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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ | 5 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ |
6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ | 6 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ |
7 | 7 |
8 #include <queue> | 8 #include <queue> |
9 #include <set> | 9 #include <set> |
10 #include <stack> | 10 #include <stack> |
11 #include <vector> | 11 #include <vector> |
12 | 12 |
13 #include "base/basictypes.h" | 13 #include "base/basictypes.h" |
14 #include "base/memory/ref_counted.h" | 14 #include "base/memory/ref_counted.h" |
15 #include "base/memory/scoped_ptr.h" | 15 #include "base/memory/scoped_ptr.h" |
16 #include "base/timer.h" | 16 #include "base/timer.h" |
17 #include "content/browser/indexed_db/indexed_db_backing_store.h" | 17 #include "content/browser/indexed_db/indexed_db_backing_store.h" |
18 #include "content/browser/indexed_db/indexed_db_database.h" | 18 #include "content/browser/indexed_db/indexed_db_database.h" |
19 #include "content/browser/indexed_db/indexed_db_database_error.h" | 19 #include "content/browser/indexed_db/indexed_db_database_error.h" |
20 | 20 |
21 namespace content { | 21 namespace content { |
22 | 22 |
23 class IndexedDBDatabaseImpl; | 23 class IndexedDBDatabase; |
24 class IndexedDBCursorImpl; | 24 class IndexedDBCursor; |
25 class IndexedDBDatabaseCallbacksWrapper; | 25 class IndexedDBDatabaseCallbacksWrapper; |
26 | 26 |
27 class IndexedDBTransaction : public base::RefCounted<IndexedDBTransaction> { | 27 class IndexedDBTransaction : public base::RefCounted<IndexedDBTransaction> { |
28 public: | 28 public: |
29 static scoped_refptr<IndexedDBTransaction> Create( | 29 static scoped_refptr<IndexedDBTransaction> Create( |
30 int64 transaction_id, | 30 int64 transaction_id, |
31 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks, | 31 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks, |
32 const std::vector<int64>& scope, | 32 const std::vector<int64>& scope, |
33 indexed_db::TransactionMode, | 33 indexed_db::TransactionMode, |
34 IndexedDBDatabaseImpl* db); | 34 IndexedDBDatabase* db); |
35 | 35 |
36 virtual void Abort(); | 36 virtual void Abort(); |
37 void Commit(); | 37 void Commit(); |
38 | 38 |
39 class Operation { | 39 class Operation { |
40 public: | 40 public: |
41 Operation() {} | 41 Operation() {} |
42 virtual ~Operation() {} | 42 virtual ~Operation() {} |
43 virtual void Perform(IndexedDBTransaction* transaction) = 0; | 43 virtual void Perform(IndexedDBTransaction* transaction) = 0; |
44 }; | 44 }; |
45 | 45 |
46 void Abort(const IndexedDBDatabaseError& error); | 46 void Abort(const IndexedDBDatabaseError& error); |
47 void Run(); | 47 void Run(); |
48 indexed_db::TransactionMode mode() const { return mode_; } | 48 indexed_db::TransactionMode mode() const { return mode_; } |
49 const std::set<int64>& scope() const { return object_store_ids_; } | 49 const std::set<int64>& scope() const { return object_store_ids_; } |
50 void ScheduleTask(Operation* task, Operation* abort_task = NULL) { | 50 void ScheduleTask(Operation* task, Operation* abort_task = NULL) { |
51 ScheduleTask(IndexedDBDatabase::NORMAL_TASK, task, abort_task); | 51 ScheduleTask(IndexedDBDatabase::NORMAL_TASK, task, abort_task); |
52 } | 52 } |
53 void ScheduleTask(IndexedDBDatabase::TaskType, | 53 void ScheduleTask(IndexedDBDatabase::TaskType, |
54 Operation* task, | 54 Operation* task, |
55 Operation* abort_task = NULL); | 55 Operation* abort_task = NULL); |
56 void RegisterOpenCursor(IndexedDBCursorImpl* cursor); | 56 void RegisterOpenCursor(IndexedDBCursor* cursor); |
57 void UnregisterOpenCursor(IndexedDBCursorImpl* cursor); | 57 void UnregisterOpenCursor(IndexedDBCursor* cursor); |
58 void AddPreemptiveEvent() { pending_preemptive_events_++; } | 58 void AddPreemptiveEvent() { pending_preemptive_events_++; } |
59 void DidCompletePreemptiveEvent() { | 59 void DidCompletePreemptiveEvent() { |
60 pending_preemptive_events_--; | 60 pending_preemptive_events_--; |
61 DCHECK_GE(pending_preemptive_events_, 0); | 61 DCHECK_GE(pending_preemptive_events_, 0); |
62 } | 62 } |
63 IndexedDBBackingStore::Transaction* BackingStoreTransaction() { | 63 IndexedDBBackingStore::Transaction* BackingStoreTransaction() { |
64 return &transaction_; | 64 return &transaction_; |
65 } | 65 } |
66 int64 id() const { return id_; } | 66 int64 id() const { return id_; } |
67 | 67 |
68 IndexedDBDatabaseImpl* database() const { return database_.get(); } | 68 IndexedDBDatabase* database() const { return database_.get(); } |
69 IndexedDBDatabaseCallbacksWrapper* connection() const { | 69 IndexedDBDatabaseCallbacksWrapper* connection() const { |
70 return callbacks_.get(); | 70 return callbacks_.get(); |
71 } | 71 } |
72 | 72 |
73 protected: | 73 protected: |
74 virtual ~IndexedDBTransaction(); | 74 virtual ~IndexedDBTransaction(); |
75 friend class base::RefCounted<IndexedDBTransaction>; | 75 friend class base::RefCounted<IndexedDBTransaction>; |
76 | 76 |
77 private: | 77 private: |
78 IndexedDBTransaction( | 78 IndexedDBTransaction( |
79 int64 id, | 79 int64 id, |
80 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks, | 80 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks, |
81 const std::set<int64>& object_store_ids, | 81 const std::set<int64>& object_store_ids, |
82 indexed_db::TransactionMode, | 82 indexed_db::TransactionMode, |
83 IndexedDBDatabaseImpl* db); | 83 IndexedDBDatabase* db); |
84 | 84 |
85 enum State { | 85 enum State { |
86 UNUSED, // Created, but no tasks yet. | 86 UNUSED, // Created, but no tasks yet. |
87 START_PENDING, // Enqueued tasks, but backing store transaction not yet | 87 START_PENDING, // Enqueued tasks, but backing store transaction not yet |
88 // started. | 88 // started. |
89 RUNNING, // Backing store transaction started but not yet finished. | 89 RUNNING, // Backing store transaction started but not yet finished. |
90 FINISHED, // Either aborted or committed. | 90 FINISHED, // Either aborted or committed. |
91 }; | 91 }; |
92 | 92 |
93 void Start(); | 93 void Start(); |
94 | 94 |
95 bool IsTaskQueueEmpty() const; | 95 bool IsTaskQueueEmpty() const; |
96 bool HasPendingTasks() const; | 96 bool HasPendingTasks() const; |
97 | 97 |
98 void TaskTimerFired(); | 98 void TaskTimerFired(); |
99 void CloseOpenCursors(); | 99 void CloseOpenCursors(); |
100 | 100 |
101 const int64 id_; | 101 const int64 id_; |
102 const std::set<int64> object_store_ids_; | 102 const std::set<int64> object_store_ids_; |
103 const indexed_db::TransactionMode mode_; | 103 const indexed_db::TransactionMode mode_; |
104 | 104 |
105 State state_; | 105 State state_; |
106 bool commit_pending_; | 106 bool commit_pending_; |
107 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks_; | 107 scoped_refptr<IndexedDBDatabaseCallbacksWrapper> callbacks_; |
108 scoped_refptr<IndexedDBDatabaseImpl> database_; | 108 scoped_refptr<IndexedDBDatabase> database_; |
109 | 109 |
110 class TaskQueue { | 110 class TaskQueue { |
111 public: | 111 public: |
112 TaskQueue(); | 112 TaskQueue(); |
113 ~TaskQueue(); | 113 ~TaskQueue(); |
114 bool empty() const { return queue_.empty(); } | 114 bool empty() const { return queue_.empty(); } |
115 void push(Operation* task) { queue_.push(task); } | 115 void push(Operation* task) { queue_.push(task); } |
116 scoped_ptr<Operation> pop(); | 116 scoped_ptr<Operation> pop(); |
117 void clear(); | 117 void clear(); |
118 | 118 |
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135 | 135 |
136 TaskQueue task_queue_; | 136 TaskQueue task_queue_; |
137 TaskQueue preemptive_task_queue_; | 137 TaskQueue preemptive_task_queue_; |
138 TaskStack abort_task_stack_; | 138 TaskStack abort_task_stack_; |
139 | 139 |
140 IndexedDBBackingStore::Transaction transaction_; | 140 IndexedDBBackingStore::Transaction transaction_; |
141 | 141 |
142 base::OneShotTimer<IndexedDBTransaction> task_timer_; | 142 base::OneShotTimer<IndexedDBTransaction> task_timer_; |
143 int pending_preemptive_events_; | 143 int pending_preemptive_events_; |
144 | 144 |
145 std::set<IndexedDBCursorImpl*> open_cursors_; | 145 std::set<IndexedDBCursor*> open_cursors_; |
146 }; | 146 }; |
147 | 147 |
148 } // namespace content | 148 } // namespace content |
149 | 149 |
150 #endif // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ | 150 #endif // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_TRANSACTION_H_ |
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