refs #380, QConcurrent vs QThread sample and fix

* in same step fixed nullptr issue in worker (with no parent)
* Changed from QConccurennt::run to CWorker in core

samples/blackmisc/main.cpp

@@ -15,6 +15,7 @@
 #include "samplesvariant.h"
 #include "samplesperformance.h"
 #include "samplesalgorithm.h"
+#include "samplesconcurrent.h"
 #include "blackmisc/blackmiscfreefunctions.h"
 #include "blackmisc/pqallquantities.h"
 
@@ -26,25 +27,28 @@ using namespace BlackMiscTest;
  */
 int main(int argc, char *argv[])
 {
-    // QCoreApplication a(argc, argv);
-    Q_UNUSED(argc);
-    Q_UNUSED(argv);
+    QCoreApplication a(argc, argv);;
+    Q_UNUSED(a);
+
+    QTextStream qtout(stdout);
+    QTextStream qtin(stdin);
 
     BlackMisc::initResources();
     BlackMisc::registerMetadata();
 
     do
     {
-        qDebug() << "1 .. JSON";
-        qDebug() << "2 .. Change object";
-        qDebug() << "3 .. Containers";
-        qDebug() << "4 .. Metadata";
-        qDebug() << "5 .. Variant";
-        qDebug() << "6 .. Performance";
-        qDebug() << "7 .. Algorithms";
-        qDebug() << "-----";
-        qDebug() << "x .. Bye";
-        QTextStream qtin(stdin);
+        qtout << "1 .. JSON" << endl;
+        qtout << "2 .. Change object" << endl;
+        qtout << "3 .. Containers" << endl;
+        qtout << "4 .. Metadata" << endl;
+        qtout << "5 .. Variant" << endl;
+        qtout << "6 .. Performance" << endl;
+        qtout << "7 .. Algorithms" << endl;
+        qtout << "8 .. Concurrent (thread)" << endl;
+
+        qtout << "-----" << endl;
+        qtout << "x .. Bye" << endl;
         QString s = qtin.readLine().toLower().trimmed();
 
         if (s.startsWith("1")) { CSamplesJson::samples(); }
@@ -54,6 +58,7 @@ int main(int argc, char *argv[])
         else if (s.startsWith("5")) { CSamplesVariant::samples(); }
         else if (s.startsWith("6")) { CSamplesPerformance::samples(); }
         else if (s.startsWith("7")) { CSamplesAlgorithm::samples(); }
+        else if (s.startsWith("8")) { CSamplesConcurrent::samples(s, qtout, qtin); }
         else if (s.startsWith("x")) { break; }
     }
     while (true);

samples/blackmisc/samplesconcurrent.cpp

@@ -0,0 +1,103 @@
+/* Copyright (C) 2015
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "samplesconcurrent.h"
+#include "blackmisc/algorithm.h"
+#include <QDebug>
+#include <QCoreApplication>
+#include <QtConcurrent/QtConcurrent>
+#include <QString>
+
+using namespace BlackMisc;
+
+namespace BlackMiscTest
+{
+
+    int CSamplesConcurrent::samples(const QString &type, QTextStream &out, QTextStream &in)
+    {
+        Q_UNUSED(in);
+        Q_UNUSED(type);
+
+        out << "Main thread id: " << QThread::currentThreadId() << endl;
+        CThreadOutput b1("b1");
+        b1.start();
+        CThreadOutput b2("b2");
+        b2.start();
+        CThreadOutput b3("b3");
+        b3.start();
+        QThread::msleep(10 * 1000);
+        b1.stop();
+        b2.stop();
+        b3.stop();
+        QThread::msleep(1 * 1000); // allow to stop
+
+        out << "Main thread id: " << QThread::currentThreadId() << endl;
+        CConcurrentOutput c1("c1");
+        QtConcurrent::run(&c1, &CConcurrentOutput::doWork);
+        CConcurrentOutput c2("c2");
+        QtConcurrent::run(&c2, &CConcurrentOutput::doWork);
+        CConcurrentOutput c3("c3");
+        QtConcurrent::run(&c3, &CConcurrentOutput::doWork);
+        QThread::msleep(10 * 1000);
+        c1.stop();
+        c2.stop();
+        // stop 2, but then wait and see whats happening
+        out << "stopped c1, c2" << endl;
+        QThread::msleep(5 * 1000);
+        out << "stopped c3" << endl;
+        c3.stop();
+        QThread::msleep(1 * 1000); // allow to stop
+
+        return 0;
+    }
+
+    CThreadOutput::CThreadOutput(const QString &name, QObject *parent) :
+        CContinuousWorker(parent, name)
+    { }
+
+    void CThreadOutput::doWork()
+    {
+        QTextStream out(stdout);
+        while (m_run)
+        {
+            out << this->objectName() << " worker id: " << QThread::currentThreadId() << endl;
+            QThread::msleep(1000);
+        }
+    }
+
+    void CThreadOutput::stop()
+    {
+        m_run = false;
+    }
+
+    void CThreadOutput::initialize()
+    {
+        this->doWork();
+    }
+
+    CConcurrentOutput::CConcurrentOutput(const QString &name, QObject *parent) :
+        QObject(parent), m_name(name)
+    { }
+
+    void CConcurrentOutput::stop()
+    {
+        m_run = false;
+    }
+
+    void CConcurrentOutput::doWork()
+    {
+        QTextStream out(stdout);
+        while (m_run)
+        {
+            out << m_name << " worker id: " << QThread::currentThreadId() << endl;
+            QThread::msleep(1000);
+        }
+    }
+
+} // namespace

samples/blackmisc/samplesconcurrent.h

@@ -0,0 +1,78 @@
+/* Copyright (C) 2015
+ * swift Project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of Swift Project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKMISCTEST_SAMPLESCONCURRENT_H
+#define BLACKMISCTEST_SAMPLESCONCURRENT_H
+
+#include "blackmisc/worker.h"
+#include <QTextStream>
+#include <atomic>
+
+namespace BlackMiscTest
+{
+
+    //! Samples for metadata
+    class CSamplesConcurrent
+    {
+    public:
+        //! Run the samples
+        static int samples(const QString &type, QTextStream &out, QTextStream &in);
+    };
+
+    //! Doing some work
+    class CThreadOutput : public BlackMisc::CContinuousWorker
+    {
+        Q_OBJECT
+
+    public:
+        //! Constructor
+        CThreadOutput(const QString &name, QObject *parent = nullptr);
+
+        //! Working task
+        void doWork();
+
+        //! Stop
+        void stop();
+
+    protected slots:
+        //! \copydoc CContinuousWorker::initialize
+        virtual void initialize() override;
+
+    private:
+        std::atomic<bool> m_run { true };
+    };
+
+    //! Doing some work
+    class CConcurrentOutput : public QObject
+    {
+        Q_OBJECT
+
+    public:
+        //! Constructor
+        CConcurrentOutput(const QString &name, QObject *parent = nullptr);
+
+        //! Stop
+        void stop();
+
+    public slots:
+        //! Working task
+        void doWork();
+
+    private:
+        std::atomic<bool> m_run { true };
+        QString m_name;
+    };
+
+
+
+} // namespace
+
+#endif

src/blackmisc/worker.cpp

@@ -46,8 +46,11 @@ namespace BlackMisc
 
         auto *thread = new CRegularThread(m_owner);
 
-        QString ownerName = m_owner->objectName().isEmpty() ? m_owner->metaObject()->className() : m_owner->objectName();
-        thread->setObjectName(ownerName + ":" + m_name);
+        if (m_owner)
+        {
+            QString ownerName = m_owner->objectName().isEmpty() ? m_owner->metaObject()->className() : m_owner->objectName();
+            thread->setObjectName(ownerName + ":" + m_name);
+        }
         setObjectName(m_name);
 
         moveToThread(thread);

src/blackmisc/worker.h

@@ -249,7 +249,7 @@ namespace BlackMisc
         void ps_finish();
 
     private:
-        QObject *m_owner;
+        QObject *m_owner = nullptr;
         QString m_name;
     };
 

src/swiftcore/main.cpp

@@ -13,6 +13,7 @@
 #include "blackcore/context_application.h"
 #include "blackcore/context_application_impl.h"
 #include "blackmisc/icons.h"
+#include "blackmisc/worker.h"
 #include "blackmisc/networkutils.h"
 #include "blackmisc/blackmiscfreefunctions.h"
 #include "blackmisc/project.h"
@@ -81,8 +82,12 @@ int main(int argc, char *argv[])
 
     // tool to allow input indepent from event loop
     cout << "Will start server loop ... " << endl;
-    QFuture<void> future = QtConcurrent::run(BlackMiscTest::Tool::serverLoop, coreRuntime);
-    Q_UNUSED(future);
+    BlackMisc::CWorker *worker = BlackMisc::CWorker::fromTask(coreRuntime, "BlackMiscTest::Tool::serverLoop", [coreRuntime]()
+    {
+        BlackMiscTest::Tool::serverLoop(coreRuntime);
+    });
+
+    Q_UNUSED(worker);
     cout << "Server event loop, pid: " << BlackMiscTest::Tool::getPid() << " Thread id: " << QThread::currentThreadId() << endl;
 
     // end