/*
 * Licensed under the GNU Lesser General Public License Version 3
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the license, or
 * (at your option) any later version.
 *
 * This software 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

// generated automatically - do not change


module gio.ThreadedSocketService;

private import gio.SocketConnection;
private import gio.SocketService;
private import gio.c.functions;
public  import gio.c.types;
private import glib.ConstructionException;
private import gobject.ObjectG;
private import gobject.Signals;
private import std.algorithm;


/**
 * A #GThreadedSocketService is a simple subclass of #GSocketService
 * that handles incoming connections by creating a worker thread and
 * dispatching the connection to it by emitting the
 * #GThreadedSocketService::run signal in the new thread.
 * 
 * The signal handler may perform blocking IO and need not return
 * until the connection is closed.
 * 
 * The service is implemented using a thread pool, so there is a
 * limited amount of threads available to serve incoming requests.
 * The service automatically stops the #GSocketService from accepting
 * new connections when all threads are busy.
 * 
 * As with #GSocketService, you may connect to #GThreadedSocketService::run,
 * or subclass and override the default handler.
 *
 * Since: 2.22
 */
public class ThreadedSocketService : SocketService
{
	/** the main Gtk struct */
	protected GThreadedSocketService* gThreadedSocketService;

	/** Get the main Gtk struct */
	public GThreadedSocketService* getThreadedSocketServiceStruct(bool transferOwnership = false)
	{
		if (transferOwnership)
			ownedRef = false;
		return gThreadedSocketService;
	}

	/** the main Gtk struct as a void* */
	protected override void* getStruct()
	{
		return cast(void*)gThreadedSocketService;
	}

	protected override void setStruct(GObject* obj)
	{
		gThreadedSocketService = cast(GThreadedSocketService*)obj;
		super.setStruct(obj);
	}

	/**
	 * Sets our main struct and passes it to the parent class.
	 */
	public this (GThreadedSocketService* gThreadedSocketService, bool ownedRef = false)
	{
		this.gThreadedSocketService = gThreadedSocketService;
		super(cast(GSocketService*)gThreadedSocketService, ownedRef);
	}


	/** */
	public static GType getType()
	{
		return g_threaded_socket_service_get_type();
	}

	/**
	 * Creates a new #GThreadedSocketService with no listeners. Listeners
	 * must be added with one of the #GSocketListener "add" methods.
	 *
	 * Params:
	 *     maxThreads = the maximal number of threads to execute concurrently
	 *         handling incoming clients, -1 means no limit
	 *
	 * Returns: a new #GSocketService.
	 *
	 * Since: 2.22
	 *
	 * Throws: ConstructionException GTK+ fails to create the object.
	 */
	public this(int maxThreads)
	{
		auto p = g_threaded_socket_service_new(maxThreads);

		if(p is null)
		{
			throw new ConstructionException("null returned by new");
		}

		this(cast(GThreadedSocketService*) p, true);
	}

	protected class OnRunDelegateWrapper
	{
		static OnRunDelegateWrapper[] listeners;
		bool delegate(SocketConnection, ObjectG, ThreadedSocketService) dlg;
		gulong handlerId;

		this(bool delegate(SocketConnection, ObjectG, ThreadedSocketService) dlg)
		{
			this.dlg = dlg;
			this.listeners ~= this;
		}

		void remove(OnRunDelegateWrapper source)
		{
			foreach(index, wrapper; listeners)
			{
				if (wrapper.handlerId == source.handlerId)
				{
					listeners[index] = null;
					listeners = std.algorithm.remove(listeners, index);
					break;
				}
			}
		}
	}

	/**
	 * The ::run signal is emitted in a worker thread in response to an
	 * incoming connection. This thread is dedicated to handling
	 * @connection and may perform blocking IO. The signal handler need
	 * not return until the connection is closed.
	 *
	 * Params:
	 *     connection = a new #GSocketConnection object.
	 *     sourceObject = the source_object passed to g_socket_listener_add_address().
	 *
	 * Returns: %TRUE to stop further signal handlers from being called
	 */
	gulong addOnRun(bool delegate(SocketConnection, ObjectG, ThreadedSocketService) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
	{
		auto wrapper = new OnRunDelegateWrapper(dlg);
		wrapper.handlerId = Signals.connectData(
			this,
			"run",
			cast(GCallback)&callBackRun,
			cast(void*)wrapper,
			cast(GClosureNotify)&callBackRunDestroy,
			connectFlags);
		return wrapper.handlerId;
	}

	extern(C) static int callBackRun(GThreadedSocketService* threadedsocketserviceStruct, GSocketConnection* connection, GObject* sourceObject, OnRunDelegateWrapper wrapper)
	{
		return wrapper.dlg(ObjectG.getDObject!(SocketConnection)(connection), ObjectG.getDObject!(ObjectG)(sourceObject), wrapper.outer);
	}

	extern(C) static void callBackRunDestroy(OnRunDelegateWrapper wrapper, GClosure* closure)
	{
		wrapper.remove(wrapper);
	}
}