScopedArenaAllocator;
27 
28 /*
29  * A BitVector implementation that uses Arena allocation.
30  */
31 class ArenaBitVector : public BitVector, public ArenaObject<kArenaAllocGrowableBitMap> {
32  public:
33   template <typename Allocator>
34   static ArenaBitVector* Create(Allocator* allocator,
35                                 uint32_t start_bits,
36                                 bool expandable,
37                                 ArenaAllocKind kind = kArenaAllocGrowableBitMap) {
38     void* storage = allocator->template Alloc<ArenaBitVector>(kind);
39     return new (storage) ArenaBitVector(allocator, start_bits, expandable, kind);
40   }
41 
42   ArenaBitVector(ArenaAllocator* allocator,
43                  uint32_t start_bits,
44                  bool expandable,
45                  ArenaAllocKind kind = kArenaAllocGrowableBitMap);
46   ArenaBitVector(ScopedArenaAllocator* allocator,
47                  uint32_t start_bits,
48                  bool expandable,
49                  ArenaAllocKind kind = kArenaAllocGrowableBitMap);
~ArenaBitVector()50   ~ArenaBitVector() {}
51 
52  private:
53   DISALLOW_COPY_AND_ASSIGN(ArenaBitVector);
54 };
55 
56 }  // namespace art
57 
58 #endif  // ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
59