1/*
2 * Copyright (C) 2012 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef HostRecord_h
27#define HostRecord_h
28
29#if ENABLE(NETWORK_PROCESS)
30
31#include <WebCore/ResourceLoadPriority.h>
32#include <wtf/Deque.h>
33#include <wtf/HashSet.h>
34#include <wtf/RefCounted.h>
35#include <wtf/text/WTFString.h>
36
37namespace WebKit {
38
39class NetworkResourceLoader;
40
41typedef Deque<RefPtr<NetworkResourceLoader>> LoaderQueue;
42typedef uint64_t ResourceLoadIdentifier;
43
44class HostRecord : public RefCounted<HostRecord> {
45public:
46    static PassRefPtr<HostRecord> create(const String& name, int maxRequestsInFlight)
47    {
48        return adoptRef(new HostRecord(name, maxRequestsInFlight));
49    }
50
51    ~HostRecord();
52
53    const String& name() const { return m_name; }
54
55    void scheduleResourceLoader(PassRefPtr<NetworkResourceLoader>);
56    void addLoaderInProgress(NetworkResourceLoader*);
57    void removeLoader(NetworkResourceLoader*);
58    bool hasRequests() const;
59    void servePendingRequests(WebCore::ResourceLoadPriority);
60
61    uint64_t pendingRequestCount() const;
62    uint64_t activeLoadCount() const;
63
64private:
65    HostRecord(const String& name, int maxRequestsInFlight);
66
67    void servePendingRequestsForQueue(LoaderQueue&, WebCore::ResourceLoadPriority);
68    bool limitsRequests(WebCore::ResourceLoadPriority, NetworkResourceLoader*) const;
69
70    LoaderQueue m_loadersPending[WebCore::ResourceLoadPriorityHighest + 1];
71    LoaderQueue m_syncLoadersPending;
72
73    typedef HashSet<RefPtr<NetworkResourceLoader>> NetworkResourceLoaderSet;
74    NetworkResourceLoaderSet m_loadersInProgress;
75
76    const String m_name;
77    int m_maxRequestsInFlight;
78};
79
80} // namespace WebKit
81
82#endif // ENABLE(NETWORK_PROCESS)
83
84#endif // #ifndef HostRecord_h
85