#ifndef DatabaseTask_h
#define DatabaseTask_h
#if ENABLE(SQL_DATABASE)
#include "DatabaseBackend.h"
#include "DatabaseBasicTypes.h"
#include "DatabaseError.h"
#include "SQLTransactionBackend.h"
#include <wtf/PassRefPtr.h>
#include <wtf/Threading.h>
#include <wtf/Vector.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class DatabaseTaskSynchronizer {
WTF_MAKE_NONCOPYABLE(DatabaseTaskSynchronizer);
public:
DatabaseTaskSynchronizer();
void waitForTaskCompletion();
void taskCompleted();
#ifndef NDEBUG
bool hasCheckedForTermination() const { return m_hasCheckedForTermination; }
void setHasCheckedForTermination() { m_hasCheckedForTermination = true; }
#endif
private:
bool m_taskCompleted;
Mutex m_synchronousMutex;
ThreadCondition m_synchronousCondition;
#ifndef NDEBUG
bool m_hasCheckedForTermination;
#endif
};
class DatabaseTask {
WTF_MAKE_NONCOPYABLE(DatabaseTask); WTF_MAKE_FAST_ALLOCATED;
public:
virtual ~DatabaseTask();
#if PLATFORM(IOS)
virtual bool shouldPerformWhilePaused() const = 0;
#endif
void performTask();
DatabaseBackend* database() const { return m_database; }
#ifndef NDEBUG
bool hasSynchronizer() const { return m_synchronizer; }
bool hasCheckedForTermination() const { return m_synchronizer->hasCheckedForTermination(); }
#endif
protected:
DatabaseTask(DatabaseBackend*, DatabaseTaskSynchronizer*);
private:
virtual void doPerformTask() = 0;
DatabaseBackend* m_database;
DatabaseTaskSynchronizer* m_synchronizer;
#if !LOG_DISABLED
virtual const char* debugTaskName() const = 0;
bool m_complete;
#endif
};
class DatabaseBackend::DatabaseOpenTask : public DatabaseTask {
public:
static std::unique_ptr<DatabaseOpenTask> create(DatabaseBackend* db, bool setVersionInNewDatabase, DatabaseTaskSynchronizer* synchronizer, DatabaseError& error, String& errorMessage, bool& success)
{
return std::unique_ptr<DatabaseOpenTask>(new DatabaseOpenTask(db, setVersionInNewDatabase, synchronizer, error, errorMessage, success));
}
#if PLATFORM(IOS)
virtual bool shouldPerformWhilePaused() const override { return true; }
#endif
private:
DatabaseOpenTask(DatabaseBackend*, bool setVersionInNewDatabase, DatabaseTaskSynchronizer*, DatabaseError&, String& errorMessage, bool& success);
virtual void doPerformTask();
#if !LOG_DISABLED
virtual const char* debugTaskName() const;
#endif
bool m_setVersionInNewDatabase;
DatabaseError& m_error;
String& m_errorMessage;
bool& m_success;
};
class DatabaseBackend::DatabaseCloseTask : public DatabaseTask {
public:
static std::unique_ptr<DatabaseCloseTask> create(DatabaseBackend* db, DatabaseTaskSynchronizer* synchronizer)
{
return std::unique_ptr<DatabaseCloseTask>(new DatabaseCloseTask(db, synchronizer));
}
#if PLATFORM(IOS)
virtual bool shouldPerformWhilePaused() const override { return true; }
#endif
private:
DatabaseCloseTask(DatabaseBackend*, DatabaseTaskSynchronizer*);
virtual void doPerformTask();
#if !LOG_DISABLED
virtual const char* debugTaskName() const;
#endif
};
class DatabaseBackend::DatabaseTransactionTask : public DatabaseTask {
public:
virtual ~DatabaseTransactionTask();
static std::unique_ptr<DatabaseTransactionTask> create(PassRefPtr<SQLTransactionBackend> transaction)
{
return std::unique_ptr<DatabaseTransactionTask>(new DatabaseTransactionTask(transaction));
}
#if PLATFORM(IOS)
virtual bool shouldPerformWhilePaused() const override;
#endif
SQLTransactionBackend* transaction() const { return m_transaction.get(); }
private:
explicit DatabaseTransactionTask(PassRefPtr<SQLTransactionBackend>);
virtual void doPerformTask();
#if !LOG_DISABLED
virtual const char* debugTaskName() const;
#endif
RefPtr<SQLTransactionBackend> m_transaction;
bool m_didPerformTask;
};
class DatabaseBackend::DatabaseTableNamesTask : public DatabaseTask {
public:
static std::unique_ptr<DatabaseTableNamesTask> create(DatabaseBackend* db, DatabaseTaskSynchronizer* synchronizer, Vector<String>& names)
{
return std::unique_ptr<DatabaseTableNamesTask>(new DatabaseTableNamesTask(db, synchronizer, names));
}
#if PLATFORM(IOS)
virtual bool shouldPerformWhilePaused() const override { return true; }
#endif
private:
DatabaseTableNamesTask(DatabaseBackend*, DatabaseTaskSynchronizer*, Vector<String>& names);
virtual void doPerformTask();
#if !LOG_DISABLED
virtual const char* debugTaskName() const;
#endif
Vector<String>& m_tableNames;
};
}
#endif // ENABLE(SQL_DATABASE)
#endif // DatabaseTask_h