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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/logging.h" | 7 #include "base/logging.h" |
| 8 #include "content/browser/indexed_db/indexed_db_transaction.h" | 8 #include "content/browser/indexed_db/indexed_db_transaction.h" |
| 9 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h" | 9 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBTypes.h" |
| 10 | 10 |
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| 99 | 99 |
| 100 DCHECK(!IsRunningVersionChangeTransaction()); | 100 DCHECK(!IsRunningVersionChangeTransaction()); |
| 101 | 101 |
| 102 // The locked_scope set accumulates the ids of object stores in the scope of | 102 // The locked_scope set accumulates the ids of object stores in the scope of |
| 103 // running read/write transactions. Other read-write transactions with | 103 // running read/write transactions. Other read-write transactions with |
| 104 // stores in this set may not be started. Read-only transactions may start, | 104 // stores in this set may not be started. Read-only transactions may start, |
| 105 // taking a snapshot of the database, which does not include uncommitted | 105 // taking a snapshot of the database, which does not include uncommitted |
| 106 // data. ("Version change" transactions are exclusive, but handled by the | 106 // data. ("Version change" transactions are exclusive, but handled by the |
| 107 // connection sequencing in IndexedDBDatabase.) | 107 // connection sequencing in IndexedDBDatabase.) |
| 108 std::set<int64_t> locked_scope; | 108 std::set<int64_t> locked_scope; |
| 109 for (const auto& transaction : started_transactions_) { | 109 for (auto* transaction : started_transactions_) { |
| 110 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { | 110 if (transaction->mode() == blink::WebIDBTransactionModeReadWrite) { |
| 111 // Started read/write transactions have exclusive access to the object | 111 // Started read/write transactions have exclusive access to the object |
| 112 // stores within their scopes. | 112 // stores within their scopes. |
| 113 locked_scope.insert(transaction->scope().begin(), | 113 locked_scope.insert(transaction->scope().begin(), |
| 114 transaction->scope().end()); | 114 transaction->scope().end()); |
| 115 } | 115 } |
| 116 } | 116 } |
| 117 | 117 |
| 118 auto it = queued_transactions_.begin(); | 118 auto it = queued_transactions_.begin(); |
| 119 while (it != queued_transactions_.end()) { | 119 while (it != queued_transactions_.end()) { |
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| 168 | 168 |
| 169 case blink::WebIDBTransactionModeReadOnly: | 169 case blink::WebIDBTransactionModeReadOnly: |
| 170 case blink::WebIDBTransactionModeReadWrite: | 170 case blink::WebIDBTransactionModeReadWrite: |
| 171 return !DoSetsIntersect(transaction->scope(), locked_scope); | 171 return !DoSetsIntersect(transaction->scope(), locked_scope); |
| 172 } | 172 } |
| 173 NOTREACHED(); | 173 NOTREACHED(); |
| 174 return false; | 174 return false; |
| 175 } | 175 } |
| 176 | 176 |
| 177 } // namespace content | 177 } // namespace content |
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