
readpipe - reading from a pipe

Calling sequence:
readpipe(expr, integer)
readpipe(expr, integer, Block)

Parameter:
expr      --  expression
integer   --  number of a processor node

Summary:

readpipe(expr, integer) reads a datum from the pipe with the name expr
that comes from the clusterwith the number integer.  expr can be any
datum.  If no value is in the pipe at this time then the function returns a
datum of the type DOM_NULL.

readpipe(expr, integer, Block) reads a datum from the pipe with the
name expr that comes from the cluster with the number integer. If the pipe
contains no value at the present time then the function waits until a datum
is written into the pipe and then returns this. readpipe is a kernel function.

See also:  writepipe , readqueue , writequeue

