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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 #include "content/browser/indexed_db/indexed_db_transaction_coordinator.h" | 5 #include "content/browser/indexed_db/indexed_db_transaction_coordinator.h" |
6 | 6 |
7 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
8 #include "base/logging.h" | 8 #include "base/logging.h" |
9 #include "content/browser/indexed_db/indexed_db_transaction.h" | 9 #include "content/browser/indexed_db/indexed_db_transaction.h" |
| 10 #include "third_party/WebKit/public/platform/WebIDBTypes.h" |
10 | 11 |
11 namespace content { | 12 namespace content { |
12 | 13 |
13 IndexedDBTransactionCoordinator::IndexedDBTransactionCoordinator() {} | 14 IndexedDBTransactionCoordinator::IndexedDBTransactionCoordinator() {} |
14 | 15 |
15 IndexedDBTransactionCoordinator::~IndexedDBTransactionCoordinator() { | 16 IndexedDBTransactionCoordinator::~IndexedDBTransactionCoordinator() { |
16 DCHECK(!queued_transactions_.size()); | 17 DCHECK(!queued_transactions_.size()); |
17 DCHECK(!started_transactions_.size()); | 18 DCHECK(!started_transactions_.size()); |
18 } | 19 } |
19 | 20 |
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37 started_transactions_.erase(transaction); | 38 started_transactions_.erase(transaction); |
38 } | 39 } |
39 | 40 |
40 ProcessQueuedTransactions(); | 41 ProcessQueuedTransactions(); |
41 } | 42 } |
42 | 43 |
43 bool IndexedDBTransactionCoordinator::IsRunningVersionChangeTransaction() | 44 bool IndexedDBTransactionCoordinator::IsRunningVersionChangeTransaction() |
44 const { | 45 const { |
45 return !started_transactions_.empty() && | 46 return !started_transactions_.empty() && |
46 (*started_transactions_.begin())->mode() == | 47 (*started_transactions_.begin())->mode() == |
47 indexed_db::TRANSACTION_VERSION_CHANGE; | 48 blink::WebIDBTransactionModeVersionChange; |
48 } | 49 } |
49 | 50 |
50 #ifndef NDEBUG | 51 #ifndef NDEBUG |
51 // Verifies internal consistency while returning whether anything is found. | 52 // Verifies internal consistency while returning whether anything is found. |
52 bool IndexedDBTransactionCoordinator::IsActive( | 53 bool IndexedDBTransactionCoordinator::IsActive( |
53 IndexedDBTransaction* transaction) { | 54 IndexedDBTransaction* transaction) { |
54 bool found = false; | 55 bool found = false; |
55 if (queued_transactions_.count(transaction)) | 56 if (queued_transactions_.count(transaction)) |
56 found = true; | 57 found = true; |
57 if (started_transactions_.count(transaction)) { | 58 if (started_transactions_.count(transaction)) { |
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90 // running read/write transactions. Other read-write transactions with | 91 // running read/write transactions. Other read-write transactions with |
91 // stores in this set may not be started. Read-only transactions may start, | 92 // stores in this set may not be started. Read-only transactions may start, |
92 // taking a snapshot of the database, which does not include uncommitted | 93 // taking a snapshot of the database, which does not include uncommitted |
93 // data. ("Version change" transactions are exclusive, but handled by the | 94 // data. ("Version change" transactions are exclusive, but handled by the |
94 // connection sequencing in IndexedDBDatabase.) | 95 // connection sequencing in IndexedDBDatabase.) |
95 std::set<int64> locked_scope; | 96 std::set<int64> locked_scope; |
96 for (TransactionSet::const_iterator it = started_transactions_.begin(); | 97 for (TransactionSet::const_iterator it = started_transactions_.begin(); |
97 it != started_transactions_.end(); | 98 it != started_transactions_.end(); |
98 ++it) { | 99 ++it) { |
99 IndexedDBTransaction* transaction = *it; | 100 IndexedDBTransaction* transaction = *it; |
100 if (transaction->mode() == indexed_db::TRANSACTION_READ_WRITE) { | 101 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { |
101 // Started read/write transactions have exclusive access to the object | 102 // Started read/write transactions have exclusive access to the object |
102 // stores within their scopes. | 103 // stores within their scopes. |
103 locked_scope.insert(transaction->scope().begin(), | 104 locked_scope.insert(transaction->scope().begin(), |
104 transaction->scope().end()); | 105 transaction->scope().end()); |
105 } | 106 } |
106 } | 107 } |
107 | 108 |
108 TransactionSet::const_iterator it = queued_transactions_.begin(); | 109 TransactionSet::const_iterator it = queued_transactions_.begin(); |
109 while (it != queued_transactions_.end()) { | 110 while (it != queued_transactions_.end()) { |
110 scoped_refptr<IndexedDBTransaction> transaction = *it; | 111 scoped_refptr<IndexedDBTransaction> transaction = *it; |
111 ++it; | 112 ++it; |
112 if (CanStartTransaction(transaction, locked_scope)) { | 113 if (CanStartTransaction(transaction, locked_scope)) { |
113 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); | 114 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); |
114 queued_transactions_.erase(transaction); | 115 queued_transactions_.erase(transaction); |
115 started_transactions_.insert(transaction); | 116 started_transactions_.insert(transaction); |
116 transaction->Start(); | 117 transaction->Start(); |
117 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); | 118 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); |
118 } | 119 } |
119 if (transaction->mode() == indexed_db::TRANSACTION_READ_WRITE) { | 120 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { |
120 // Either the transaction started, so it has exclusive access to the | 121 // Either the transaction started, so it has exclusive access to the |
121 // stores in its scope, or per the spec the transaction which was | 122 // stores in its scope, or per the spec the transaction which was |
122 // created first must get access first, so the stores are also locked. | 123 // created first must get access first, so the stores are also locked. |
123 locked_scope.insert(transaction->scope().begin(), | 124 locked_scope.insert(transaction->scope().begin(), |
124 transaction->scope().end()); | 125 transaction->scope().end()); |
125 } | 126 } |
126 } | 127 } |
127 } | 128 } |
128 | 129 |
129 template<typename T> | 130 template<typename T> |
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140 return true; | 141 return true; |
141 } | 142 } |
142 return false; | 143 return false; |
143 } | 144 } |
144 | 145 |
145 bool IndexedDBTransactionCoordinator::CanStartTransaction( | 146 bool IndexedDBTransactionCoordinator::CanStartTransaction( |
146 IndexedDBTransaction* const transaction, | 147 IndexedDBTransaction* const transaction, |
147 const std::set<int64>& locked_scope) const { | 148 const std::set<int64>& locked_scope) const { |
148 DCHECK(queued_transactions_.count(transaction)); | 149 DCHECK(queued_transactions_.count(transaction)); |
149 switch (transaction->mode()) { | 150 switch (transaction->mode()) { |
150 case indexed_db::TRANSACTION_VERSION_CHANGE: | 151 case blink::WebIDBTransactionModeVersionChange: |
151 DCHECK_EQ(1u, queued_transactions_.size()); | 152 DCHECK_EQ(1u, queued_transactions_.size()); |
152 DCHECK(started_transactions_.empty()); | 153 DCHECK(started_transactions_.empty()); |
153 DCHECK(locked_scope.empty()); | 154 DCHECK(locked_scope.empty()); |
154 return true; | 155 return true; |
155 | 156 |
156 case indexed_db::TRANSACTION_READ_ONLY: | 157 case blink::WebIDBTransactionModeReadOnly: |
157 return true; | 158 return true; |
158 | 159 |
159 case indexed_db::TRANSACTION_READ_WRITE: | 160 case blink::WebIDBTransactionModeReadWrite: |
160 return !DoSetsIntersect(transaction->scope(), locked_scope); | 161 return !DoSetsIntersect(transaction->scope(), locked_scope); |
161 } | 162 } |
162 NOTREACHED(); | 163 NOTREACHED(); |
163 return false; | 164 return false; |
164 } | 165 } |
165 | 166 |
166 } // namespace content | 167 } // namespace content |
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