%T A method for monitoring occam internal channels
%A  A. d\[rs]Acierno,  Giuseppe de Pietro,  Umberto Villano
%E  Stephen J. Turner
%B OUG\-12: Tools and Techniques for Transputer Applications
%X In a Transputer environment, where the data exchange and the
   synchronizations between any two processes are carried out
   by means of I/O operations, the monitoring of the channels
   used for implementing the message exchange is of particular
   interest. In this paper a method is illustrated for
   monitoring the internal channels of an Occam program. This
   method introduces little CPU overhead, no additional
   communication cost, and preserves the synchronization
   behaviour of the two communicating processes. Its
   characteristics have been attained by means of a particular
   monitoring mechanism, based upon a rather unusual use of
   some Transputer machine language instructions, canonically
   used to implement guarded communications within the Occam
   ALT construct.