gecko-dev/gfx/layers/ipc/CompositorLRU.h

62 строки
1.5 KiB
C++

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