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Functions
| GSocketService * | g_socket_service_new () |
| void | g_socket_service_start () |
| void | g_socket_service_stop () |
| gboolean | g_socket_service_is_active () |
Description
A GSocketService is an object that represents a service that is provided to the network or over local sockets. When a new connection is made to the service the “incoming” signal is emitted.
A GSocketService is a subclass of GSocketListener and you need to add the addresses you want to accept connections on with the GSocketListener APIs.
There are two options for implementing a network service based on
GSocketService. The first is to create the service using
g_socket_service_new() and to connect to the “incoming”
signal. The second is to subclass GSocketService and override the
default signal handler implementation.
In either case, the handler must immediately return, or else it will block additional incoming connections from being serviced. If you are interested in writing connection handlers that contain blocking code then see GThreadedSocketService.
The socket service runs on the main loop of the thread-default context of the thread it is created in, and is not threadsafe in general. However, the calls to start and stop the service are thread-safe so these can be used from threads that handle incoming clients.
Functions
g_socket_service_new ()
GSocketService *
g_socket_service_new (void);
Creates a new GSocketService with no sockets to listen for.
New listeners can be added with e.g. g_socket_listener_add_address()
or g_socket_listener_add_inet_port().
Since 2.22
g_socket_service_start ()
void
g_socket_service_start (GSocketService *service);
Starts the service, i.e. start accepting connections from the added sockets when the mainloop runs.
This call is thread-safe, so it may be called from a thread handling an incoming client request.
Since 2.22
g_socket_service_stop ()
void
g_socket_service_stop (GSocketService *service);
Stops the service, i.e. stops accepting connections from the added sockets when the mainloop runs.
This call is thread-safe, so it may be called from a thread handling an incoming client request.
Note that this only stops accepting new connections; it does not
close the listening sockets, and you can call
g_socket_service_start() again later to begin listening again. To
close the listening sockets, call g_socket_listener_close(). (This
will happen automatically when the GSocketService is finalized.)
Since 2.22
g_socket_service_is_active ()
gboolean
g_socket_service_is_active (GSocketService *service);
Check whether the service is active or not. An active service will accept new clients that connect, while a non-active service will let connecting clients queue up until the service is started.
Since 2.22
Signal Details
The “incoming” signal
gboolean user_function (GSocketService *service, GSocketConnection *connection, GObject *source_object, gpointer user_data)
The ::incoming signal is emitted when a new incoming connection
to service
needs to be handled. The handler must initiate the
handling of connection
, but may not block; in essence,
asynchronous operations must be used.
connection
will be unreffed once the signal handler returns,
so you need to ref it yourself if you are planning to use it.
Parameters
service |
the GSocketService |
|
connection |
a new GSocketConnection object |
|
source_object |
the source_object passed to
|
[allow-none] |
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since 2.22