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// cmdline_main_loop.cc
//
// Copyright (C) 2009 Daniel Burrows
//
// 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; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#include "cmdline_main_loop.h"
#include <boost/make_shared.hpp>
#include <boost/shared_ptr.hpp>
#include <cwidget/generic/threads/threads.h>
#include <generic/util/safe_slot.h>
namespace aptitude
{
namespace cmdline
{
namespace
{
class event_loop
{
boost::shared_ptr<cwidget::threads::mutex> running_mutex;
bool running;
bool exited;
cwidget::threads::event_queue<safe_slot0<void> > eventq;
void do_stop()
{
exited = true;
}
class cancel_running_on_leave_scope
{
event_loop &parent;
public:
cancel_running_on_leave_scope(event_loop &_parent)
: parent(_parent)
{
}
~cancel_running_on_leave_scope()
{
cwidget::threads::mutex::lock l(*parent.running_mutex);
parent.running = false;
}
};
public:
event_loop()
: running_mutex(boost::make_shared<cwidget::threads::mutex>()),
running(false),
exited(false)
{
}
void run()
{
{
cwidget::threads::mutex::lock l(*running_mutex);
if(running)
return;
running = true;
exited = false;
}
cancel_running_on_leave_scope canceler(*this);
while(!exited)
{
safe_slot0<void> thunk(eventq.get());
thunk.get_slot()();
}
}
void post(const safe_slot0<void> &thunk)
{
eventq.put(thunk);
}
void stop()
{
sigc::slot<void> do_stop_slot(sigc::mem_fun(*this, &event_loop::do_stop));
post(make_safe_slot(do_stop_slot));
}
};
event_loop global_event_loop;
}
void main_loop()
{
global_event_loop.run();
}
void exit_main()
{
global_event_loop.stop();
}
void post_thunk(const sigc::slot<void> &thunk)
{
global_event_loop.post(make_safe_slot(thunk));
}
}
}
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