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39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_MEMORY_DISCARDABLE_MEMORY_ALLOCATOR_H_
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#define BASE_MEMORY_DISCARDABLE_MEMORY_ALLOCATOR_H_
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#include <stddef.h>
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#include <memory>
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#include "base/base_export.h"
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namespace base {
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class DiscardableMemory;
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class BASE_EXPORT DiscardableMemoryAllocator {
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public:
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// Returns the allocator instance.
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static DiscardableMemoryAllocator* GetInstance();
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// Sets the allocator instance. Can only be called once, e.g. on startup.
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// Ownership of |instance| remains with the caller.
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static void SetInstance(DiscardableMemoryAllocator* allocator);
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// Giant WARNING: Discardable[Shared]Memory is only implemented on Android. On
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// non-Android platforms, it behaves exactly the same as SharedMemory.
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// See LockPages() in discardable_shared_memory.cc.
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virtual std::unique_ptr<DiscardableMemory> AllocateLockedDiscardableMemory(
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size_t size) = 0;
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protected:
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virtual ~DiscardableMemoryAllocator() = default;
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};
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} // namespace base
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#endif // BASE_MEMORY_DISCARDABLE_MEMORY_ALLOCATOR_H_
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