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Bug 77999 - Part 2: Add RuleProcessorCache. r=dbaron
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,284 @@ | ||
| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | ||
| /* vim: set ts=8 sts=2 et sw=2 tw=80: */ | ||
| /* 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/. */ | ||
|
|
||
| /* | ||
| * cache of re-usable nsCSSRuleProcessors for given sets of style sheets | ||
| */ | ||
|
|
||
| #include "RuleProcessorCache.h" | ||
|
|
||
| #include <algorithm> | ||
| #include "nsCSSRuleProcessor.h" | ||
| #include "nsThreadUtils.h" | ||
|
|
||
| using namespace mozilla; | ||
|
|
||
| NS_IMPL_ISUPPORTS(RuleProcessorCache, nsIMemoryReporter) | ||
|
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| MOZ_DEFINE_MALLOC_SIZE_OF(RuleProcessorCacheMallocSizeOf) | ||
|
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| NS_IMETHODIMP | ||
| RuleProcessorCache::CollectReports(nsIHandleReportCallback* aHandleReport, | ||
| nsISupports* aData, bool aAnonymize) | ||
| { | ||
| return MOZ_COLLECT_REPORT( | ||
| "explicit/layout/rule-processor-cache", KIND_HEAP, UNITS_BYTES, | ||
| SizeOfIncludingThis(RuleProcessorCacheMallocSizeOf), | ||
| "Memory used for cached rule processors."); | ||
| } | ||
|
|
||
| RuleProcessorCache::~RuleProcessorCache() | ||
| { | ||
| UnregisterWeakMemoryReporter(this); | ||
|
|
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| for (Entry& e : mEntries) { | ||
| for (DocumentEntry& de : e.mDocumentEntries) { | ||
| if (de.mRuleProcessor->GetExpirationState()->IsTracked()) { | ||
| mExpirationTracker.RemoveObject(de.mRuleProcessor); | ||
| } | ||
| de.mRuleProcessor->SetInRuleProcessorCache(false); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| void | ||
| RuleProcessorCache::InitMemoryReporter() | ||
| { | ||
| RegisterWeakMemoryReporter(this); | ||
| } | ||
|
|
||
| /* static */ bool | ||
| RuleProcessorCache::EnsureGlobal() | ||
| { | ||
| MOZ_ASSERT(NS_IsMainThread()); | ||
|
|
||
| if (gShutdown) { | ||
| return false; | ||
| } | ||
|
|
||
| if (!gRuleProcessorCache) { | ||
| gRuleProcessorCache = new RuleProcessorCache; | ||
| gRuleProcessorCache->InitMemoryReporter(); | ||
| } | ||
| return true; | ||
| } | ||
|
|
||
| /* static */ void | ||
| RuleProcessorCache::RemoveSheet(CSSStyleSheet* aSheet) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return; | ||
| } | ||
| gRuleProcessorCache->DoRemoveSheet(aSheet); | ||
| } | ||
|
|
||
| #ifdef DEBUG | ||
| /* static */ bool | ||
| RuleProcessorCache::HasRuleProcessor(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return false; | ||
| } | ||
| return gRuleProcessorCache->DoHasRuleProcessor(aRuleProcessor); | ||
| } | ||
| #endif | ||
|
|
||
| /* static */ void | ||
| RuleProcessorCache::RemoveRuleProcessor(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return; | ||
| } | ||
| gRuleProcessorCache->DoRemoveRuleProcessor(aRuleProcessor); | ||
| } | ||
|
|
||
| /* static */ nsCSSRuleProcessor* | ||
| RuleProcessorCache::GetRuleProcessor(const nsTArray<CSSStyleSheet*>& aSheets, | ||
| nsPresContext* aPresContext) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return nullptr; | ||
| } | ||
| return gRuleProcessorCache->DoGetRuleProcessor(aSheets, aPresContext); | ||
| } | ||
|
|
||
| /* static */ void | ||
| RuleProcessorCache::PutRuleProcessor( | ||
| const nsTArray<CSSStyleSheet*>& aSheets, | ||
| nsTArray<css::DocumentRule*>&& aDocumentRulesInSheets, | ||
| const nsDocumentRuleResultCacheKey& aCacheKey, | ||
| nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return; | ||
| } | ||
| gRuleProcessorCache->DoPutRuleProcessor(aSheets, Move(aDocumentRulesInSheets), | ||
| aCacheKey, aRuleProcessor); | ||
| } | ||
|
|
||
| /* static */ void | ||
| RuleProcessorCache::StartTracking(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return; | ||
| } | ||
| return gRuleProcessorCache->DoStartTracking(aRuleProcessor); | ||
| } | ||
|
|
||
| /* static */ void | ||
| RuleProcessorCache::StopTracking(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (!EnsureGlobal()) { | ||
| return; | ||
| } | ||
| return gRuleProcessorCache->DoStopTracking(aRuleProcessor); | ||
| } | ||
|
|
||
| void | ||
| RuleProcessorCache::DoRemoveSheet(CSSStyleSheet* aSheet) | ||
| { | ||
| Entry* last = std::remove_if(mEntries.begin(), mEntries.end(), | ||
| HasSheet_ThenRemoveRuleProcessors(this, aSheet)); | ||
| mEntries.TruncateLength(last - mEntries.begin()); | ||
| } | ||
|
|
||
| nsCSSRuleProcessor* | ||
| RuleProcessorCache::DoGetRuleProcessor(const nsTArray<CSSStyleSheet*>& aSheets, | ||
| nsPresContext* aPresContext) | ||
| { | ||
| for (Entry& e : mEntries) { | ||
| if (e.mSheets == aSheets) { | ||
| for (DocumentEntry& de : e.mDocumentEntries) { | ||
| if (de.mCacheKey.Matches(aPresContext, e.mDocumentRulesInSheets)) { | ||
| return de.mRuleProcessor; | ||
| } | ||
| } | ||
| // Entry::mSheets is unique; if we matched aSheets but didn't | ||
| // find a matching DocumentEntry, we won't find one later in | ||
| // mEntries. | ||
| return nullptr; | ||
| } | ||
| } | ||
| return nullptr; | ||
| } | ||
|
|
||
| void | ||
| RuleProcessorCache::DoPutRuleProcessor( | ||
| const nsTArray<CSSStyleSheet*>& aSheets, | ||
| nsTArray<css::DocumentRule*>&& aDocumentRulesInSheets, | ||
| const nsDocumentRuleResultCacheKey& aCacheKey, | ||
| nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| MOZ_ASSERT(!aRuleProcessor->IsInRuleProcessorCache()); | ||
|
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||
| Entry* entry = nullptr; | ||
| for (Entry& e : mEntries) { | ||
| if (e.mSheets == aSheets) { | ||
| entry = &e; | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| if (!entry) { | ||
| entry = mEntries.AppendElement(); | ||
| entry->mSheets = aSheets; | ||
| entry->mDocumentRulesInSheets = aDocumentRulesInSheets; | ||
| for (CSSStyleSheet* sheet : aSheets) { | ||
| sheet->SetInRuleProcessorCache(); | ||
| } | ||
| } else { | ||
| MOZ_ASSERT(entry->mDocumentRulesInSheets == aDocumentRulesInSheets, | ||
| "DocumentRule array shouldn't have changed"); | ||
| } | ||
|
|
||
| #ifdef DEBUG | ||
| for (DocumentEntry& de : entry->mDocumentEntries) { | ||
| MOZ_ASSERT(de.mCacheKey != aCacheKey, | ||
| "should not have duplicate document cache keys"); | ||
| } | ||
| #endif | ||
|
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| DocumentEntry* documentEntry = entry->mDocumentEntries.AppendElement(); | ||
| documentEntry->mCacheKey = aCacheKey; | ||
| documentEntry->mRuleProcessor = aRuleProcessor; | ||
| aRuleProcessor->SetInRuleProcessorCache(true); | ||
| } | ||
|
|
||
| #ifdef DEBUG | ||
| bool | ||
| RuleProcessorCache::DoHasRuleProcessor(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| for (Entry& e : mEntries) { | ||
| for (DocumentEntry& de : e.mDocumentEntries) { | ||
| if (de.mRuleProcessor == aRuleProcessor) { | ||
| return true; | ||
| } | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| #endif | ||
|
|
||
| void | ||
| RuleProcessorCache::DoRemoveRuleProcessor(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| MOZ_ASSERT(aRuleProcessor->IsInRuleProcessorCache()); | ||
|
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| aRuleProcessor->SetInRuleProcessorCache(false); | ||
| mExpirationTracker.RemoveObjectIfTracked(aRuleProcessor); | ||
| for (Entry& e : mEntries) { | ||
| for (size_t i = 0; i < e.mDocumentEntries.Length(); i++) { | ||
| if (e.mDocumentEntries[i].mRuleProcessor == aRuleProcessor) { | ||
| e.mDocumentEntries.RemoveElementAt(i); | ||
| return; | ||
| } | ||
| } | ||
| } | ||
|
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| MOZ_ASSERT_UNREACHABLE("should have found rule processor"); | ||
| } | ||
|
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| void | ||
| RuleProcessorCache::DoStartTracking(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| mExpirationTracker.AddObject(aRuleProcessor); | ||
| } | ||
|
|
||
| void | ||
| RuleProcessorCache::DoStopTracking(nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| mExpirationTracker.RemoveObjectIfTracked(aRuleProcessor); | ||
| } | ||
|
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| size_t | ||
| RuleProcessorCache::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) | ||
| { | ||
| size_t n = aMallocSizeOf(this); | ||
|
|
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| int count = 0; | ||
| n += mEntries.SizeOfExcludingThis(aMallocSizeOf); | ||
| for (Entry& e : mEntries) { | ||
| n += e.mDocumentEntries.SizeOfExcludingThis(aMallocSizeOf); | ||
| for (DocumentEntry& de : e.mDocumentEntries) { | ||
| count++; | ||
| n += de.mRuleProcessor->SizeOfIncludingThis(aMallocSizeOf); | ||
| } | ||
| } | ||
|
|
||
| return n; | ||
| } | ||
|
|
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| void | ||
| RuleProcessorCache::ExpirationTracker::RemoveObjectIfTracked( | ||
| nsCSSRuleProcessor* aRuleProcessor) | ||
| { | ||
| if (aRuleProcessor->GetExpirationState()->IsTracked()) { | ||
| RemoveObject(aRuleProcessor); | ||
| } | ||
| } | ||
|
|
||
| bool RuleProcessorCache::gShutdown = false; | ||
| mozilla::StaticRefPtr<RuleProcessorCache> RuleProcessorCache::gRuleProcessorCache; |
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