1/*
2 * Copyright (C) 2008 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef PluginMainThreadScheduler_h
27#define PluginMainThreadScheduler_h
28
29#include <wtf/Deque.h>
30#include <wtf/HashMap.h>
31#include <wtf/MainThread.h>
32#include <wtf/Threading.h>
33
34typedef struct _NPP NPP_t;
35typedef NPP_t* NPP;
36
37namespace WebCore {
38
39class PluginMainThreadScheduler {
40    WTF_MAKE_NONCOPYABLE(PluginMainThreadScheduler); WTF_MAKE_FAST_ALLOCATED;
41public:
42    typedef void MainThreadFunction(void*);
43
44    static PluginMainThreadScheduler& scheduler();
45
46    void scheduleCall(NPP, MainThreadFunction*, void* userData);
47
48    void registerPlugin(NPP);
49    void unregisterPlugin(NPP);
50
51private:
52    PluginMainThreadScheduler();
53    void dispatchCalls();
54
55    class Call;
56
57    void dispatchCallsForPlugin(NPP, const Deque<Call>& calls);
58    typedef HashMap<NPP, Deque<Call> > CallQueueMap;
59
60    static void mainThreadCallback(void* context);
61
62    class Call {
63    public:
64        Call(MainThreadFunction* function, void* userData)
65            : m_function(function)
66            , m_userData(userData)
67        {
68        }
69
70        void performCall() const
71        {
72            m_function(m_userData);
73        }
74
75    private:
76        MainThreadFunction* m_function;
77        void* m_userData;
78    };
79
80    bool m_callPending;
81    CallQueueMap m_callQueueMap;
82    Mutex m_queueMutex;
83};
84
85} // namespace WebCore
86
87#endif // PluginMainThreadScheduler_h
88