/* GIO - GLib Input, Output and Streaming Library * * Copyright © 2009 Codethink Limited * Copyright © 2009 Red Hat, Inc * * This program 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 2 of the licence or (at * your option) any later version. * * This library 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, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307, USA. * * Authors: Ryan Lortie * Alexander Larsson */ /** * SECTION:gthreadedsocketservice * @title: GThreadedSocketService * @short_description: A threaded GSocketService * @include: gio/gio.h * @see_also: #GSocketService. * * 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. */ #include "config.h" #include "gsocketconnection.h" #include "gthreadedsocketservice.h" #include "glibintl.h" struct _GThreadedSocketServicePrivate { GThreadPool *thread_pool; int max_threads; gint job_count; }; static guint g_threaded_socket_service_run_signal; G_DEFINE_TYPE_WITH_PRIVATE (GThreadedSocketService, g_threaded_socket_service, G_TYPE_SOCKET_SERVICE) enum { PROP_0, PROP_MAX_THREADS }; G_LOCK_DEFINE_STATIC(job_count); typedef struct { GThreadedSocketService *service; GSocketConnection *connection; GObject *source_object; } GThreadedSocketServiceData; static void g_threaded_socket_service_func (gpointer _data, gpointer user_data) { GThreadedSocketService *threaded = user_data; GThreadedSocketServiceData *data = _data; gboolean result; g_signal_emit (data->service, g_threaded_socket_service_run_signal, 0, data->connection, data->source_object, &result); g_object_unref (data->service); g_object_unref (data->connection); if (data->source_object) g_object_unref (data->source_object); g_slice_free (GThreadedSocketServiceData, data); G_LOCK (job_count); if (threaded->priv->job_count-- == threaded->priv->max_threads) g_socket_service_start (G_SOCKET_SERVICE (threaded)); G_UNLOCK (job_count); } static gboolean g_threaded_socket_service_incoming (GSocketService *service, GSocketConnection *connection, GObject *source_object) { GThreadedSocketService *threaded; GThreadedSocketServiceData *data; threaded = G_THREADED_SOCKET_SERVICE (service); data = g_slice_new (GThreadedSocketServiceData); data->service = g_object_ref (service); data->connection = g_object_ref (connection); if (source_object) data->source_object = g_object_ref (source_object); else data->source_object = NULL; G_LOCK (job_count); if (++threaded->priv->job_count == threaded->priv->max_threads) g_socket_service_stop (service); G_UNLOCK (job_count); g_thread_pool_push (threaded->priv->thread_pool, data, NULL); return FALSE; } static void g_threaded_socket_service_init (GThreadedSocketService *service) { service->priv = g_threaded_socket_service_get_instance_private (service); service->priv->max_threads = 10; } static void g_threaded_socket_service_constructed (GObject *object) { GThreadedSocketService *service = G_THREADED_SOCKET_SERVICE (object); service->priv->thread_pool = g_thread_pool_new (g_threaded_socket_service_func, service, service->priv->max_threads, FALSE, NULL); } static void g_threaded_socket_service_finalize (GObject *object) { GThreadedSocketService *service = G_THREADED_SOCKET_SERVICE (object); g_thread_pool_free (service->priv->thread_pool, FALSE, TRUE); G_OBJECT_CLASS (g_threaded_socket_service_parent_class) ->finalize (object); } static void g_threaded_socket_service_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GThreadedSocketService *service = G_THREADED_SOCKET_SERVICE (object); switch (prop_id) { case PROP_MAX_THREADS: g_value_set_int (value, service->priv->max_threads); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void g_threaded_socket_service_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GThreadedSocketService *service = G_THREADED_SOCKET_SERVICE (object); switch (prop_id) { case PROP_MAX_THREADS: service->priv->max_threads = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void g_threaded_socket_service_class_init (GThreadedSocketServiceClass *class) { GObjectClass *gobject_class = G_OBJECT_CLASS (class); GSocketServiceClass *ss_class = &class->parent_class; gobject_class->constructed = g_threaded_socket_service_constructed; gobject_class->finalize = g_threaded_socket_service_finalize; gobject_class->set_property = g_threaded_socket_service_set_property; gobject_class->get_property = g_threaded_socket_service_get_property; ss_class->incoming = g_threaded_socket_service_incoming; /** * GThreadedSocketService::run: * @service: the #GThreadedSocketService. * @connection: a new #GSocketConnection object. * @source_object: the source_object passed to g_socket_listener_add_address(). * * 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. * * Returns: %TRUE to stop further signal handlers from being called */ g_threaded_socket_service_run_signal = g_signal_new ("run", G_TYPE_FROM_CLASS (class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GThreadedSocketServiceClass, run), g_signal_accumulator_true_handled, NULL, NULL, G_TYPE_BOOLEAN, 2, G_TYPE_SOCKET_CONNECTION, G_TYPE_OBJECT); g_object_class_install_property (gobject_class, PROP_MAX_THREADS, g_param_spec_int ("max-threads", P_("Max threads"), P_("The max number of threads handling clients for this service"), -1, G_MAXINT, 10, G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } /** * g_threaded_socket_service_new: * @max_threads: the maximal number of threads to execute concurrently * handling incoming clients, -1 means no limit * * Creates a new #GThreadedSocketService with no listeners. Listeners * must be added with one of the #GSocketListener "add" methods. * * Returns: a new #GSocketService. * * Since: 2.22 */ GSocketService * g_threaded_socket_service_new (int max_threads) { return g_object_new (G_TYPE_THREADED_SOCKET_SERVICE, "max-threads", max_threads, NULL); }