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110 lines
3.9 KiB
110 lines
3.9 KiB
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
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#define ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
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#include "arena_object.h"
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#include "base/arena_allocator.h"
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#include "bit_vector.h"
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namespace art {
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class ArenaAllocator;
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class ScopedArenaAllocator;
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/*
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* A BitVector implementation that uses Arena allocation.
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*/
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class ArenaBitVector : public BitVector, public ArenaObject<kArenaAllocGrowableBitMap> {
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public:
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template <typename Allocator>
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static ArenaBitVector* Create(Allocator* allocator,
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uint32_t start_bits,
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bool expandable,
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ArenaAllocKind kind = kArenaAllocGrowableBitMap) {
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void* storage = allocator->template Alloc<ArenaBitVector>(kind);
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return new (storage) ArenaBitVector(allocator, start_bits, expandable, kind);
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}
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ArenaBitVector(ArenaAllocator* allocator,
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uint32_t start_bits,
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bool expandable,
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ArenaAllocKind kind = kArenaAllocGrowableBitMap);
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ArenaBitVector(ScopedArenaAllocator* allocator,
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uint32_t start_bits,
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bool expandable,
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ArenaAllocKind kind = kArenaAllocGrowableBitMap);
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~ArenaBitVector() {}
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ArenaBitVector(ArenaBitVector&&) = default;
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ArenaBitVector(const ArenaBitVector&) = delete;
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};
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// A BitVectorArray implementation that uses Arena allocation. See
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// BitVectorArray for more information.
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// This is a helper for dealing with 2d bit-vector arrays packed into a single
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// bit-vector
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class ArenaBitVectorArray final : public BaseBitVectorArray,
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public ArenaObject<kArenaAllocGrowableBitMap> {
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public:
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ArenaBitVectorArray(const ArenaBitVectorArray& bv) = delete;
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ArenaBitVectorArray& operator=(const ArenaBitVectorArray& other) = delete;
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explicit ArenaBitVectorArray(ArenaBitVector&& bv) : BaseBitVectorArray(), data_(std::move(bv)) {}
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ArenaBitVectorArray(ArenaBitVector&& bv, size_t cols)
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: BaseBitVectorArray(BaseBitVectorArray::MaxRowsFor(bv, cols), cols), data_(std::move(bv)) {}
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ArenaBitVectorArray(ArenaAllocator* allocator,
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size_t start_rows,
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size_t start_cols,
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bool expandable,
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ArenaAllocKind kind = kArenaAllocGrowableBitMap)
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: BaseBitVectorArray(start_rows, start_cols),
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data_(ArenaBitVector(allocator,
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BaseBitVectorArray::RequiredBitVectorSize(start_rows, start_cols),
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expandable,
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kind)) {}
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ArenaBitVectorArray(ScopedArenaAllocator* allocator,
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size_t start_rows,
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size_t start_cols,
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bool expandable,
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ArenaAllocKind kind = kArenaAllocGrowableBitMap)
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: BaseBitVectorArray(start_rows, start_cols),
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data_(ArenaBitVector(allocator,
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BaseBitVectorArray::RequiredBitVectorSize(start_rows, start_cols),
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expandable,
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kind)) {}
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~ArenaBitVectorArray() override {}
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const BitVector& GetRawData() const override {
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return data_;
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}
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BitVector& GetRawData() override {
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return data_;
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}
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private:
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ArenaBitVector data_;
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};
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} // namespace art
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#endif // ART_LIBARTBASE_BASE_ARENA_BIT_VECTOR_H_
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