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62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_CompositorLRU_h
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#define mozilla_CompositorLRU_h
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#include "mozilla/StaticPtr.h"
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#include "nsISupportsImpl.h"
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#include "nsTArray.h"
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#include <utility>
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namespace mozilla {
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namespace layers {
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class PCompositorParent;
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class CompositorLRU final
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{
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typedef std::pair<PCompositorParent*, uint64_t> CompositorLayerPair;
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorLRU)
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static void Init();
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static CompositorLRU* GetSingleton();
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/**
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* Adds the (PCompositorParent, LayerId) pair to the LRU pool. If
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* the pool size grows over mLRUSize, the oldest PCompositorParent
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* is evicted.
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*/
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void Add(PCompositorParent* aCompositor, const uint64_t& id);
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/**
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* Remove the (PCompositorParent, LayersId) pair from the LRU pool.
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*/
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void Remove(PCompositorParent* aCompositor, const uint64_t& id);
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/**
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* Remove all PCompositorParents from the LRU pool.
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*/
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void Remove(PCompositorParent* aCompositor);
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private:
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static StaticRefPtr<CompositorLRU> sSingleton;
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CompositorLRU();
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~CompositorLRU();
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uint32_t mLRUSize;
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nsTArray<CompositorLayerPair> mLRU;
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};
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} // namespace layers
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} // namespace mozilla
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#endif // mozilla_CompositorLRU_h
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