| 1 | /* |
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| 2 | SPDX-FileCopyrightText: 2021 Aleix Pol Gonzalez <aleixpol@kde.org> |
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| 3 | |
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| 4 | SPDX-License-Identifier: LGPL-2.0-only |
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| 5 | */ |
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| 6 | |
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| 7 | #ifndef KSIGNALHANDLER_H |
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| 8 | #define KSIGNALHANDLER_H |
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| 9 | |
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| 10 | #include <QObject> |
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| 11 | #include <kcoreaddons_export.h> |
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| 12 | |
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| 13 | class KSignalHandlerPrivate; |
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| 14 | |
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| 15 | /** |
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| 16 | * Allows getting ANSI C signals and forward them onto the Qt eventloop. |
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| 17 | * |
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| 18 | * It's a singleton as it relies on static data getting defined. |
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| 19 | * |
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| 20 | * \code |
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| 21 | * { |
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| 22 | * KSignalHandler::self()->watchSignal(SIGTERM); |
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| 23 | * connect(KSignalHandler::self(), &KSignalHandler::signalReceived, |
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| 24 | * this, &SomeClass::handleSignal); |
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| 25 | * job->start(); |
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| 26 | * } |
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| 27 | * \endcode |
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| 28 | * |
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| 29 | * @since 5.92 |
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| 30 | */ |
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| 31 | class KCOREADDONS_EXPORT KSignalHandler : public QObject |
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| 32 | { |
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| 33 | Q_OBJECT |
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| 34 | public: |
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| 35 | ~KSignalHandler() override; |
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| 36 | |
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| 37 | /** |
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| 38 | * Adds @p signal to be watched for. Once the process is notified about this signal, @m signalReceived will be emitted with the same @p signal as an |
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| 39 | * argument. |
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| 40 | * |
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| 41 | * @see signalReceived |
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| 42 | */ |
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| 43 | void watchSignal(int signal); |
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| 44 | |
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| 45 | /** |
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| 46 | * Fetches an instance we can use to register our signals. |
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| 47 | */ |
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| 48 | static KSignalHandler *self(); |
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| 49 | |
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| 50 | Q_SIGNALS: |
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| 51 | /** |
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| 52 | * Notifies that @p signal is emitted. |
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| 53 | * |
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| 54 | * To catch a signal, we need to make sure it's registered using @m watchSignal. |
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| 55 | * |
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| 56 | * @see watchSignal |
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| 57 | */ |
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| 58 | void signalReceived(int signal); |
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| 59 | |
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| 60 | private: |
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| 61 | KCOREADDONS_NO_EXPORT KSignalHandler(); |
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| 62 | |
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| 63 | QScopedPointer<KSignalHandlerPrivate> d; |
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| 64 | }; |
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| 65 | |
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| 66 | #endif |
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| 67 | |
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