53 lines
665 B
V
53 lines
665 B
V
import time
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struct St {
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mut:
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a int
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}
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fn f(shared x St, shared y St, shared z St) {
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for _ in 0 .. 101 {
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lock x, y {
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tmp := y.a
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y.a = x.a
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x.a = tmp
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}
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}
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lock z {
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z.a--
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}
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}
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fn test_shared_lock() {
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shared x := St{
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a: 5
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}
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shared y := &St{
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a: 7
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}
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shared z := St{
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a: 1
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}
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go f(shared x, shared y, shared z)
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for _ in 0 .. 100 {
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lock x, y {
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tmp := x.a
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x.a = y.a
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y.a = tmp
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}
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}
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// the following would be a good application for a channel
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for finished := false; true; {
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rlock z {
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finished = z.a == 0
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}
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if finished {
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break
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}
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time.sleep(100 * time.millisecond)
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}
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rlock x, y {
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assert x.a == 7 && y.a == 5
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}
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}
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