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97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*
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Copyright © 2014-2015 by The qTox Project
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This file is part of qTox, a Qt-based graphical interface for Tox.
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qTox is libre software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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qTox is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with qTox. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef IPC_H
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#define IPC_H
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#include <ctime>
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#include <functional>
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#include <QMap>
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#include <QObject>
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#include <QSharedMemory>
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#include <QTimer>
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#include <QVector>
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using IPCEventHandler = std::function<bool (const QByteArray&)>;
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#define IPC_PROTOCOL_VERSION "2"
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class IPC : public QObject
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{
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Q_OBJECT
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IPC();
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protected:
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static const int EVENT_TIMER_MS = 1000;
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static const int EVENT_GC_TIMEOUT = 5;
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static const int EVENT_QUEUE_SIZE = 32;
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static const int OWNERSHIP_TIMEOUT_S = 5;
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public:
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~IPC();
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static IPC& getInstance();
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struct IPCEvent
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{
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uint32_t dest;
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int32_t sender;
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char name[16];
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char data[128];
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time_t posted;
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time_t processed;
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uint32_t flags;
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bool accepted;
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bool global;
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};
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struct IPCMemory
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{
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uint64_t globalId;
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// When last event was posted
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time_t lastEvent;
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// When processEvents() ran last time
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time_t lastProcessed;
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IPCEvent events[IPC::EVENT_QUEUE_SIZE];
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};
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// dest: Settings::getCurrentProfileId() or 0 (main instance).
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time_t postEvent(const QString& name, const QByteArray &data=QByteArray(), uint32_t dest=0);
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bool isCurrentOwner();
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void registerEventHandler(const QString& name, IPCEventHandler handler);
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bool isEventAccepted(time_t time);
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bool waitUntilAccepted(time_t time, int32_t timeout=-1);
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protected slots:
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void processEvents();
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protected:
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IPCMemory* global();
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bool runEventHandler(IPCEventHandler handler, const QByteArray& arg);
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// Only called when global memory IS LOCKED, returns 0 if no evnts present
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IPCEvent* fetchEvent();
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QTimer timer;
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uint64_t globalId;
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QSharedMemory globalMemory;
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QMap<QString, IPCEventHandler> eventHandlers;
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};
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#endif // IPC_H
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