120 lines
4.0 KiB
Plaintext
120 lines
4.0 KiB
Plaintext
/*
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* Copyright (C) 2011-2015 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "config.h"
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#import "MemoryRelease.h"
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#import "FontFamilySpecificationCoreText.h"
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#import "GCController.h"
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#import "IOSurfacePool.h"
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#import "LayerPool.h"
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#import "LocaleCocoa.h"
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#import "SubimageCacheWithTimer.h"
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#import "SystemFontDatabaseCoreText.h"
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#import <notify.h>
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#import <pal/spi/ios/GraphicsServicesSPI.h>
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#if PLATFORM(IOS_FAMILY)
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#import "LegacyTileCache.h"
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#import "TileControllerMemoryHandlerIOS.h"
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#endif
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namespace WebCore {
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void platformReleaseMemory(Critical)
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{
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SystemFontDatabaseCoreText::singleton().clear();
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clearFontFamilySpecificationCoreTextCache();
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#if PLATFORM(IOS_FAMILY) && !PLATFORM(IOS_FAMILY_SIMULATOR) && !PLATFORM(MACCATALYST)
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// FIXME: Remove this call to GSFontInitialize() once <rdar://problem/32886715> is fixed.
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GSFontInitialize();
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GSFontPurgeFontCache();
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#endif
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LocaleCocoa::releaseMemory();
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for (auto& pool : LayerPool::allLayerPools())
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pool->drain();
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#if PLATFORM(IOS_FAMILY)
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LegacyTileCache::drainLayerPool();
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tileControllerMemoryHandler().trimUnparentedTilesToTarget(0);
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#endif
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IOSurfacePool::sharedPool().discardAllSurfaces();
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#if CACHE_SUBIMAGES
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SubimageCacheWithTimer::clear();
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#endif
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}
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void platformReleaseGraphicsMemory(Critical)
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{
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IOSurfacePool::sharedPool().discardAllSurfaces();
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#if CACHE_SUBIMAGES
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SubimageCacheWithTimer::clear();
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#endif
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}
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void jettisonExpensiveObjectsOnTopLevelNavigation()
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{
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#if PLATFORM(IOS_FAMILY)
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// Protect against doing excessive jettisoning during repeated navigations.
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const auto minimumTimeSinceNavigation = 2_s;
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static auto timeOfLastNavigation = MonotonicTime::now();
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auto now = MonotonicTime::now();
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bool shouldJettison = now - timeOfLastNavigation >= minimumTimeSinceNavigation;
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timeOfLastNavigation = now;
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if (!shouldJettison)
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return;
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// Throw away linked JS code. Linked code is tied to a global object and is not reusable.
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// The immediate memory savings outweigh the cost of recompilation in case we go back again.
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GCController::singleton().deleteAllLinkedCode(JSC::DeleteAllCodeIfNotCollecting);
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#endif
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}
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void registerMemoryReleaseNotifyCallbacks()
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{
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static std::once_flag onceFlag;
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std::call_once(onceFlag, [] {
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int dummy;
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notify_register_dispatch("com.apple.WebKit.fullGC", &dummy, dispatch_get_main_queue(), ^(int) {
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GCController::singleton().garbageCollectNow();
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});
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notify_register_dispatch("com.apple.WebKit.deleteAllCode", &dummy, dispatch_get_main_queue(), ^(int) {
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GCController::singleton().deleteAllCode(JSC::PreventCollectionAndDeleteAllCode);
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GCController::singleton().garbageCollectNow();
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});
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});
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}
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} // namespace WebCore
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