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/*
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef NetworkResourceLoadScheduler_h
#define NetworkResourceLoadScheduler_h
#include "NetworkResourceLoader.h"
#include <WebCore/ResourceLoaderOptions.h>
#include <WebCore/ResourceRequest.h>
#include <WebCore/Timer.h>
#include <wtf/HashSet.h>
#if ENABLE(NETWORK_PROCESS)
namespace WebKit {
class HostRecord;
class NetworkResourceLoadParameters;
class NetworkConnectionToWebProcess;
typedef uint64_t ResourceLoadIdentifier;
class NetworkResourceLoadScheduler {
WTF_MAKE_NONCOPYABLE(NetworkResourceLoadScheduler); WTF_MAKE_FAST_ALLOCATED;
public:
NetworkResourceLoadScheduler();
// Adds the request to the queue for its host and create a unique identifier for it.
ResourceLoadIdentifier scheduleResourceLoad(const NetworkResourceLoadParameters&, NetworkConnectionToWebProcess*);
// Creates a unique identifier for an already-in-progress load.
ResourceLoadIdentifier addLoadInProgress(const WebCore::KURL&);
// Called by the WebProcess when a ResourceLoader is being cleaned up.
void removeLoadIdentifier(ResourceLoadIdentifier);
// Called within the NetworkProcess on a background thread when a resource load has finished.
void scheduleRemoveLoadIdentifier(ResourceLoadIdentifier);
void receivedRedirect(ResourceLoadIdentifier, const WebCore::KURL& redirectURL);
void servePendingRequests(WebCore::ResourceLoadPriority = WebCore::ResourceLoadPriorityVeryLow);
void suspendPendingRequests();
void resumePendingRequests();
NetworkResourceLoader* networkResourceLoaderForIdentifier(ResourceLoadIdentifier);
private:
enum CreateHostPolicy {
CreateIfNotFound,
FindOnly
};
HostRecord* hostForURL(const WebCore::KURL&, CreateHostPolicy = FindOnly);
void scheduleServePendingRequests();
void requestTimerFired(WebCore::Timer<NetworkResourceLoadScheduler>*);
void servePendingRequestsForHost(HostRecord*, WebCore::ResourceLoadPriority);
unsigned platformInitializeMaximumHTTPConnectionCountPerHost();
static void removeScheduledLoadIdentifiers(void* context);
void removeScheduledLoadIdentifiers();
HashMap<ResourceLoadIdentifier, RefPtr<NetworkResourceLoader> > m_resourceLoaders;
typedef HashMap<String, HostRecord*, StringHash> HostMap;
HostMap m_hosts;
typedef HashMap<ResourceLoadIdentifier, HostRecord*> IdentifierHostMap;
IdentifierHostMap m_identifiers;
HostRecord* m_nonHTTPProtocolHost;
unsigned m_suspendPendingRequestsCount;
bool m_isSerialLoadingEnabled;
WebCore::Timer<NetworkResourceLoadScheduler> m_requestTimer;
Mutex m_identifiersToRemoveMutex;
HashSet<ResourceLoadIdentifier> m_identifiersToRemove;
};
} // namespace WebKit
#endif // ENABLE(NETWORK_PROCESS)
#endif // NetworkResourceLoadScheduler_h
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