event/IdleMonitor: new monitor class
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@ -299,6 +299,7 @@ libevent_a_SOURCES = \
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src/event/WakeFD.hxx \
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src/event/SignalMonitor.hxx src/event/SignalMonitor.cxx \
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src/event/TimeoutMonitor.hxx src/event/TimeoutMonitor.cxx \
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src/event/IdleMonitor.hxx src/event/IdleMonitor.cxx \
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src/event/DeferredMonitor.hxx src/event/DeferredMonitor.cxx \
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src/event/SocketMonitor.cxx src/event/SocketMonitor.hxx \
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src/event/BufferedSocket.cxx src/event/BufferedSocket.hxx \
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64
src/event/IdleMonitor.cxx
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64
src/event/IdleMonitor.cxx
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@ -0,0 +1,64 @@
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "IdleMonitor.hxx"
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#include "Loop.hxx"
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void
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IdleMonitor::Cancel()
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{
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assert(loop.IsInside());
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if (!IsActive())
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return;
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g_source_remove(source_id);
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source_id = 0;
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}
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void
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IdleMonitor::Schedule()
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{
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assert(loop.IsInside());
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if (IsActive())
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/* already scheduled */
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return;
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source_id = loop.AddIdle(Callback, this);
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}
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void
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IdleMonitor::Run()
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{
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assert(loop.IsInside());
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assert(source_id != 0);
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source_id = 0;
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OnIdle();
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}
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gboolean
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IdleMonitor::Callback(gpointer data)
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{
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IdleMonitor &monitor = *(IdleMonitor *)data;
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monitor.Run();
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return false;
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}
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66
src/event/IdleMonitor.hxx
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66
src/event/IdleMonitor.hxx
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@ -0,0 +1,66 @@
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_SOCKET_IDLE_MONITOR_HXX
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#define MPD_SOCKET_IDLE_MONITOR_HXX
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#include "check.h"
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#include <glib.h>
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class EventLoop;
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/**
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* An event that runs when the EventLoop has become idle, before
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* waiting for more events. This class is not thread-safe; all
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* methods must be run from EventLoop's thread.
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*/
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class IdleMonitor {
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EventLoop &loop;
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guint source_id;
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public:
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IdleMonitor(EventLoop &_loop)
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:loop(_loop), source_id(0) {}
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~IdleMonitor() {
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Cancel();
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}
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EventLoop &GetEventLoop() const {
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return loop;
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}
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bool IsActive() const {
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return source_id != 0;
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}
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void Schedule();
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void Cancel();
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protected:
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virtual void OnIdle() = 0;
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private:
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void Run();
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static gboolean Callback(gpointer data);
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};
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#endif /* MAIN_NOTIFY_H */
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