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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_SOCKET_DEFERRED_MONITOR_HXX
#define MPD_SOCKET_DEFERRED_MONITOR_HXX
#include "check.h"
#include "Compiler.h"
#ifdef USE_EPOLL
#include "SocketMonitor.hxx"
#include "WakeFD.hxx"
#else
#include <glib.h>
#endif
#include <atomic>
class EventLoop;
/**
* Defer execution of an event into an #EventLoop.
*/
class DeferredMonitor
#ifdef USE_EPOLL
: private SocketMonitor
#endif
{
#ifdef USE_EPOLL
std::atomic_bool pending;
WakeFD fd;
#else
EventLoop &loop;
std::atomic<guint> source_id;
#endif
public:
#ifdef USE_EPOLL
DeferredMonitor(EventLoop &_loop)
:SocketMonitor(_loop), pending(false) {
SocketMonitor::Open(fd.Get());
SocketMonitor::Schedule(SocketMonitor::READ);
}
#else
DeferredMonitor(EventLoop &_loop)
:loop(_loop), source_id(0) {}
#endif
~DeferredMonitor() {
#ifdef USE_EPOLL
/* avoid closing the WakeFD twice */
SocketMonitor::Steal();
#else
Cancel();
#endif
}
EventLoop &GetEventLoop() {
#ifdef USE_EPOLL
return SocketMonitor::GetEventLoop();
#else
return loop;
#endif
}
void Schedule();
void Cancel();
protected:
virtual void RunDeferred() = 0;
private:
#ifdef USE_EPOLL
virtual bool OnSocketReady(unsigned flags) override final;
#else
void Run();
static gboolean Callback(gpointer data);
#endif
};
#endif /* MAIN_NOTIFY_H */
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