| /* |
| Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) |
| Copyright (C) 2001 Dirk Mueller (mueller@kde.org) |
| Copyright (C) 2002 Waldo Bastian (bastian@kde.org) |
| Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public License |
| along with this library; see the file COPYING.LIB. If not, write to |
| the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "MemoryCache.h" |
| |
| #include "CachedResource.h" |
| #include "CachedResourceHandle.h" |
| #include "CrossThreadTask.h" |
| #include "Document.h" |
| #include "FrameLoader.h" |
| #include "FrameLoaderTypes.h" |
| #include "FrameView.h" |
| #include "Image.h" |
| #include "Logging.h" |
| #include "PublicSuffix.h" |
| #include "SecurityOrigin.h" |
| #include "SecurityOriginHash.h" |
| #include "WorkerContext.h" |
| #include "WorkerLoaderProxy.h" |
| #include "WorkerThread.h" |
| #include <stdio.h> |
| #include <wtf/CurrentTime.h> |
| #include <wtf/MathExtras.h> |
| #include <wtf/TemporaryChange.h> |
| #include <wtf/text/CString.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| static const int cDefaultCacheCapacity = 8192 * 1024; |
| static const double cMinDelayBeforeLiveDecodedPrune = 1; // Seconds. |
| static const float cTargetPrunePercentage = .95f; // Percentage of capacity toward which we prune, to avoid immediately pruning again. |
| static const double cDefaultDecodedDataDeletionInterval = 0; |
| |
| MemoryCache* memoryCache() |
| { |
| static MemoryCache* staticCache = new MemoryCache; |
| ASSERT(WTF::isMainThread()); |
| |
| return staticCache; |
| } |
| |
| MemoryCache::MemoryCache() |
| : m_disabled(false) |
| , m_pruneEnabled(true) |
| , m_inPruneResources(false) |
| , m_capacity(cDefaultCacheCapacity) |
| , m_minDeadCapacity(0) |
| , m_maxDeadCapacity(cDefaultCacheCapacity) |
| , m_deadDecodedDataDeletionInterval(cDefaultDecodedDataDeletionInterval) |
| , m_liveSize(0) |
| , m_deadSize(0) |
| { |
| } |
| |
| KURL MemoryCache::removeFragmentIdentifierIfNeeded(const KURL& originalURL) |
| { |
| if (!originalURL.hasFragmentIdentifier()) |
| return originalURL; |
| // Strip away fragment identifier from HTTP URLs. |
| // Data URLs must be unmodified. For file and custom URLs clients may expect resources |
| // to be unique even when they differ by the fragment identifier only. |
| if (!originalURL.protocolIsInHTTPFamily()) |
| return originalURL; |
| KURL url = originalURL; |
| url.removeFragmentIdentifier(); |
| return url; |
| } |
| |
| bool MemoryCache::add(CachedResource* resource) |
| { |
| if (disabled()) |
| return false; |
| |
| ASSERT(WTF::isMainThread()); |
| |
| #if ENABLE(CACHE_PARTITIONING) |
| CachedResourceItem* originMap = m_resources.get(resource->url()); |
| if (!originMap) { |
| originMap = new CachedResourceItem; |
| m_resources.set(resource->url(), adoptPtr(originMap)); |
| } |
| originMap->set(resource->cachePartition(), resource); |
| #else |
| m_resources.set(resource->url(), resource); |
| #endif |
| resource->setInCache(true); |
| |
| resourceAccessed(resource); |
| |
| LOG(ResourceLoading, "MemoryCache::add Added '%s', resource %p\n", resource->url().string().latin1().data(), resource); |
| return true; |
| } |
| |
| void MemoryCache::revalidationSucceeded(CachedResource* revalidatingResource, const ResourceResponse& response) |
| { |
| CachedResource* resource = revalidatingResource->resourceToRevalidate(); |
| ASSERT(resource); |
| ASSERT(!resource->inCache()); |
| ASSERT(resource->isLoaded()); |
| ASSERT(revalidatingResource->inCache()); |
| |
| // Calling evict() can potentially delete revalidatingResource, which we use |
| // below. This mustn't be the case since revalidation means it is loaded |
| // and so canDelete() is false. |
| ASSERT(!revalidatingResource->canDelete()); |
| |
| evict(revalidatingResource); |
| |
| #if ENABLE(CACHE_PARTITIONING) |
| ASSERT(!m_resources.get(resource->url()) || !m_resources.get(resource->url())->get(resource->cachePartition())); |
| CachedResourceItem* originMap = m_resources.get(resource->url()); |
| if (!originMap) { |
| originMap = new CachedResourceItem; |
| m_resources.set(resource->url(), adoptPtr(originMap)); |
| } |
| originMap->set(resource->cachePartition(), resource); |
| #else |
| ASSERT(!m_resources.get(resource->url())); |
| m_resources.set(resource->url(), resource); |
| #endif |
| resource->setInCache(true); |
| resource->updateResponseAfterRevalidation(response); |
| insertInLRUList(resource); |
| int delta = resource->size(); |
| if (resource->decodedSize() && resource->hasClients()) |
| insertInLiveDecodedResourcesList(resource); |
| if (delta) |
| adjustSize(resource->hasClients(), delta); |
| |
| revalidatingResource->switchClientsToRevalidatedResource(); |
| ASSERT(!revalidatingResource->m_deleted); |
| // this deletes the revalidating resource |
| revalidatingResource->clearResourceToRevalidate(); |
| } |
| |
| void MemoryCache::revalidationFailed(CachedResource* revalidatingResource) |
| { |
| ASSERT(WTF::isMainThread()); |
| LOG(ResourceLoading, "Revalidation failed for %p", revalidatingResource); |
| ASSERT(revalidatingResource->resourceToRevalidate()); |
| revalidatingResource->clearResourceToRevalidate(); |
| } |
| |
| CachedResource* MemoryCache::resourceForURL(const KURL& resourceURL) |
| { |
| return resourceForRequest(ResourceRequest(resourceURL)); |
| } |
| |
| CachedResource* MemoryCache::resourceForRequest(const ResourceRequest& request) |
| { |
| ASSERT(WTF::isMainThread()); |
| KURL url = removeFragmentIdentifierIfNeeded(request.url()); |
| #if ENABLE(CACHE_PARTITIONING) |
| CachedResourceItem* item = m_resources.get(url); |
| CachedResource* resource = 0; |
| if (item) |
| resource = item->get(request.cachePartition()); |
| #else |
| CachedResource* resource = m_resources.get(url); |
| #endif |
| bool wasPurgeable = MemoryCache::shouldMakeResourcePurgeableOnEviction() && resource && resource->isPurgeable(); |
| if (resource && !resource->makePurgeable(false)) { |
| ASSERT(!resource->hasClients()); |
| evict(resource); |
| return 0; |
| } |
| // Add the size back since we had subtracted it when we marked the memory as purgeable. |
| if (wasPurgeable) |
| adjustSize(resource->hasClients(), resource->size()); |
| return resource; |
| } |
| |
| unsigned MemoryCache::deadCapacity() const |
| { |
| // Dead resource capacity is whatever space is not occupied by live resources, bounded by an independent minimum and maximum. |
| unsigned capacity = m_capacity - min(m_liveSize, m_capacity); // Start with available capacity. |
| capacity = max(capacity, m_minDeadCapacity); // Make sure it's above the minimum. |
| capacity = min(capacity, m_maxDeadCapacity); // Make sure it's below the maximum. |
| return capacity; |
| } |
| |
| unsigned MemoryCache::liveCapacity() const |
| { |
| // Live resource capacity is whatever is left over after calculating dead resource capacity. |
| return m_capacity - deadCapacity(); |
| } |
| |
| void MemoryCache::pruneLiveResources() |
| { |
| if (!m_pruneEnabled) |
| return; |
| |
| unsigned capacity = liveCapacity(); |
| if (capacity && m_liveSize <= capacity) |
| return; |
| |
| unsigned targetSize = static_cast<unsigned>(capacity * cTargetPrunePercentage); // Cut by a percentage to avoid immediately pruning again. |
| |
| pruneLiveResourcesToSize(targetSize); |
| } |
| |
| void MemoryCache::pruneLiveResourcesToPercentage(float prunePercentage) |
| { |
| if (!m_pruneEnabled) |
| return; |
| |
| if (prunePercentage < 0.0f || prunePercentage > 0.95f) |
| return; |
| |
| unsigned currentSize = m_liveSize + m_deadSize; |
| unsigned targetSize = static_cast<unsigned>(currentSize * prunePercentage); |
| |
| pruneLiveResourcesToSize(targetSize); |
| } |
| |
| void MemoryCache::pruneLiveResourcesToSize(unsigned targetSize) |
| { |
| if (m_inPruneResources) |
| return; |
| TemporaryChange<bool> reentrancyProtector(m_inPruneResources, true); |
| |
| double currentTime = FrameView::currentPaintTimeStamp(); |
| if (!currentTime) // In case prune is called directly, outside of a Frame paint. |
| currentTime = WTF::currentTime(); |
| |
| // Destroy any decoded data in live objects that we can. |
| // Start from the tail, since this is the least recently accessed of the objects. |
| |
| // The list might not be sorted by the m_lastDecodedAccessTime. The impact |
| // of this weaker invariant is minor as the below if statement to check the |
| // elapsedTime will evaluate to false as the currentTime will be a lot |
| // greater than the current->m_lastDecodedAccessTime. |
| // For more details see: https://bugs.webkit.org/show_bug.cgi?id=30209 |
| CachedResource* current = m_liveDecodedResources.m_tail; |
| while (current) { |
| CachedResource* prev = current->m_prevInLiveResourcesList; |
| ASSERT(current->hasClients()); |
| if (current->isLoaded() && current->decodedSize()) { |
| // Check to see if the remaining resources are too new to prune. |
| double elapsedTime = currentTime - current->m_lastDecodedAccessTime; |
| if (elapsedTime < cMinDelayBeforeLiveDecodedPrune) |
| return; |
| |
| // Destroy our decoded data. This will remove us from |
| // m_liveDecodedResources, and possibly move us to a different LRU |
| // list in m_allResources. |
| current->destroyDecodedData(); |
| |
| if (targetSize && m_liveSize <= targetSize) |
| return; |
| } |
| current = prev; |
| } |
| } |
| |
| void MemoryCache::pruneDeadResources() |
| { |
| if (!m_pruneEnabled) |
| return; |
| |
| unsigned capacity = deadCapacity(); |
| if (capacity && m_deadSize <= capacity) |
| return; |
| |
| unsigned targetSize = static_cast<unsigned>(capacity * cTargetPrunePercentage); // Cut by a percentage to avoid immediately pruning again. |
| pruneDeadResourcesToSize(targetSize); |
| } |
| |
| void MemoryCache::pruneDeadResourcesToPercentage(float prunePercentage) |
| { |
| if (!m_pruneEnabled) |
| return; |
| |
| if (prunePercentage < 0.0f || prunePercentage > 0.95f) |
| return; |
| |
| unsigned currentSize = m_liveSize + m_deadSize; |
| unsigned targetSize = static_cast<unsigned>(currentSize * prunePercentage); |
| |
| pruneDeadResourcesToSize(targetSize); |
| } |
| |
| void MemoryCache::pruneDeadResourcesToSize(unsigned targetSize) |
| { |
| if (m_inPruneResources) |
| return; |
| TemporaryChange<bool> reentrancyProtector(m_inPruneResources, true); |
| |
| int size = m_allResources.size(); |
| |
| // See if we have any purged resources we can evict. |
| for (int i = 0; i < size; i++) { |
| CachedResource* current = m_allResources[i].m_tail; |
| while (current) { |
| CachedResource* prev = current->m_prevInAllResourcesList; |
| if (current->wasPurged()) { |
| ASSERT(!current->hasClients()); |
| ASSERT(!current->isPreloaded()); |
| evict(current); |
| } |
| current = prev; |
| } |
| } |
| if (targetSize && m_deadSize <= targetSize) |
| return; |
| |
| bool canShrinkLRULists = true; |
| for (int i = size - 1; i >= 0; i--) { |
| // Remove from the tail, since this is the least frequently accessed of the objects. |
| CachedResource* current = m_allResources[i].m_tail; |
| |
| // First flush all the decoded data in this queue. |
| while (current) { |
| // Protect 'previous' so it can't get deleted during destroyDecodedData(). |
| CachedResourceHandle<CachedResource> previous = current->m_prevInAllResourcesList; |
| ASSERT(!previous || previous->inCache()); |
| if (!current->hasClients() && !current->isPreloaded() && current->isLoaded()) { |
| // Destroy our decoded data. This will remove us from |
| // m_liveDecodedResources, and possibly move us to a different |
| // LRU list in m_allResources. |
| current->destroyDecodedData(); |
| |
| if (targetSize && m_deadSize <= targetSize) |
| return; |
| } |
| // Decoded data may reference other resources. Stop iterating if 'previous' somehow got |
| // kicked out of cache during destroyDecodedData(). |
| if (previous && !previous->inCache()) |
| break; |
| current = previous.get(); |
| } |
| |
| // Now evict objects from this queue. |
| current = m_allResources[i].m_tail; |
| while (current) { |
| CachedResourceHandle<CachedResource> previous = current->m_prevInAllResourcesList; |
| ASSERT(!previous || previous->inCache()); |
| if (!current->hasClients() && !current->isPreloaded() && !current->isCacheValidator()) { |
| if (!makeResourcePurgeable(current)) |
| evict(current); |
| |
| if (targetSize && m_deadSize <= targetSize) |
| return; |
| } |
| if (previous && !previous->inCache()) |
| break; |
| current = previous.get(); |
| } |
| |
| // Shrink the vector back down so we don't waste time inspecting |
| // empty LRU lists on future prunes. |
| if (m_allResources[i].m_head) |
| canShrinkLRULists = false; |
| else if (canShrinkLRULists) |
| m_allResources.resize(i); |
| } |
| } |
| |
| void MemoryCache::setCapacities(unsigned minDeadBytes, unsigned maxDeadBytes, unsigned totalBytes) |
| { |
| ASSERT(minDeadBytes <= maxDeadBytes); |
| ASSERT(maxDeadBytes <= totalBytes); |
| m_minDeadCapacity = minDeadBytes; |
| m_maxDeadCapacity = maxDeadBytes; |
| m_capacity = totalBytes; |
| prune(); |
| } |
| |
| bool MemoryCache::makeResourcePurgeable(CachedResource* resource) |
| { |
| if (!MemoryCache::shouldMakeResourcePurgeableOnEviction()) |
| return false; |
| |
| if (!resource->inCache()) |
| return false; |
| |
| if (resource->isPurgeable()) |
| return true; |
| |
| if (!resource->isSafeToMakePurgeable()) |
| return false; |
| |
| if (!resource->makePurgeable(true)) |
| return false; |
| |
| adjustSize(resource->hasClients(), -static_cast<int>(resource->size())); |
| |
| return true; |
| } |
| |
| void MemoryCache::evict(CachedResource* resource) |
| { |
| ASSERT(WTF::isMainThread()); |
| LOG(ResourceLoading, "Evicting resource %p for '%s' from cache", resource, resource->url().string().latin1().data()); |
| // The resource may have already been removed by someone other than our caller, |
| // who needed a fresh copy for a reload. See <http://bugs.webkit.org/show_bug.cgi?id=12479#c6>. |
| if (resource->inCache()) { |
| // Remove from the resource map. |
| #if ENABLE(CACHE_PARTITIONING) |
| CachedResourceItem* item = m_resources.get(resource->url()); |
| if (item) { |
| item->remove(resource->cachePartition()); |
| if (!item->size()) |
| m_resources.remove(resource->url()); |
| } |
| #else |
| m_resources.remove(resource->url()); |
| #endif |
| resource->setInCache(false); |
| |
| // Remove from the appropriate LRU list. |
| removeFromLRUList(resource); |
| removeFromLiveDecodedResourcesList(resource); |
| |
| // If the resource was purged, it means we had already decremented the size when we made the |
| // resource purgeable in makeResourcePurgeable(). So adjust the size if we are evicting a |
| // resource that was not marked as purgeable. |
| if (!MemoryCache::shouldMakeResourcePurgeableOnEviction() || !resource->isPurgeable()) |
| adjustSize(resource->hasClients(), -static_cast<int>(resource->size())); |
| } else |
| #if ENABLE(CACHE_PARTITIONING) |
| ASSERT(!m_resources.get(resource->url()) || m_resources.get(resource->url())->get(resource->cachePartition()) != resource); |
| #else |
| ASSERT(m_resources.get(resource->url()) != resource); |
| #endif |
| |
| resource->deleteIfPossible(); |
| } |
| |
| MemoryCache::LRUList* MemoryCache::lruListFor(CachedResource* resource) |
| { |
| unsigned accessCount = max(resource->accessCount(), 1U); |
| unsigned queueIndex = WTF::fastLog2(resource->size() / accessCount); |
| #ifndef NDEBUG |
| resource->m_lruIndex = queueIndex; |
| #endif |
| if (m_allResources.size() <= queueIndex) |
| m_allResources.grow(queueIndex + 1); |
| return &m_allResources[queueIndex]; |
| } |
| |
| void MemoryCache::removeFromLRUList(CachedResource* resource) |
| { |
| // If we've never been accessed, then we're brand new and not in any list. |
| if (resource->accessCount() == 0) |
| return; |
| |
| #if !ASSERT_DISABLED |
| unsigned oldListIndex = resource->m_lruIndex; |
| #endif |
| |
| LRUList* list = lruListFor(resource); |
| |
| #if !ASSERT_DISABLED |
| // Verify that the list we got is the list we want. |
| ASSERT(resource->m_lruIndex == oldListIndex); |
| |
| // Verify that we are in fact in this list. |
| bool found = false; |
| for (CachedResource* current = list->m_head; current; current = current->m_nextInAllResourcesList) { |
| if (current == resource) { |
| found = true; |
| break; |
| } |
| } |
| ASSERT(found); |
| #endif |
| |
| CachedResource* next = resource->m_nextInAllResourcesList; |
| CachedResource* prev = resource->m_prevInAllResourcesList; |
| |
| if (next == 0 && prev == 0 && list->m_head != resource) |
| return; |
| |
| resource->m_nextInAllResourcesList = 0; |
| resource->m_prevInAllResourcesList = 0; |
| |
| if (next) |
| next->m_prevInAllResourcesList = prev; |
| else if (list->m_tail == resource) |
| list->m_tail = prev; |
| |
| if (prev) |
| prev->m_nextInAllResourcesList = next; |
| else if (list->m_head == resource) |
| list->m_head = next; |
| } |
| |
| void MemoryCache::insertInLRUList(CachedResource* resource) |
| { |
| // Make sure we aren't in some list already. |
| ASSERT(!resource->m_nextInAllResourcesList && !resource->m_prevInAllResourcesList); |
| ASSERT(resource->inCache()); |
| ASSERT(resource->accessCount() > 0); |
| |
| LRUList* list = lruListFor(resource); |
| |
| resource->m_nextInAllResourcesList = list->m_head; |
| if (list->m_head) |
| list->m_head->m_prevInAllResourcesList = resource; |
| list->m_head = resource; |
| |
| if (!resource->m_nextInAllResourcesList) |
| list->m_tail = resource; |
| |
| #if !ASSERT_DISABLED |
| // Verify that we are in now in the list like we should be. |
| list = lruListFor(resource); |
| bool found = false; |
| for (CachedResource* current = list->m_head; current; current = current->m_nextInAllResourcesList) { |
| if (current == resource) { |
| found = true; |
| break; |
| } |
| } |
| ASSERT(found); |
| #endif |
| |
| } |
| |
| void MemoryCache::resourceAccessed(CachedResource* resource) |
| { |
| ASSERT(resource->inCache()); |
| |
| // Need to make sure to remove before we increase the access count, since |
| // the queue will possibly change. |
| removeFromLRUList(resource); |
| |
| // If this is the first time the resource has been accessed, adjust the size of the cache to account for its initial size. |
| if (!resource->accessCount()) |
| adjustSize(resource->hasClients(), resource->size()); |
| |
| // Add to our access count. |
| resource->increaseAccessCount(); |
| |
| // Now insert into the new queue. |
| insertInLRUList(resource); |
| } |
| |
| void MemoryCache::removeResourcesWithOrigin(SecurityOrigin* origin) |
| { |
| Vector<CachedResource*> resourcesWithOrigin; |
| |
| CachedResourceMap::iterator e = m_resources.end(); |
| #if ENABLE(CACHE_PARTITIONING) |
| String originPartition = ResourceRequest::partitionName(origin->host()); |
| #endif |
| |
| for (CachedResourceMap::iterator it = m_resources.begin(); it != e; ++it) { |
| #if ENABLE(CACHE_PARTITIONING) |
| for (CachedResourceItem::iterator itemIterator = it->value->begin(); itemIterator != it->value->end(); ++itemIterator) { |
| CachedResource* resource = itemIterator->value; |
| String partition = itemIterator->key; |
| if (partition == originPartition) { |
| resourcesWithOrigin.append(resource); |
| continue; |
| } |
| #else |
| CachedResource* resource = it->value; |
| #endif |
| RefPtr<SecurityOrigin> resourceOrigin = SecurityOrigin::createFromString(resource->url()); |
| if (!resourceOrigin) |
| continue; |
| if (resourceOrigin->equal(origin)) |
| resourcesWithOrigin.append(resource); |
| #if ENABLE(CACHE_PARTITIONING) |
| } |
| #endif |
| } |
| |
| for (size_t i = 0; i < resourcesWithOrigin.size(); ++i) |
| remove(resourcesWithOrigin[i]); |
| } |
| |
| void MemoryCache::getOriginsWithCache(SecurityOriginSet& origins) |
| { |
| #if ENABLE(CACHE_PARTITIONING) |
| DEFINE_STATIC_LOCAL(String, httpString, ("http")); |
| #endif |
| CachedResourceMap::iterator e = m_resources.end(); |
| for (CachedResourceMap::iterator it = m_resources.begin(); it != e; ++it) { |
| #if ENABLE(CACHE_PARTITIONING) |
| if (it->value->begin()->key == emptyString()) |
| origins.add(SecurityOrigin::createFromString(it->value->begin()->value->url())); |
| else |
| origins.add(SecurityOrigin::create(httpString, it->value->begin()->key, 0)); |
| #else |
| origins.add(SecurityOrigin::createFromString(it->value->url())); |
| #endif |
| } |
| } |
| |
| void MemoryCache::removeFromLiveDecodedResourcesList(CachedResource* resource) |
| { |
| // If we've never been accessed, then we're brand new and not in any list. |
| if (!resource->m_inLiveDecodedResourcesList) |
| return; |
| resource->m_inLiveDecodedResourcesList = false; |
| |
| #if !ASSERT_DISABLED |
| // Verify that we are in fact in this list. |
| bool found = false; |
| for (CachedResource* current = m_liveDecodedResources.m_head; current; current = current->m_nextInLiveResourcesList) { |
| if (current == resource) { |
| found = true; |
| break; |
| } |
| } |
| ASSERT(found); |
| #endif |
| |
| CachedResource* next = resource->m_nextInLiveResourcesList; |
| CachedResource* prev = resource->m_prevInLiveResourcesList; |
| |
| if (next == 0 && prev == 0 && m_liveDecodedResources.m_head != resource) |
| return; |
| |
| resource->m_nextInLiveResourcesList = 0; |
| resource->m_prevInLiveResourcesList = 0; |
| |
| if (next) |
| next->m_prevInLiveResourcesList = prev; |
| else if (m_liveDecodedResources.m_tail == resource) |
| m_liveDecodedResources.m_tail = prev; |
| |
| if (prev) |
| prev->m_nextInLiveResourcesList = next; |
| else if (m_liveDecodedResources.m_head == resource) |
| m_liveDecodedResources.m_head = next; |
| } |
| |
| void MemoryCache::insertInLiveDecodedResourcesList(CachedResource* resource) |
| { |
| // Make sure we aren't in the list already. |
| ASSERT(!resource->m_nextInLiveResourcesList && !resource->m_prevInLiveResourcesList && !resource->m_inLiveDecodedResourcesList); |
| resource->m_inLiveDecodedResourcesList = true; |
| |
| resource->m_nextInLiveResourcesList = m_liveDecodedResources.m_head; |
| if (m_liveDecodedResources.m_head) |
| m_liveDecodedResources.m_head->m_prevInLiveResourcesList = resource; |
| m_liveDecodedResources.m_head = resource; |
| |
| if (!resource->m_nextInLiveResourcesList) |
| m_liveDecodedResources.m_tail = resource; |
| |
| #if !ASSERT_DISABLED |
| // Verify that we are in now in the list like we should be. |
| bool found = false; |
| for (CachedResource* current = m_liveDecodedResources.m_head; current; current = current->m_nextInLiveResourcesList) { |
| if (current == resource) { |
| found = true; |
| break; |
| } |
| } |
| ASSERT(found); |
| #endif |
| |
| } |
| |
| void MemoryCache::addToLiveResourcesSize(CachedResource* resource) |
| { |
| m_liveSize += resource->size(); |
| m_deadSize -= resource->size(); |
| } |
| |
| void MemoryCache::removeFromLiveResourcesSize(CachedResource* resource) |
| { |
| m_liveSize -= resource->size(); |
| m_deadSize += resource->size(); |
| } |
| |
| void MemoryCache::adjustSize(bool live, int delta) |
| { |
| if (live) { |
| ASSERT(delta >= 0 || ((int)m_liveSize + delta >= 0)); |
| m_liveSize += delta; |
| } else { |
| ASSERT(delta >= 0 || ((int)m_deadSize + delta >= 0)); |
| m_deadSize += delta; |
| } |
| } |
| |
| void MemoryCache::removeUrlFromCache(ScriptExecutionContext* context, const String& urlString) |
| { |
| removeRequestFromCache(context, ResourceRequest(urlString)); |
| } |
| |
| void MemoryCache::removeRequestFromCache(ScriptExecutionContext* context, const ResourceRequest& request) |
| { |
| #if ENABLE(WORKERS) |
| if (context->isWorkerContext()) { |
| WorkerContext* workerContext = static_cast<WorkerContext*>(context); |
| workerContext->thread()->workerLoaderProxy().postTaskToLoader(createCallbackTask(&crossThreadRemoveRequestFromCache, request)); |
| return; |
| } |
| #endif |
| |
| removeRequestFromCacheImpl(context, request); |
| } |
| |
| void MemoryCache::removeRequestFromCacheImpl(ScriptExecutionContext*, const ResourceRequest& request) |
| { |
| if (CachedResource* resource = memoryCache()->resourceForRequest(request)) |
| memoryCache()->remove(resource); |
| } |
| |
| void MemoryCache::crossThreadRemoveRequestFromCache(ScriptExecutionContext* context, PassOwnPtr<WebCore::CrossThreadResourceRequestData> requestData) |
| { |
| OwnPtr<ResourceRequest> request(ResourceRequest::adopt(requestData)); |
| MemoryCache::removeRequestFromCacheImpl(context, *request); |
| } |
| |
| void MemoryCache::TypeStatistic::addResource(CachedResource* o) |
| { |
| bool purged = o->wasPurged(); |
| bool purgeable = o->isPurgeable() && !purged; |
| int pageSize = (o->encodedSize() + o->overheadSize() + 4095) & ~4095; |
| count++; |
| size += purged ? 0 : o->size(); |
| liveSize += o->hasClients() ? o->size() : 0; |
| decodedSize += o->decodedSize(); |
| purgeableSize += purgeable ? pageSize : 0; |
| purgedSize += purged ? pageSize : 0; |
| } |
| |
| MemoryCache::Statistics MemoryCache::getStatistics() |
| { |
| Statistics stats; |
| CachedResourceMap::iterator e = m_resources.end(); |
| for (CachedResourceMap::iterator i = m_resources.begin(); i != e; ++i) { |
| #if ENABLE(CACHE_PARTITIONING) |
| for (CachedResourceItem::iterator itemIterator = i->value->begin(); itemIterator != i->value->end(); ++itemIterator) { |
| CachedResource* resource = itemIterator->value; |
| #else |
| CachedResource* resource = i->value; |
| #endif |
| switch (resource->type()) { |
| case CachedResource::ImageResource: |
| stats.images.addResource(resource); |
| break; |
| case CachedResource::CSSStyleSheet: |
| stats.cssStyleSheets.addResource(resource); |
| break; |
| case CachedResource::Script: |
| stats.scripts.addResource(resource); |
| break; |
| #if ENABLE(XSLT) |
| case CachedResource::XSLStyleSheet: |
| stats.xslStyleSheets.addResource(resource); |
| break; |
| #endif |
| case CachedResource::FontResource: |
| stats.fonts.addResource(resource); |
| break; |
| default: |
| break; |
| } |
| #if ENABLE(CACHE_PARTITIONING) |
| } |
| #endif |
| } |
| return stats; |
| } |
| |
| void MemoryCache::setDisabled(bool disabled) |
| { |
| m_disabled = disabled; |
| if (!m_disabled) |
| return; |
| |
| for (;;) { |
| CachedResourceMap::iterator outerIterator = m_resources.begin(); |
| if (outerIterator == m_resources.end()) |
| break; |
| #if ENABLE(CACHE_PARTITIONING) |
| CachedResourceItem::iterator innerIterator = outerIterator->value->begin(); |
| evict(innerIterator->value); |
| #else |
| evict(outerIterator->value); |
| #endif |
| } |
| } |
| |
| void MemoryCache::evictResources() |
| { |
| if (disabled()) |
| return; |
| |
| setDisabled(true); |
| setDisabled(false); |
| } |
| |
| void MemoryCache::prune() |
| { |
| if (m_liveSize + m_deadSize <= m_capacity && m_maxDeadCapacity && m_deadSize <= m_maxDeadCapacity) // Fast path. |
| return; |
| |
| pruneDeadResources(); // Prune dead first, in case it was "borrowing" capacity from live. |
| pruneLiveResources(); |
| } |
| |
| void MemoryCache::pruneToPercentage(float targetPercentLive) |
| { |
| pruneDeadResourcesToPercentage(targetPercentLive); // Prune dead first, in case it was "borrowing" capacity from live. |
| pruneLiveResourcesToPercentage(targetPercentLive); |
| } |
| |
| |
| #ifndef NDEBUG |
| void MemoryCache::dumpStats() |
| { |
| Statistics s = getStatistics(); |
| printf("%-13s %-13s %-13s %-13s %-13s %-13s %-13s\n", "", "Count", "Size", "LiveSize", "DecodedSize", "PurgeableSize", "PurgedSize"); |
| printf("%-13s %-13s %-13s %-13s %-13s %-13s %-13s\n", "-------------", "-------------", "-------------", "-------------", "-------------", "-------------", "-------------"); |
| printf("%-13s %13d %13d %13d %13d %13d %13d\n", "Images", s.images.count, s.images.size, s.images.liveSize, s.images.decodedSize, s.images.purgeableSize, s.images.purgedSize); |
| printf("%-13s %13d %13d %13d %13d %13d %13d\n", "CSS", s.cssStyleSheets.count, s.cssStyleSheets.size, s.cssStyleSheets.liveSize, s.cssStyleSheets.decodedSize, s.cssStyleSheets.purgeableSize, s.cssStyleSheets.purgedSize); |
| #if ENABLE(XSLT) |
| printf("%-13s %13d %13d %13d %13d %13d %13d\n", "XSL", s.xslStyleSheets.count, s.xslStyleSheets.size, s.xslStyleSheets.liveSize, s.xslStyleSheets.decodedSize, s.xslStyleSheets.purgeableSize, s.xslStyleSheets.purgedSize); |
| #endif |
| printf("%-13s %13d %13d %13d %13d %13d %13d\n", "JavaScript", s.scripts.count, s.scripts.size, s.scripts.liveSize, s.scripts.decodedSize, s.scripts.purgeableSize, s.scripts.purgedSize); |
| printf("%-13s %13d %13d %13d %13d %13d %13d\n", "Fonts", s.fonts.count, s.fonts.size, s.fonts.liveSize, s.fonts.decodedSize, s.fonts.purgeableSize, s.fonts.purgedSize); |
| printf("%-13s %-13s %-13s %-13s %-13s %-13s %-13s\n\n", "-------------", "-------------", "-------------", "-------------", "-------------", "-------------", "-------------"); |
| } |
| |
| void MemoryCache::dumpLRULists(bool includeLive) const |
| { |
| printf("LRU-SP lists in eviction order (Kilobytes decoded, Kilobytes encoded, Access count, Referenced, isPurgeable, wasPurged):\n"); |
| |
| int size = m_allResources.size(); |
| for (int i = size - 1; i >= 0; i--) { |
| printf("\n\nList %d: ", i); |
| CachedResource* current = m_allResources[i].m_tail; |
| while (current) { |
| CachedResource* prev = current->m_prevInAllResourcesList; |
| if (includeLive || !current->hasClients()) |
| printf("(%.1fK, %.1fK, %uA, %dR, %d, %d); ", current->decodedSize() / 1024.0f, (current->encodedSize() + current->overheadSize()) / 1024.0f, current->accessCount(), current->hasClients(), current->isPurgeable(), current->wasPurged()); |
| |
| current = prev; |
| } |
| } |
| } |
| #endif |
| |
| } // namespace WebCore |
