Function:     HerSignal

Purpose:      Process a Hermes event.

Category:     SYSTEM

File:         herevents.c

Author:       J.P. Terlouw

Use:          HerSignal()

Description:  HerSignal() causes any pending Hermes events to be processed.
              This can be done by an external event loop to wich
              event handling has been delegated, e.g., from a GUI toolkit
              such as Qt.
              It may also be called by a program which wishes
              to have any Hermes events it has caused to be processed
              before other actions are performed.

Related doc:  HerConnect.dc3 

Updates:      Mar  5, 2009: JPT, Document created.
              Feb 22, 2010: JPT, Prevent blocking in absence of pending events.