| 1 | /* -*- C++ -*- |
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| 2 | This file is part of ThreadWeaver, a KDE framework. |
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| 3 | |
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| 4 | SPDX-FileCopyrightText: 2013 Mirko Boehm <mirko@kde.org> |
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| 5 | |
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| 6 | SPDX-License-Identifier: LGPL-2.0-or-later |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef THREADWEAVER_QUEUESIGNALS_H |
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| 10 | #define THREADWEAVER_QUEUESIGNALS_H |
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| 11 | |
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| 12 | #include "queueinterface.h" |
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| 13 | #include <QObject> |
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| 14 | |
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| 15 | namespace ThreadWeaver |
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| 16 | { |
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| 17 | namespace Private |
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| 18 | { |
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| 19 | class QueueSignals_Private; |
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| 20 | } |
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| 21 | |
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| 22 | /** @brief QueueSignals declares the Qt signals shared by the Queue and Weaver classes. */ |
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| 23 | class THREADWEAVER_EXPORT QueueSignals : public QObject, public QueueInterface |
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| 24 | { |
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| 25 | Q_OBJECT |
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| 26 | public: |
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| 27 | explicit QueueSignals(QObject *parent = nullptr); |
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| 28 | explicit QueueSignals(ThreadWeaver::Private::QueueSignals_Private *d, QObject *parent = nullptr); |
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| 29 | ~QueueSignals() override; |
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| 30 | |
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| 31 | Q_SIGNALS: |
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| 32 | /** @brief Emitted when the Queue has completed all jobs currently queued. |
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| 33 | * |
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| 34 | * The Queue emits finished() when the job queue is empty, and the last job currently processed by a worker threads was |
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| 35 | * completed. Beware that if multiple jobs are enqueued repeatedly one by one, this signal might be emitted multiple times, because the |
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| 36 | * queued jobs where processed before new ones could be queued. To avoid this, queue all relevant jobs in a single operation, |
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| 37 | * using for example a QueueStream or a Collection. |
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| 38 | */ |
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| 39 | void finished(); |
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| 40 | |
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| 41 | /** @brief The Queue has been suspended. |
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| 42 | * |
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| 43 | * When the Queue is suspended, worker threads will not be assigned new jobs to process. Jobs waiting in the queue will not be |
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| 44 | * started until processing is resumed. When suspend() is called, the worker threads will continue to process the job currently |
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| 45 | * assigned to them. When the last thread finishes it's current assignment, suspended() is emitted. |
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| 46 | * |
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| 47 | * @see suspend() |
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| 48 | */ |
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| 49 | void suspended(); |
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| 50 | |
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| 51 | /** @brief Emitted when the processing state of the Queue has changed. */ |
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| 52 | void stateChanged(ThreadWeaver::State *); |
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| 53 | |
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| 54 | protected: |
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| 55 | ThreadWeaver::Private::QueueSignals_Private *d(); |
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| 56 | const ThreadWeaver::Private::QueueSignals_Private *d() const; |
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| 57 | |
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| 58 | private: |
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| 59 | ThreadWeaver::Private::QueueSignals_Private *m_d; |
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| 60 | }; |
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| 61 | |
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| 62 | } |
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| 63 | |
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| 64 | #endif // THREADWEAVER_QUEUESIGNALS_H |
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| 65 | |
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