ReturnToMaster (Daemon subroutine)

Return control to the master thread (Daemon class)

[Introduced in Sirius Mods 8.1]

This method returns control from a daemon thread to its master thread inside a User Language request.

Syntax

%(Daemon):ReturnToMaster

Syntax terms

%(Daemon)	The class name in parentheses denotes a shared method. ReturnToMaster can also be invoked via a Daemon object variable, which may be Null.

Usage notes

• If not issued on a daemon thread, ReturnToMaster results in a request cancellation.
• A daemon can return objects to the master thread before invoking ReturnToMaster with the ReturnObject and ReturnInfoObject methods.
• The master thread would return control with the Continue, ContinueAsynchronously, or ContinueIndependently method. These methods can be used to pass an object to the daemon thread.
• As with the Run methods, a daemon thread can retrieve the object passed to it by a Continue method with the GetInputObject method.

  Examples

  In the following silly example, a daemon thread adds numbers passed to it in an XmlDoc by the master thread and returns the result in another XmlDoc:

  b %doc is object xmlDoc %i is float %nodes is object xmlNodelist %result is float repeat forever %doc = new %doc:addElement('result', %result)  %(daemon):returnToMaster  %(daemon):getInputObject(%doc) %nodes = %doc:selectNodes('/sum/number') if %nodes:count eq 0 then loop end; end if %result = 0 for %i from 1 to %nodes:count %result = %nodes(%i):value end for end repeat end

  See also

  Daemon class	List of Daemon methods	Daemon methods syntax
  Notation conventions for methods