1 /* 2 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef DatabaseTask_h 29 #define DatabaseTask_h 30 31 #if ENABLE(DATABASE) 32 #include "ExceptionCode.h" 33 #include "PlatformString.h" 34 #include <wtf/OwnPtr.h> 35 #include <wtf/PassRefPtr.h> 36 #include <wtf/Threading.h> 37 #include <wtf/Vector.h> 38 39 namespace WebCore { 40 41 class Database; 42 class DatabaseThread; 43 class SQLValue; 44 class SQLCallback; 45 class SQLTransaction; 46 class VersionChangeCallback; 47 48 class DatabaseTask : public ThreadSafeShared<DatabaseTask> { 49 friend class Database; 50 public: 51 virtual ~DatabaseTask(); 52 53 void performTask(); 54 database()55 Database* database() const { return m_database; } isComplete()56 bool isComplete() const { return m_complete; } 57 58 protected: 59 DatabaseTask(Database*); 60 61 private: 62 virtual void doPerformTask() = 0; 63 #ifndef NDEBUG 64 virtual const char* debugTaskName() const = 0; 65 #endif 66 67 void lockForSynchronousScheduling(); 68 void waitForSynchronousCompletion(); 69 70 Database* m_database; 71 72 bool m_complete; 73 74 OwnPtr<Mutex> m_synchronousMutex; 75 OwnPtr<ThreadCondition> m_synchronousCondition; 76 }; 77 78 class DatabaseOpenTask : public DatabaseTask { 79 public: create(Database * db)80 static PassRefPtr<DatabaseOpenTask> create(Database* db) { return adoptRef(new DatabaseOpenTask(db)); } 81 exceptionCode()82 ExceptionCode exceptionCode() const { return m_code; } openSuccessful()83 bool openSuccessful() const { return m_success; } 84 85 private: 86 DatabaseOpenTask(Database*); 87 88 virtual void doPerformTask(); 89 #ifndef NDEBUG 90 virtual const char* debugTaskName() const; 91 #endif 92 93 ExceptionCode m_code; 94 bool m_success; 95 }; 96 97 class DatabaseCloseTask : public DatabaseTask { 98 public: create(Database * db)99 static PassRefPtr<DatabaseCloseTask> create(Database* db) { return adoptRef(new DatabaseCloseTask(db)); } 100 101 private: 102 DatabaseCloseTask(Database*); 103 104 virtual void doPerformTask(); 105 #ifndef NDEBUG 106 virtual const char* debugTaskName() const; 107 #endif 108 }; 109 110 class DatabaseTransactionTask : public DatabaseTask { 111 public: create(PassRefPtr<SQLTransaction> transaction)112 static PassRefPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransaction> transaction) { return adoptRef(new DatabaseTransactionTask(transaction)); } 113 transaction()114 SQLTransaction* transaction() const { return m_transaction.get(); } 115 116 virtual ~DatabaseTransactionTask(); 117 private: 118 DatabaseTransactionTask(PassRefPtr<SQLTransaction>); 119 120 virtual void doPerformTask(); 121 #ifndef NDEBUG 122 virtual const char* debugTaskName() const; 123 #endif 124 125 RefPtr<SQLTransaction> m_transaction; 126 }; 127 128 class DatabaseTableNamesTask : public DatabaseTask { 129 public: create(Database * db)130 static PassRefPtr<DatabaseTableNamesTask> create(Database* db) { return adoptRef(new DatabaseTableNamesTask(db)); } 131 tableNames()132 Vector<String>& tableNames() { return m_tableNames; } 133 134 private: 135 DatabaseTableNamesTask(Database*); 136 137 virtual void doPerformTask(); 138 #ifndef NDEBUG 139 virtual const char* debugTaskName() const; 140 #endif 141 142 Vector<String> m_tableNames; 143 }; 144 145 } // namespace WebCore 146 147 #endif // ENABLE(DATABASE) 148 #endif // DatabaseTask_h 149