Rebol Programming/dispatch

= USAGE: = DISPATCH port-block

= DESCRIPTION: = Wait for a block of ports. As events happen, dispatch port handler blocks.

DISPATCH is a function value. = ARGUMENTS =
 * port-block -- Block of port handler pairs (port can be timeout too). (Type: block)

= SOURCE CODE = dispatch: func [ {Wait for a block of ports. As events happen, dispatch port handler blocks.} port-block [block!] {Block of port handler pairs (port can be timeout too).} /local ports awake timeblk result ][   ports: copy [] foreach [port job] port-block: reduce port-block [ if any [number? port time? port] [if none? timeblk [timeblk: :job]] append ports port ]    forever [ either awake: wait/all ports [ if foreach item awake [ set/any 'result do select port-block item item if all [value? 'result 'break = :result] [break/return true] ] [break] ] [do :timeblk] ] ]