Add Qt libs and headers

paho-mqtt3as-proxy/Qt/include/QtCore/qthreadpool.h

@@ -0,0 +1,73 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QTHREADPOOL_H
+#define QTHREADPOOL_H
+
+#include <QtCore/qglobal.h>
+
+#include <QtCore/qthread.h>
+#include <QtCore/qrunnable.h>
+
+#include <functional>
+
+QT_REQUIRE_CONFIG(thread);
+
+QT_BEGIN_NAMESPACE
+
+class QThreadPoolPrivate;
+class Q_CORE_EXPORT QThreadPool : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QThreadPool)
+    Q_PROPERTY(int expiryTimeout READ expiryTimeout WRITE setExpiryTimeout)
+    Q_PROPERTY(int maxThreadCount READ maxThreadCount WRITE setMaxThreadCount)
+    Q_PROPERTY(int activeThreadCount READ activeThreadCount)
+    Q_PROPERTY(uint stackSize READ stackSize WRITE setStackSize)
+    Q_PROPERTY(QThread::Priority threadPriority READ threadPriority WRITE setThreadPriority)
+    friend class QFutureInterfaceBase;
+
+public:
+    QThreadPool(QObject *parent = nullptr);
+    ~QThreadPool();
+
+    static QThreadPool *globalInstance();
+
+    void start(QRunnable *runnable, int priority = 0);
+    bool tryStart(QRunnable *runnable);
+
+    void start(std::function<void()> functionToRun, int priority = 0);
+    bool tryStart(std::function<void()> functionToRun);
+
+    void startOnReservedThread(QRunnable *runnable);
+    void startOnReservedThread(std::function<void()> functionToRun);
+
+    int expiryTimeout() const;
+    void setExpiryTimeout(int expiryTimeout);
+
+    int maxThreadCount() const;
+    void setMaxThreadCount(int maxThreadCount);
+
+    int activeThreadCount() const;
+
+    void setStackSize(uint stackSize);
+    uint stackSize() const;
+
+    void setThreadPriority(QThread::Priority priority);
+    QThread::Priority threadPriority() const;
+
+    void reserveThread();
+    void releaseThread();
+
+    bool waitForDone(int msecs = -1);
+
+    void clear();
+
+    bool contains(const QThread *thread) const;
+
+    [[nodiscard]] bool tryTake(QRunnable *runnable);
+};
+
+QT_END_NAMESPACE
+
+#endif