/*
  This file is part of Ingen.
  Copyright 2007-2012 David Robillard <http://drobilla.net/>

  Ingen is free software: you can redistribute it and/or modify it under the
  terms of the GNU Affero General Public License as published by the Free
  Software Foundation, either version 3 of the License, or any later version.

  Ingen 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 Affero General Public License for details.

  You should have received a copy of the GNU Affero General Public License
  along with Ingen.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "raul/log.hpp"
#include "ingen/Patch.hpp"
#include "ingen/Plugin.hpp"
#include "ingen/Port.hpp"
#include "ingen/client/ThreadedSigClientInterface.hpp"

using namespace std;
using namespace Raul;

namespace Ingen {
namespace Client {

/** Push an event (from the engine, ie 'new patch') on to the queue.
 */
void
ThreadedSigClientInterface::push_sig(Closure ev)
{
	bool success = false;
	while (!success) {
		success = _sigs.push(ev);
		if (!success) {
			warn << "Client event queue full.  Waiting..." << endl;
			_mutex.lock();
			_cond.wait(_mutex);
			_mutex.unlock();
			warn << "Queue drained, continuing" << endl;
		}
	}
}

/** Process all queued events that came from the OSC thread.
 *
 * This function should be called from the Gtk thread to emit signals and cause
 * the connected methods to execute.
 */
bool
ThreadedSigClientInterface::emit_signals()
{
	// Process a limited number of events, to prevent locking the GTK
	// thread indefinitely while processing continually arriving events

	size_t num_processed = 0;
	while (!_sigs.empty() && num_processed++ < (_sigs.capacity() * 3 / 4)) {
		Closure& ev = _sigs.front();
		ev();
		ev.disconnect();
		_sigs.pop();
	}

	_mutex.lock();
	_cond.broadcast();
	_mutex.unlock();

	return true;
}

} // namespace Client
} // namespace Ingen