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