5 Calling methods non-blocking.

Function: dbus-call-method-asynchronously bus service path interface method handler &optional :timeout timeout &rest args

This function calls method on the D-Bus bus asynchronously. bus is either the symbol :system or the symbol :session.

service is the D-Bus service name to be used. path is the D-Bus object path, service is registered at. interface is an interface offered by service. It must provide method.

handler is a Lisp function, which is called when the corresponding return message has arrived. If handler is nil, no return message will be expected.

If the parameter :timeout is given, the following integer timeout specifies the maximum number of milliseconds a reply message must arrive. The default value is 25,000. If there is no reply message in time, a D-Bus error is raised (see Errors and Events).

All other arguments args are passed to method as arguments. They are converted into D-Bus types as described in Type Conversion.

If handler is a Lisp function, the function returns a key into the hash table dbus-registered-objects-table. The corresponding entry in the hash table is removed, when the return message has been arrived, and handler is called. Example:

(dbus-call-method-asynchronously
  :system "org.freedesktop.Hal"
  "/org/freedesktop/Hal/devices/computer"
  "org.freedesktop.Hal.Device" "GetPropertyString" 'message
  "system.kernel.machine")

⇒ (:serial :system 2)

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