%
% Send -- robust send a message to an object.
%

/ctxget {	% n -- null|thing
	currentprocess /hnctx 2 copy known {
		get dup length 3 -1 roll sub get
	} {pop pop pop null} ifelse
} def

/sender {2 ctxget} def
/target {3 ctxget} def
/message {4 ctxget} def
/args 	{5 ctxget} def

/Send {		% args message target --
	find_object dup null eq {pop pop pop} {
		self soften
		currentprocess /hnctx 2 copy known {get} {pop pop 4 array} ifelse
		currentprocess /OperandStack get 
		currentprocess /hnctx 3 -1 roll put

		clear args aload pop message /deliver target send

		clear currentprocess /hnctx get aload pop
		currentprocess /hnctx 3 -1 roll put
		pop pop pop pop
	} ifelse
} def