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102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
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/* ============================================================
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* QupZilla - WebKit based browser
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* Copyright (C) 2014 David Rosca <nowrep@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* ============================================================ */
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#ifndef SQLDATABASE_H
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#define SQLDATABASE_H
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#include <QQueue>
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#include <QThread>
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#include <QSqlQuery>
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#include <QSqlDatabase>
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#include "qzcommon.h"
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class QThread;
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class QSqlQuery;
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class DatabaseWorker;
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class DatabaseWorkerThread;
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// Queries are executed in FIFO order
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class QUPZILLA_EXPORT SqlDatabase : public QObject
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{
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Q_OBJECT
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public:
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explicit SqlDatabase(QObject* parent = 0);
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~SqlDatabase();
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// Executes query async and send result if receiver is not null.
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// Slot must have "name(QSqlQuery)" signature
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void execAsync(const QSqlQuery &query, QObject* receiver = 0, const char* slot = 0);
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// Executes transaction async without sending result
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void transactionAsync(const QList<QSqlQuery> &queries);
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// May be called only after creating QSqlDatabase connection in main thread
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static SqlDatabase* instance();
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// Must be called before closing main thread QSqlDatabase connection
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static void destroy();
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private:
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DatabaseWorker* m_worker;
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DatabaseWorkerThread* m_thread;
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static SqlDatabase* s_instance;
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};
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class DatabaseWorker : public QObject
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{
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Q_OBJECT
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public:
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explicit DatabaseWorker();
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void execQueryAsync(const QSqlQuery &query, QObject* receiver = 0, const char* slot = 0);
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void transactionAsync(const QList<QSqlQuery> &queries);
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bool hasPendingQueries() const;
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public slots:
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void threadStarted();
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void execPendingQueries();
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private:
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struct QueryData {
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QList<QSqlQuery> queries;
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QObject* receiver;
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const char* slot;
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};
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QQueue<QueryData> m_queries;
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QSqlDatabase m_db;
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bool m_started;
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};
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class DatabaseWorkerThread : public QThread
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{
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public:
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explicit DatabaseWorkerThread(DatabaseWorker* worker);
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private:
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void run();
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DatabaseWorker* m_worker;
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};
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#endif // SQLDATABASE_H
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