2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
3 Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
4 Copyright (C) 2004, 2006, 2007, 2008 Apple Inc. All rights reserved.
5 Copyright (C) 2010 Google Inc. All rights reserved.
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public License
18 along with this library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA.
23 #ifndef ResourceLoadScheduler_h
24 #define ResourceLoadScheduler_h
26 #include "FrameLoaderTypes.h"
27 #include "PlatformString.h"
28 #include "ResourceLoadPriority.h"
30 #include <wtf/Deque.h>
31 #include <wtf/HashMap.h>
32 #include <wtf/HashSet.h>
33 #include <wtf/Noncopyable.h>
34 #include <wtf/text/StringHash.h>
35 #include <wtf/text/WTFString.h>
41 class NetscapePlugInStreamLoader;
42 class NetscapePlugInStreamLoaderClient;
44 class ResourceRequest;
45 class SubresourceLoader;
46 class SubresourceLoaderClient;
48 class ResourceLoadScheduler {
49 WTF_MAKE_NONCOPYABLE(ResourceLoadScheduler);
51 friend ResourceLoadScheduler* resourceLoadScheduler();
53 PassRefPtr<SubresourceLoader> scheduleSubresourceLoad(Frame*, SubresourceLoaderClient*, const ResourceRequest&, ResourceLoadPriority = ResourceLoadPriorityLow, SecurityCheckPolicy = DoSecurityCheck, bool sendResourceLoadCallbacks = true, bool shouldContentSniff = true, const String& optionalOutgoingReferrer = String(), bool shouldBufferData = true);
54 PassRefPtr<NetscapePlugInStreamLoader> schedulePluginStreamLoad(Frame*, NetscapePlugInStreamLoaderClient*, const ResourceRequest&);
55 void addMainResourceLoad(ResourceLoader*);
56 void remove(ResourceLoader*);
57 void crossOriginRedirectReceived(ResourceLoader*, const KURL& redirectURL);
59 void servePendingRequests(ResourceLoadPriority minimumPriority = ResourceLoadPriorityVeryLow);
60 void suspendPendingRequests();
61 void resumePendingRequests();
63 bool isSerialLoadingEnabled() const { return m_isSerialLoadingEnabled; }
64 void setSerialLoadingEnabled(bool b) { m_isSerialLoadingEnabled = b; }
67 ResourceLoadScheduler();
68 ~ResourceLoadScheduler();
70 void scheduleLoad(ResourceLoader*, ResourceLoadPriority);
71 void scheduleServePendingRequests();
72 void requestTimerFired(Timer<ResourceLoadScheduler>*);
74 class HostInformation {
75 WTF_MAKE_NONCOPYABLE(HostInformation);
77 HostInformation(const String&, unsigned);
80 const String& name() const { return m_name; }
81 void schedule(ResourceLoader*, ResourceLoadPriority = ResourceLoadPriorityVeryLow);
82 void addLoadInProgress(ResourceLoader*);
83 void remove(ResourceLoader*);
84 bool hasRequests() const;
85 bool limitRequests(ResourceLoadPriority) const;
87 typedef Deque<RefPtr<ResourceLoader> > RequestQueue;
88 RequestQueue& requestsPending(ResourceLoadPriority priority) { return m_requestsPending[priority]; }
91 RequestQueue m_requestsPending[ResourceLoadPriorityHighest + 1];
92 typedef HashSet<RefPtr<ResourceLoader> > RequestMap;
93 RequestMap m_requestsLoading;
95 const int m_maxRequestsInFlight;
98 enum CreateHostPolicy {
103 HostInformation* hostForURL(const KURL&, CreateHostPolicy = FindOnly);
104 void servePendingRequests(HostInformation*, ResourceLoadPriority);
106 typedef HashMap<String, HostInformation*, StringHash> HostMap;
108 HostInformation* m_nonHTTPProtocolHost;
110 Timer<ResourceLoadScheduler> m_requestTimer;
112 bool m_isSuspendingPendingRequests;
113 bool m_isSerialLoadingEnabled;
116 ResourceLoadScheduler* resourceLoadScheduler();