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

102 строки
2.1 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/. */
#include "CompositorLRU.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Preferences.h"
#include "mozilla/unused.h"
#include "CompositorParent.h"
namespace mozilla {
namespace layers {
mozilla::StaticRefPtr<CompositorLRU> CompositorLRU::sSingleton;
void
CompositorLRU::Init()
{
Unused << GetSingleton();
}
CompositorLRU*
CompositorLRU::GetSingleton()
{
if (sSingleton) {
return sSingleton;
}
sSingleton = new CompositorLRU();
ClearOnShutdown(&sSingleton);
return sSingleton;
}
CompositorLRU::CompositorLRU()
{
mLRUSize = Preferences::GetUint("layers.compositor-lru-size", uint32_t(0));
}
CompositorLRU::~CompositorLRU()
{
}
void
CompositorLRU::Add(PCompositorParent* aCompositor, const uint64_t& aId)
{
auto index = mLRU.IndexOf(std::make_pair(aCompositor, aId));
if (index != nsTArray<CompositorLayerPair>::NoIndex) {
return;
}
if (mLRUSize == 0) {
Unused << aCompositor->SendClearCachedResources(aId);
return;
}
if (mLRU.Length() == mLRUSize) {
CompositorLayerPair victim = mLRU.LastElement();
Unused << victim.first->SendClearCachedResources(victim.second);
mLRU.RemoveElement(victim);
}
mLRU.InsertElementAt(0, std::make_pair(aCompositor, aId));
}
void
CompositorLRU::Remove(PCompositorParent* aCompositor, const uint64_t& aId)
{
if (mLRUSize == 0) {
return;
}
auto index = mLRU.IndexOf(std::make_pair(aCompositor, aId));
if (index == nsTArray<PCompositorParent*>::NoIndex) {
return;
}
mLRU.RemoveElementAt(index);
}
void
CompositorLRU::Remove(PCompositorParent* aCompositor)
{
if (mLRUSize == 0) {
return;
}
for (int32_t i = mLRU.Length() - 1; i >= 0; --i) {
if (mLRU[i].first == aCompositor) {
mLRU.RemoveElementAt(i);
}
}
}
} // namespace layers
} // namespace mozilla