1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QTHREADPOOL_H
41#define QTHREADPOOL_H
42
43#include <QtCore/qglobal.h>
44
45#include <QtCore/qthread.h>
46#include <QtCore/qrunnable.h>
47
48#include <functional>
49
50QT_REQUIRE_CONFIG(thread);
51
52QT_BEGIN_NAMESPACE
53
54
55class QThreadPoolPrivate;
56class Q_CORE_EXPORT QThreadPool : public QObject
57{
58 Q_OBJECT
59 Q_DECLARE_PRIVATE(QThreadPool)
60 Q_PROPERTY(int expiryTimeout READ expiryTimeout WRITE setExpiryTimeout)
61 Q_PROPERTY(int maxThreadCount READ maxThreadCount WRITE setMaxThreadCount)
62 Q_PROPERTY(int activeThreadCount READ activeThreadCount)
63 Q_PROPERTY(uint stackSize READ stackSize WRITE setStackSize)
64 friend class QFutureInterfaceBase;
65
66public:
67 QThreadPool(QObject *parent = nullptr);
68 ~QThreadPool();
69
70 static QThreadPool *globalInstance();
71
72 void start(QRunnable *runnable, int priority = 0);
73 bool tryStart(QRunnable *runnable);
74
75 void start(std::function<void()> functionToRun, int priority = 0);
76 bool tryStart(std::function<void()> functionToRun);
77
78 int expiryTimeout() const;
79 void setExpiryTimeout(int expiryTimeout);
80
81 int maxThreadCount() const;
82 void setMaxThreadCount(int maxThreadCount);
83
84 int activeThreadCount() const;
85
86 void setStackSize(uint stackSize);
87 uint stackSize() const;
88
89 void reserveThread();
90 void releaseThread();
91
92 bool waitForDone(int msecs = -1);
93
94 void clear();
95
96 bool contains(const QThread *thread) const;
97
98#if QT_DEPRECATED_SINCE(5, 9)
99 QT_DEPRECATED_X("use tryTake(), but note the different deletion rules")
100 void cancel(QRunnable *runnable);
101#endif
102 Q_REQUIRED_RESULT bool tryTake(QRunnable *runnable);
103};
104
105QT_END_NAMESPACE
106
107#endif
108