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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 #include "third_party/WebKit/public/platform/WebIDBTypes.h" |
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63 } | 63 } |
64 #endif | 64 #endif |
65 | 65 |
66 std::vector<const IndexedDBTransaction*> | 66 std::vector<const IndexedDBTransaction*> |
67 IndexedDBTransactionCoordinator::GetTransactions() const { | 67 IndexedDBTransactionCoordinator::GetTransactions() const { |
68 std::vector<const IndexedDBTransaction*> result; | 68 std::vector<const IndexedDBTransaction*> result; |
69 | 69 |
70 for (TransactionSet::const_iterator it = started_transactions_.begin(); | 70 for (TransactionSet::const_iterator it = started_transactions_.begin(); |
71 it != started_transactions_.end(); | 71 it != started_transactions_.end(); |
72 ++it) { | 72 ++it) { |
73 result.push_back(*it); | 73 result.push_back(it->get()); |
74 } | 74 } |
75 for (TransactionSet::const_iterator it = queued_transactions_.begin(); | 75 for (TransactionSet::const_iterator it = queued_transactions_.begin(); |
76 it != queued_transactions_.end(); | 76 it != queued_transactions_.end(); |
77 ++it) { | 77 ++it) { |
78 result.push_back(*it); | 78 result.push_back(it->get()); |
79 } | 79 } |
80 | 80 |
81 return result; | 81 return result; |
82 } | 82 } |
83 | 83 |
84 void IndexedDBTransactionCoordinator::ProcessQueuedTransactions() { | 84 void IndexedDBTransactionCoordinator::ProcessQueuedTransactions() { |
85 if (queued_transactions_.empty()) | 85 if (queued_transactions_.empty()) |
86 return; | 86 return; |
87 | 87 |
88 DCHECK(!IsRunningVersionChangeTransaction()); | 88 DCHECK(!IsRunningVersionChangeTransaction()); |
89 | 89 |
90 // The locked_scope set accumulates the ids of object stores in the scope of | 90 // The locked_scope set accumulates the ids of object stores in the scope of |
91 // running read/write transactions. Other read-write transactions with | 91 // running read/write transactions. Other read-write transactions with |
92 // 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, |
93 // taking a snapshot of the database, which does not include uncommitted | 93 // taking a snapshot of the database, which does not include uncommitted |
94 // data. ("Version change" transactions are exclusive, but handled by the | 94 // data. ("Version change" transactions are exclusive, but handled by the |
95 // connection sequencing in IndexedDBDatabase.) | 95 // connection sequencing in IndexedDBDatabase.) |
96 std::set<int64> locked_scope; | 96 std::set<int64> locked_scope; |
97 for (TransactionSet::const_iterator it = started_transactions_.begin(); | 97 for (TransactionSet::const_iterator it = started_transactions_.begin(); |
98 it != started_transactions_.end(); | 98 it != started_transactions_.end(); |
99 ++it) { | 99 ++it) { |
100 IndexedDBTransaction* transaction = *it; | 100 IndexedDBTransaction* transaction = it->get(); |
101 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { | 101 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { |
102 // Started read/write transactions have exclusive access to the object | 102 // Started read/write transactions have exclusive access to the object |
103 // stores within their scopes. | 103 // stores within their scopes. |
104 locked_scope.insert(transaction->scope().begin(), | 104 locked_scope.insert(transaction->scope().begin(), |
105 transaction->scope().end()); | 105 transaction->scope().end()); |
106 } | 106 } |
107 } | 107 } |
108 | 108 |
109 TransactionSet::const_iterator it = queued_transactions_.begin(); | 109 TransactionSet::const_iterator it = queued_transactions_.begin(); |
110 while (it != queued_transactions_.end()) { | 110 while (it != queued_transactions_.end()) { |
111 scoped_refptr<IndexedDBTransaction> transaction = *it; | 111 scoped_refptr<IndexedDBTransaction> transaction = *it; |
112 ++it; | 112 ++it; |
113 if (CanStartTransaction(transaction, locked_scope)) { | 113 if (CanStartTransaction(transaction.get(), locked_scope)) { |
114 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); | 114 DCHECK_EQ(IndexedDBTransaction::CREATED, transaction->state()); |
115 queued_transactions_.erase(transaction); | 115 queued_transactions_.erase(transaction); |
116 started_transactions_.insert(transaction); | 116 started_transactions_.insert(transaction); |
117 transaction->Start(); | 117 transaction->Start(); |
118 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); | 118 DCHECK_EQ(IndexedDBTransaction::STARTED, transaction->state()); |
119 } | 119 } |
120 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { | 120 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { |
121 // Either the transaction started, so it has exclusive access to the | 121 // Either the transaction started, so it has exclusive access to the |
122 // 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 |
123 // 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. |
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158 return true; | 158 return true; |
159 | 159 |
160 case blink::WebIDBTransactionModeReadWrite: | 160 case blink::WebIDBTransactionModeReadWrite: |
161 return !DoSetsIntersect(transaction->scope(), locked_scope); | 161 return !DoSetsIntersect(transaction->scope(), locked_scope); |
162 } | 162 } |
163 NOTREACHED(); | 163 NOTREACHED(); |
164 return false; | 164 return false; |
165 } | 165 } |
166 | 166 |
167 } // namespace content | 167 } // namespace content |
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