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77 lines
2.7 KiB
77 lines
2.7 KiB
// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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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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#pragma once
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#include <memory>
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#include "paddle/fluid/memory/allocation/allocator.h"
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namespace paddle {
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namespace memory {
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namespace allocation {
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// An allocator to wrap an UnmanagedAllocator and make the allocation managed
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// by C++ smart ptr.
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//
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// NOTE: if the NaiveManagedAllocator is destroyed before
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// NaiveManagedAllocations, the allocation will never be released.
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class NaiveManagedAllocator;
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class NaiveManagedAllocation : public Allocation {
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public:
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NaiveManagedAllocation(std::unique_ptr<Allocation>&& underlying_allocation,
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std::shared_ptr<NaiveManagedAllocator> allocator)
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: Allocation(underlying_allocation->ptr(), underlying_allocation->size(),
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underlying_allocation->place()),
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underlying_allocation_(std::move(underlying_allocation)),
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allocator_(allocator) {}
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~NaiveManagedAllocation() final;
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private:
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std::unique_ptr<Allocation> underlying_allocation_;
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std::weak_ptr<NaiveManagedAllocator> allocator_;
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};
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class NaiveManagedAllocator
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: public ManagedAllocator,
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public std::enable_shared_from_this<NaiveManagedAllocator> {
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public:
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template <typename... ARGS>
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static std::shared_ptr<ManagedAllocator> Create(ARGS... args) {
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return std::static_pointer_cast<ManagedAllocator>(
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std::shared_ptr<NaiveManagedAllocator>(
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new NaiveManagedAllocator(std::move(args)...)));
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}
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inline UnmanagedAllocator& UnderlyingAllocator() {
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return *underlying_allocator_;
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}
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bool IsAllocThreadSafe() const override;
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std::unique_ptr<Allocation> Allocate(size_t size,
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Attr attr = kDefault) override;
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std::shared_ptr<Allocation> AllocateShared(size_t size,
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Attr attr = kDefault) override;
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private:
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explicit NaiveManagedAllocator(std::unique_ptr<Allocator>&& allocator);
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explicit NaiveManagedAllocator(
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std::unique_ptr<UnmanagedAllocator>&& allocator);
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void Init(std::unique_ptr<UnmanagedAllocator>&& allocator);
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std::unique_ptr<UnmanagedAllocator> underlying_allocator_;
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};
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} // namespace allocation
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} // namespace memory
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} // namespace paddle
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