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28 #ifndef DatabaseTask_h
29 #define DatabaseTask_h
33 #include "ExceptionCode.h"
34 #include "PlatformString.h"
35 #include "SQLTransaction.h"
36 #include <wtf/OwnPtr.h>
37 #include <wtf/PassOwnPtr.h>
38 #include <wtf/PassRefPtr.h>
39 #include <wtf/Threading.h>
40 #include <wtf/Vector.h>
44 // Can be used to wait until DatabaseTask is completed.
45 // Has to be passed into DatabaseTask::create to be associated with the task.
46 class DatabaseTaskSynchronizer {
47 WTF_MAKE_NONCOPYABLE(DatabaseTaskSynchronizer);
49 DatabaseTaskSynchronizer();
51 // Called from main thread to wait until task is completed.
52 void waitForTaskCompletion();
54 // Called by the task.
58 bool hasCheckedForTermination() const { return m_hasCheckedForTermination; }
59 void setHasCheckedForTermination() { m_hasCheckedForTermination = true; }
64 Mutex m_synchronousMutex;
65 ThreadCondition m_synchronousCondition;
67 bool m_hasCheckedForTermination;
72 WTF_MAKE_NONCOPYABLE(DatabaseTask); WTF_MAKE_FAST_ALLOCATED;
74 virtual ~DatabaseTask();
78 Database* database() const { return m_database; }
80 bool hasSynchronizer() const { return m_synchronizer; }
81 bool hasCheckedForTermination() const { return m_synchronizer->hasCheckedForTermination(); }
85 DatabaseTask(Database*, DatabaseTaskSynchronizer*);
88 virtual void doPerformTask() = 0;
91 DatabaseTaskSynchronizer* m_synchronizer;
94 virtual const char* debugTaskName() const = 0;
99 class Database::DatabaseOpenTask : public DatabaseTask {
101 static PassOwnPtr<DatabaseOpenTask> create(Database* db, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, ExceptionCode& code, bool& success)
103 return adoptPtr(new DatabaseOpenTask(db, setVersionInNewDatabase, synchronizer, code, success));
107 DatabaseOpenTask(Database*, bool setVersionInNewDatabase, DatabaseTaskSynchronizer*, ExceptionCode&, bool& success);
109 virtual void doPerformTask();
111 virtual const char* debugTaskName() const;
114 bool m_setVersionInNewDatabase;
115 ExceptionCode& m_code;
119 class Database::DatabaseCloseTask : public DatabaseTask {
121 static PassOwnPtr<DatabaseCloseTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer)
123 return adoptPtr(new DatabaseCloseTask(db, synchronizer));
127 DatabaseCloseTask(Database*, DatabaseTaskSynchronizer*);
129 virtual void doPerformTask();
131 virtual const char* debugTaskName() const;
135 class Database::DatabaseTransactionTask : public DatabaseTask {
137 // Transaction task is never synchronous, so no 'synchronizer' parameter.
138 static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransaction> transaction)
140 return adoptPtr(new DatabaseTransactionTask(transaction));
143 SQLTransaction* transaction() const { return m_transaction.get(); }
146 DatabaseTransactionTask(PassRefPtr<SQLTransaction>);
148 virtual void doPerformTask();
150 virtual const char* debugTaskName() const;
153 RefPtr<SQLTransaction> m_transaction;
156 class Database::DatabaseTableNamesTask : public DatabaseTask {
158 static PassOwnPtr<DatabaseTableNamesTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
160 return adoptPtr(new DatabaseTableNamesTask(db, synchronizer, names));
164 DatabaseTableNamesTask(Database*, DatabaseTaskSynchronizer*, Vector<String>& names);
166 virtual void doPerformTask();
168 virtual const char* debugTaskName() const;
171 Vector<String>& m_tableNames;
174 } // namespace WebCore
176 #endif // ENABLE(DATABASE)
177 #endif // DatabaseTask_h