Gio.DBusProxy.call

### Method

# Gio DBusProxycall

since: 2.26

#### Declaration

    void
    g_dbus_proxy_call (
      GDBusProxy* proxy,
      const gchar* method_name,
      GVariant* parameters,
      GDBusCallFlags flags,
      gint timeout_msec,
      GCancellable* cancellable,
      GAsyncReadyCallback callback,
      gpointer user_data
    )

#### Description

Asynchronously invokes the `method_name` method on `proxy`.

If `method_name` contains any dots, then `name` is split into interface and method name parts. This allows using `proxy` for invoking methods on other interfaces.

If the `GDBusConnection` associated with `proxy` is closed then the operation will fail with `G_IO_ERROR_CLOSED`. If `cancellable` is canceled, the operation will fail with `G_IO_ERROR_CANCELLED`. If `parameters` contains a value not compatible with the D-Bus protocol, the operation fails with `G_IO_ERROR_INVALID_ARGUMENT`.

If the `parameters` `GVariant` is floating, it is consumed. This allows convenient ‘inline’ use of g_variant_new(), e.g.:

     g_dbus_proxy_call (proxy,
                        "TwoStrings",
                        g_variant_new ("(ss)",
                                       "Thing One",
                                       "Thing Two"),
                        G_DBUS_CALL_FLAGS_NONE,
                        -1,
                        NULL,
                        (GAsyncReadyCallback) two_strings_done,
                        &data);

If `proxy` has an expected interface (see `GDBusProxy:g-interface-info`) and `method_name` is referenced by it, then the return value is checked against the return type.

This is an asynchronous method. When the operation is finished, `callback` will be invoked in the [thread-default main context][g-main-context-push-thread-default] of the thread you are calling this method from. You can then call `g_dbus_proxy_call_finish()` to get the result of the operation. See `g_dbus_proxy_call_sync()` for the synchronous version of this method.

If `callback` is `NULL` then the D-Bus method call message will be sent with the `G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED` flag set.

Available since: 2.26

#### Parameters

`method_name`

  Type: `const gchar*`

  Name of method to invoke.

  The data is owned by the caller of the method.
  The value is a NUL terminated UTF-8 string.

`parameters`

  Type: `GVariant`

  A `GVariant` tuple with parameters for the signal or `NULL` if not passing parameters.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`flags`

  Type: `GDBusCallFlags`

  Flags from the `GDBusCallFlags` enumeration.

`timeout_msec`

  Type: `gint`

  The timeout in milliseconds (with `G_MAXINT` meaning “infinite”) or -1 to use the proxy default timeout.

`cancellable`

  Type: `GCancellable`

  A `GCancellable` or `NULL`.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`callback`

  Type: `GAsyncReadyCallback`

  A `GAsyncReadyCallback` to call when the request is satisfied or `NULL` if you don’t care about the result of the method invocation.

  The argument can be `NULL`.

`user_data`

  Type: `gpointer`

  The data to pass to `callback`.

  The argument can be `NULL`.
  The data is owned by the caller of the method.