blob: fa6d89c3556505e5557ecd0bea15b233bcfcb6b6 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
(function producer [
; produce numbers 1 to 5 on a channel
((default-scope scope-address) <- new (scope literal) (30 literal))
((chan channel-address) <- next-input)
; n = 0
((n integer) <- copy (0 literal))
{ begin
((done? boolean) <- less-than (n integer) (5 literal))
(break-unless (done? boolean))
; other threads might get between these prints
(print-primitive ("produce: " literal))
(print-primitive (n integer))
(print-primitive ("\n" literal))
; 'box' n into a dynamically typed 'tagged value' because that's what
; channels take
((n2 integer-address) <- new (integer literal))
((n2 integer-address deref) <- copy (n integer))
((n3 tagged-value-address) <- new-tagged-value (integer-address literal) (n2 integer-address))
((chan channel-address deref) <- write (chan channel-address) (n3 tagged-value-address deref))
((n integer) <- add (n integer) (1 literal))
(loop)
}
])
(function consumer [
; consume and print integers from a channel
((default-scope scope-address) <- new (scope literal) (30 literal))
((chan channel-address) <- next-input)
{ begin
; read a tagged value from the channel
((x tagged-value) (chan channel-address deref) <- read (chan channel-address))
; unbox the tagged value into an integer
((n2 integer-address) <- maybe-coerce (x tagged-value) (integer-address literal))
; other threads might get between these prints
(print-primitive ("consume: " literal))
(print-primitive (n2 integer-address deref))
(print-primitive ("\n" literal))
(loop)
}
])
(function main [
((chan channel-address) <- new-channel (3 literal))
; create two background 'routines' that communicate by a channel
(fork (consumer fn) (chan channel-address))
(fork (producer fn) (chan channel-address))
(sleep (2000 literal)) ; wait for forked routines to effect the transfer
])
|