blob: 0f1de58ea1a97de17501be74648c5c00050dfecb (
plain)
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
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
use std
use thread
use "util"
const Nwakes = 1000
var cv
var mtx
var val
var done : int32
var nwoken : int32
var nready : int32
var locked : int32
const main = {
done = 0
val = 123
mtx = thread.mkmtx()
cv = thread.mkcond(&mtx)
thread.spawn(cvwait)
thread.spawn(cvwake)
while done == 0
/* nothing */
;;
std.assert(nwoken == Nwakes, "wrong number of wakes")
std.assert(val == 123, "wrong val after all are done")
nwoken = 0
nready = 0
mkherd(100, cvwaitonce)
/* wait until the herd is ready */
while nready != 100 /* 0 to 99 */
/* nothing */
;;
while locked == 0
/* nothing */
;;
thread.condbroadcast(&cv)
while nwoken != 100
/* nothing */
;;
std.assert(nwoken == 100, "wrong thread count woken")
}
const cvwait = {
for var i = 0; i < Nwakes; i++
thread.mtxlock(&mtx)
thread.condwait(&cv)
std.assert(val == 456, "wrong val after signal\n")
val = 123
thread.mtxunlock(&mtx)
thread.xadd(&nwoken, 1)
;;
val = 123
thread.xadd(&done, 1)
}
const cvwake = {
while true
thread.mtxlock(&mtx)
val = 456
thread.mtxunlock(&mtx)
thread.condsignal(&cv)
if nwoken >= Nwakes
break
;;
;;
}
const cvwaitonce = {
thread.xadd(&nready, 1)
thread.mtxlock(&mtx)
thread.xadd(&locked, 1)
thread.condwait(&cv)
thread.mtxunlock(&mtx)
thread.xadd(&nwoken, 1)
}
|
