#ifndef DatabaseTask_h
#define DatabaseTask_h
#if ENABLE(DATABASE)
#include "Database.h"
#include "ExceptionCode.h"
#include "PlatformString.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
#include <wtf/Vector.h>
namespace WebCore {
class DatabaseTask;
class DatabaseThread;
class SQLValue;
class SQLCallback;
class SQLTransaction;
class VersionChangeCallback;
class DatabaseTaskSynchronizer : public Noncopyable {
public:
DatabaseTaskSynchronizer();
void waitForTaskCompletion();
void taskCompleted();
private:
bool m_taskCompleted;
Mutex m_synchronousMutex;
ThreadCondition m_synchronousCondition;
};
class DatabaseTask : public Noncopyable {
friend class Database;
public:
virtual ~DatabaseTask();
virtual bool shouldPerformWhilePaused() const = 0;
void performTask();
Database* database() const { return m_database; }
protected:
DatabaseTask(Database*, DatabaseTaskSynchronizer*);
private:
virtual void doPerformTask() = 0;
Database* m_database;
DatabaseTaskSynchronizer* m_synchronizer;
#ifndef NDEBUG
virtual const char* debugTaskName() const = 0;
bool m_complete;
#endif
};
class DatabaseOpenTask : public DatabaseTask {
public:
static PassOwnPtr<DatabaseOpenTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer, ExceptionCode& code, bool& success)
{
return new DatabaseOpenTask(db, synchronizer, code, success);
}
virtual bool shouldPerformWhilePaused() const { return true; }
private:
DatabaseOpenTask(Database*, DatabaseTaskSynchronizer*, ExceptionCode&, bool& success);
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
ExceptionCode& m_code;
bool& m_success;
};
class DatabaseCloseTask : public DatabaseTask {
public:
static PassOwnPtr<DatabaseCloseTask> create(Database* db, Database::ClosePolicy closePolicy, DatabaseTaskSynchronizer* synchronizer)
{
return new DatabaseCloseTask(db, closePolicy, synchronizer);
}
virtual bool shouldPerformWhilePaused() const { return true; }
private:
DatabaseCloseTask(Database*, Database::ClosePolicy, DatabaseTaskSynchronizer*);
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
Database::ClosePolicy m_closePolicy;
};
class DatabaseTransactionTask : public DatabaseTask {
public:
static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransaction> transaction)
{
return new DatabaseTransactionTask(transaction);
}
virtual bool shouldPerformWhilePaused() const;
SQLTransaction* transaction() const { return m_transaction.get(); }
virtual ~DatabaseTransactionTask();
private:
DatabaseTransactionTask(PassRefPtr<SQLTransaction>);
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
RefPtr<SQLTransaction> m_transaction;
};
class DatabaseTableNamesTask : public DatabaseTask {
public:
static PassOwnPtr<DatabaseTableNamesTask> create(Database* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
{
return new DatabaseTableNamesTask(db, synchronizer, names);
}
virtual bool shouldPerformWhilePaused() const { return true; }
private:
DatabaseTableNamesTask(Database*, DatabaseTaskSynchronizer*, Vector<String>& names);
virtual void doPerformTask();
#ifndef NDEBUG
virtual const char* debugTaskName() const;
#endif
Vector<String>& m_tableNames;
};
}
#endif // ENABLE(DATABASE)
#endif // DatabaseTask_h