[PD] questions about [send]/[receive]

[rolfm at dds.nl]

hi list,

to not make a maze of a complicated patch
i use quite often send/receive objects inside the patch.

triggered by the recent thread about execution order and depth-first,
i'm starting to doubt the above mentioned habit.

in an much older thread it is said that:
  apart from the "right to left" rule for outlets (and inlets?)
and the "depth first" rule,
execution order in Pd is not defined.

does it mean that there's nothing to say/know about send/receive's?

for example:

when 2 different [send A]'s go to the same [receive A] will there be  
used a "first-in first-out" procedure?

[send]/[receive]'s inside a subpatch are they handled before  
[send]/[receive]'s which 'cross the border' of the subpatch?

any info about Pd's 'stack handling' is also appreciated.

rolf