1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* Copyright 2010, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
* 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 ANDROID_WEBKIT_MESSAGETHREAD_H
#define ANDROID_WEBKIT_MESSAGETHREAD_H
#include <list>
#include "MessageTypes.h"
#include <utils/threads.h>
using std::list;
namespace android {
class MessageQueue {
public:
MessageQueue() {}
// Return true if the queue has messages with the given object and member
// function. If member is null, return true if the message has the same
// object.
template <class T>
bool hasMessages(T* object, void (T::*member)(void));
// Remove all messages with the given object and member function. If
// member is null, remove all messages with the given object.
template <class T>
void remove(T* object, void (T::*member)(void));
// Post a new message to the queue.
void post(Message* closure);
// Post a new message at the front of the queue.
void postAtFront(Message* closure);
// Obtain the next message. Blocks until either a new message arrives or
// we reach the time of the next message.
Message* next();
private:
bool hasMessages(const Message& message);
void remove(const Message& message);
list<Message*> m_messages;
Mutex m_mutex;
Condition m_condition;
};
template <class T>
bool MessageQueue::hasMessages(T* object, void (T::*member)(void)) {
MemberFunctionMessage<T, void> message(object, member);
return hasMessages(message);
}
template <class T>
void MessageQueue::remove(T* object, void (T::*member)(void)) {
MemberFunctionMessage<T, void> message(object, member);
remove(message);
}
class MessageThread : public Thread {
public:
MessageQueue& queue() { return m_queue; }
private:
MessageThread() : Thread(true /* canCallJava */) {}
virtual bool threadLoop();
MessageQueue m_queue;
// Used for thread initialization
Mutex m_mutex;
Condition m_condition;
friend MessageThread* messageThread();
};
// Get (possibly creating) the global MessageThread object used to pass
// messages to WebCore.
MessageThread* messageThread();
} // namespace android
#endif // ANDROID_WEBKIT_MESSAGETHREAD_H
|
