1/*
2 * Copyright (C) 2009 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef DefaultSharedWorkerRepository_h
32#define DefaultSharedWorkerRepository_h
33
34#if ENABLE(SHARED_WORKERS)
35
36#include "ContentSecurityPolicy.h"
37#include <wtf/Forward.h>
38#include <wtf/HashMap.h>
39#include <wtf/Noncopyable.h>
40#include <wtf/PassOwnPtr.h>
41#include <wtf/PassRefPtr.h>
42#include <wtf/RefPtr.h>
43#include <wtf/Threading.h>
44#include <wtf/text/StringHash.h>
45
46namespace WebCore {
47
48    class Document;
49    class KURL;
50    class MessagePortChannel;
51    class ScriptExecutionContext;
52    class SharedWorker;
53    class SharedWorkerProxy;
54
55    typedef int ExceptionCode;
56
57    // Platform-specific implementation of the SharedWorkerRepository static interface.
58    class DefaultSharedWorkerRepository {
59        WTF_MAKE_NONCOPYABLE(DefaultSharedWorkerRepository); WTF_MAKE_FAST_ALLOCATED;
60    public:
61        // Returns true if the platform supports SharedWorkers, otherwise false.
62        static bool isAvailable();
63
64        // Invoked once the worker script has been loaded to fire up the worker thread.
65        void workerScriptLoaded(SharedWorkerProxy&, const String& userAgent, const String& workerScript, PassOwnPtr<MessagePortChannel>, const String& contentSecurityPolicy, ContentSecurityPolicy::HeaderType);
66
67        // Internal implementation of SharedWorkerRepository::connect()
68        void connectToWorker(PassRefPtr<SharedWorker>, PassOwnPtr<MessagePortChannel>, const KURL&, const String& name, ExceptionCode&);
69
70        // Notification that a document has been detached.
71        void documentDetached(Document*);
72
73        // Removes the passed SharedWorkerProxy from the repository.
74        void removeProxy(SharedWorkerProxy*);
75
76        bool hasSharedWorkers(Document*);
77
78        static DefaultSharedWorkerRepository& instance();
79    private:
80        DefaultSharedWorkerRepository();
81        ~DefaultSharedWorkerRepository();
82
83        PassRefPtr<SharedWorkerProxy> getProxy(const String& name, const KURL&);
84        // Mutex used to protect internal data structures.
85        Mutex m_lock;
86
87        // List of shared workers. Expectation is that there will be a limited number of shared workers, and so tracking them in a Vector is more efficient than nested HashMaps.
88        typedef Vector<RefPtr<SharedWorkerProxy> > SharedWorkerProxyRepository;
89        SharedWorkerProxyRepository m_proxies;
90    };
91
92} // namespace WebCore
93
94#endif // ENABLE(SHARED_WORKERS)
95
96#endif // DefaultSharedWorkerRepository_h
97