src/emc has some 56 references to fields called 'heartbeat', but its unclear
what the intent and semantics are - AFAICT the only using code is in xemc.cc
where it is used for some kind of change detection.
Any idea what that field was supposed to serve? it looks a bit like 'lets see
whether this component is still alive, like executing cyclically', but it isnt
used systematically
the comments are less than helpful:
/* dynamic status-- changes every cycle */
unsigned int heartbeat;
task:emcTaskUpdate() stat->heartbeat++; (used nowhere)
iocontrol.cc:
emcioStatus.heartbeat++;
motion/control.c
/* here ends the core of the controller */
emcmotStatus->heartbeat++;
- Michael
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