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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" |
jsbell
2014/06/09 16:38:27
need to include WebIDBTypes.h
Pritam Nikam
2014/06/11 14:05:16
Done.
| |
10 | 10 |
11 namespace content { | 11 namespace content { |
12 | 12 |
13 IndexedDBTransactionCoordinator::IndexedDBTransactionCoordinator() {} | 13 IndexedDBTransactionCoordinator::IndexedDBTransactionCoordinator() {} |
14 | 14 |
15 IndexedDBTransactionCoordinator::~IndexedDBTransactionCoordinator() { | 15 IndexedDBTransactionCoordinator::~IndexedDBTransactionCoordinator() { |
16 DCHECK(!queued_transactions_.size()); | 16 DCHECK(!queued_transactions_.size()); |
17 DCHECK(!started_transactions_.size()); | 17 DCHECK(!started_transactions_.size()); |
18 } | 18 } |
19 | 19 |
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37 started_transactions_.erase(transaction); | 37 started_transactions_.erase(transaction); |
38 } | 38 } |
39 | 39 |
40 ProcessQueuedTransactions(); | 40 ProcessQueuedTransactions(); |
41 } | 41 } |
42 | 42 |
43 bool IndexedDBTransactionCoordinator::IsRunningVersionChangeTransaction() | 43 bool IndexedDBTransactionCoordinator::IsRunningVersionChangeTransaction() |
44 const { | 44 const { |
45 return !started_transactions_.empty() && | 45 return !started_transactions_.empty() && |
46 (*started_transactions_.begin())->mode() == | 46 (*started_transactions_.begin())->mode() == |
47 indexed_db::TRANSACTION_VERSION_CHANGE; | 47 blink::TransactionVersionChange; |
48 } | 48 } |
49 | 49 |
50 #ifndef NDEBUG | 50 #ifndef NDEBUG |
51 // Verifies internal consistency while returning whether anything is found. | 51 // Verifies internal consistency while returning whether anything is found. |
52 bool IndexedDBTransactionCoordinator::IsActive( | 52 bool IndexedDBTransactionCoordinator::IsActive( |
53 IndexedDBTransaction* transaction) { | 53 IndexedDBTransaction* transaction) { |
54 bool found = false; | 54 bool found = false; |
55 if (queued_transactions_.count(transaction)) | 55 if (queued_transactions_.count(transaction)) |
56 found = true; | 56 found = true; |
57 if (started_transactions_.count(transaction)) { | 57 if (started_transactions_.count(transaction)) { |
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90 // running read/write transactions. Other read-write transactions with | 90 // running read/write transactions. Other read-write transactions with |
91 // stores in this set may not be started. Read-only transactions may start, | 91 // 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 | 92 // taking a snapshot of the database, which does not include uncommitted |
93 // data. ("Version change" transactions are exclusive, but handled by the | 93 // data. ("Version change" transactions are exclusive, but handled by the |
94 // connection sequencing in IndexedDBDatabase.) | 94 // connection sequencing in IndexedDBDatabase.) |
95 std::set<int64> locked_scope; | 95 std::set<int64> locked_scope; |
96 for (TransactionSet::const_iterator it = started_transactions_.begin(); | 96 for (TransactionSet::const_iterator it = started_transactions_.begin(); |
97 it != started_transactions_.end(); | 97 it != started_transactions_.end(); |
98 ++it) { | 98 ++it) { |
99 IndexedDBTransaction* transaction = *it; | 99 IndexedDBTransaction* transaction = *it; |
100 if (transaction->mode() == indexed_db::TRANSACTION_READ_WRITE) { | 100 if (transaction->mode() == blink::TransactionReadWrite) { |
101 // Started read/write transactions have exclusive access to the object | 101 // Started read/write transactions have exclusive access to the object |
102 // stores within their scopes. | 102 // stores within their scopes. |
103 locked_scope.insert(transaction->scope().begin(), | 103 locked_scope.insert(transaction->scope().begin(), |
104 transaction->scope().end()); | 104 transaction->scope().end()); |
105 } | 105 } |
106 } | 106 } |
107 | 107 |
108 TransactionSet::const_iterator it = queued_transactions_.begin(); | 108 TransactionSet::const_iterator it = queued_transactions_.begin(); |
109 while (it != queued_transactions_.end()) { | 109 while (it != queued_transactions_.end()) { |
110 scoped_refptr<IndexedDBTransaction> transaction = *it; | 110 scoped_refptr<IndexedDBTransaction> transaction = *it; |
111 ++it; | 111 ++it; |
112 if (CanStartTransaction(transaction, locked_scope)) { | 112 if (CanStartTransaction(transaction, locked_scope)) { |
113 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); | 113 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); |
114 queued_transactions_.erase(transaction); | 114 queued_transactions_.erase(transaction); |
115 started_transactions_.insert(transaction); | 115 started_transactions_.insert(transaction); |
116 transaction->Start(); | 116 transaction->Start(); |
117 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); | 117 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); |
118 } | 118 } |
119 if (transaction->mode() == indexed_db::TRANSACTION_READ_WRITE) { | 119 if (transaction->mode() == blink::TransactionReadWrite) { |
120 // Either the transaction started, so it has exclusive access to the | 120 // Either the transaction started, so it has exclusive access to the |
121 // stores in its scope, or per the spec the transaction which was | 121 // 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. | 122 // created first must get access first, so the stores are also locked. |
123 locked_scope.insert(transaction->scope().begin(), | 123 locked_scope.insert(transaction->scope().begin(), |
124 transaction->scope().end()); | 124 transaction->scope().end()); |
125 } | 125 } |
126 } | 126 } |
127 } | 127 } |
128 | 128 |
129 template<typename T> | 129 template<typename T> |
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140 return true; | 140 return true; |
141 } | 141 } |
142 return false; | 142 return false; |
143 } | 143 } |
144 | 144 |
145 bool IndexedDBTransactionCoordinator::CanStartTransaction( | 145 bool IndexedDBTransactionCoordinator::CanStartTransaction( |
146 IndexedDBTransaction* const transaction, | 146 IndexedDBTransaction* const transaction, |
147 const std::set<int64>& locked_scope) const { | 147 const std::set<int64>& locked_scope) const { |
148 DCHECK(queued_transactions_.count(transaction)); | 148 DCHECK(queued_transactions_.count(transaction)); |
149 switch (transaction->mode()) { | 149 switch (transaction->mode()) { |
150 case indexed_db::TRANSACTION_VERSION_CHANGE: | 150 case blink::TransactionVersionChange: |
151 DCHECK_EQ(1u, queued_transactions_.size()); | 151 DCHECK_EQ(1u, queued_transactions_.size()); |
152 DCHECK(started_transactions_.empty()); | 152 DCHECK(started_transactions_.empty()); |
153 DCHECK(locked_scope.empty()); | 153 DCHECK(locked_scope.empty()); |
154 return true; | 154 return true; |
155 | 155 |
156 case indexed_db::TRANSACTION_READ_ONLY: | 156 case blink::TransactionReadOnly: |
157 return true; | 157 return true; |
158 | 158 |
159 case indexed_db::TRANSACTION_READ_WRITE: | 159 case blink::TransactionReadWrite: |
160 return !DoSetsIntersect(transaction->scope(), locked_scope); | 160 return !DoSetsIntersect(transaction->scope(), locked_scope); |
161 } | 161 } |
162 NOTREACHED(); | 162 NOTREACHED(); |
163 return false; | 163 return false; |
164 } | 164 } |
165 | 165 |
166 } // namespace content | 166 } // namespace content |
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