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
|
/*
* Copyright (C) 2010 Google 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.
*
* 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 IDBTransactionBackendImpl_h
#define IDBTransactionBackendImpl_h
#if ENABLE(INDEXED_DATABASE)
#include "IDBBackingStore.h"
#include "IDBDatabaseError.h"
#include "IDBTransactionBackendInterface.h"
#include "IDBTransactionCallbacks.h"
#include "ScriptExecutionContext.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/HashSet.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class IDBDatabaseBackendImpl;
class IDBTransactionBackendImpl : public IDBTransactionBackendInterface {
public:
static PassRefPtr<IDBTransactionBackendImpl> create(int64_t transactionId, const Vector<int64_t>&, unsigned short mode, IDBDatabaseBackendImpl*);
static IDBTransactionBackendImpl* from(IDBTransactionBackendInterface* interface)
{
return static_cast<IDBTransactionBackendImpl*>(interface);
}
virtual ~IDBTransactionBackendImpl();
// IDBTransactionBackendInterface
virtual PassRefPtr<IDBObjectStoreBackendInterface> objectStore(int64_t, ExceptionCode&);
virtual void abort();
virtual void setCallbacks(IDBTransactionCallbacks* callbacks) { m_callbacks = callbacks; }
void abort(PassRefPtr<IDBDatabaseError>);
void run();
unsigned short mode() const { return m_mode; }
bool isFinished() const { return m_state == Finished; }
bool scheduleTask(PassOwnPtr<ScriptExecutionContext::Task> task, PassOwnPtr<ScriptExecutionContext::Task> abortTask = nullptr) { return scheduleTask(NormalTask, task, abortTask); }
bool scheduleTask(TaskType, PassOwnPtr<ScriptExecutionContext::Task>, PassOwnPtr<ScriptExecutionContext::Task> abortTask = nullptr);
void registerOpenCursor(IDBCursorBackendImpl*);
void unregisterOpenCursor(IDBCursorBackendImpl*);
void addPreemptiveEvent() { m_pendingPreemptiveEvents++; }
void didCompletePreemptiveEvent() { m_pendingPreemptiveEvents--; ASSERT(m_pendingPreemptiveEvents >= 0); }
IDBBackingStore::Transaction* backingStoreTransaction() { return &m_transaction; }
int64_t id() const { return m_id; }
private:
IDBTransactionBackendImpl(int64_t id, const Vector<int64_t>& objectStoreIds, unsigned short mode, IDBDatabaseBackendImpl*);
enum State {
Unused, // Created, but no tasks yet.
StartPending, // Enqueued tasks, but backing store transaction not yet started.
Running, // Backing store transaction started but not yet finished.
Finished, // Either aborted or committed.
};
void start();
void commit();
bool isTaskQueueEmpty() const;
bool hasPendingTasks() const;
void taskTimerFired(Timer<IDBTransactionBackendImpl>*);
void closeOpenCursors();
const int64_t m_id;
const Vector<int64_t> m_objectStoreIds;
const unsigned short m_mode;
State m_state;
bool m_commitPending;
RefPtr<IDBTransactionCallbacks> m_callbacks;
RefPtr<IDBDatabaseBackendImpl> m_database;
typedef Deque<OwnPtr<ScriptExecutionContext::Task> > TaskQueue;
TaskQueue m_taskQueue;
TaskQueue m_preemptiveTaskQueue;
TaskQueue m_abortTaskQueue;
IDBBackingStore::Transaction m_transaction;
// FIXME: delete the timer once we have threads instead.
Timer<IDBTransactionBackendImpl> m_taskTimer;
int m_pendingPreemptiveEvents;
HashSet<IDBCursorBackendImpl*> m_openCursors;
};
} // namespace WebCore
#endif // ENABLE(INDEXED_DATABASE)
#endif // IDBTransactionBackendImpl_h
|
