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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 APPLE OR ITS 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 DatabaseTask_h
#define DatabaseTask_h
#include "ExceptionCode.h"
#include "PlatformString.h"
#include "Threading.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class Database;
class DatabaseThread;
class SQLValue;
class SQLCallback;
class SQLTransaction;
class VersionChangeCallback;
class DatabaseTask : public ThreadSafeShared<DatabaseTask>
{
friend class Database;
public:
virtual ~DatabaseTask();
void performTask();
Database* database() const { return m_database; }
bool isComplete() const { return m_complete; }
protected:
DatabaseTask(Database*);
private:
virtual void doPerformTask() = 0;
#ifndef NDEBUG
virtual const char* debugTaskName() const = 0;
#endif
void lockForSynchronousScheduling();
void waitForSynchronousCompletion();
Database* m_database;
bool m_complete;
OwnPtr<Mutex> m_synchronousMutex;
OwnPtr<ThreadCondition> m_synchronousCondition;
};
class DatabaseOpenTask : public DatabaseTask
{
public:
DatabaseOpenTask(Database*);
ExceptionCode exceptionCode() const { return m_code; }
bool openSuccessful() const { return m_success; }
private:
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
ExceptionCode m_code;
bool m_success;
};
class DatabaseCloseTask : public DatabaseTask
{
public:
DatabaseCloseTask(Database*);
private:
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
};
class DatabaseTransactionTask : public DatabaseTask
{
public:
DatabaseTransactionTask(PassRefPtr<SQLTransaction>);
SQLTransaction* transaction() const { return m_transaction.get(); }
virtual ~DatabaseTransactionTask();
private:
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
RefPtr<SQLTransaction> m_transaction;
};
class DatabaseTableNamesTask : public DatabaseTask
{
public:
DatabaseTableNamesTask(Database*);
Vector<String>& tableNames() { return m_tableNames; }
private:
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
Vector<String> m_tableNames;
};
} // namespace WebCore
#endif // DatabaseTask_h
|
