blob: 17b2b0e3a0bca1a18aa8dfee6964ca9f131f2003 (
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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
package main
import (
"runtime"
"sync"
"time"
)
func main() {
println("main 1")
go sub()
time.Sleep(1 * time.Millisecond)
println("main 2")
time.Sleep(2 * time.Millisecond)
println("main 3")
// Await a blocking call. This must create a new coroutine.
println("wait:")
wait()
println("end waiting")
value := delayedValue()
println("value produced after some time:", value)
// Run a non-blocking call in a goroutine. This should be turned into a
// regular call, so should be equivalent to calling nowait() without 'go'
// prefix.
go nowait()
time.Sleep(time.Millisecond)
println("done with non-blocking goroutine")
var printer Printer
printer = &myPrinter{}
printer.Print()
sleepFuncValue(func(x int) {
time.Sleep(1 * time.Millisecond)
println("slept inside func pointer", x)
})
time.Sleep(1 * time.Millisecond)
n := 20
sleepFuncValue(func(x int) {
time.Sleep(1 * time.Millisecond)
println("slept inside closure, with value:", n, x)
})
time.Sleep(2 * time.Millisecond)
var x int
go func() {
time.Sleep(2 * time.Millisecond)
x = 1
}()
time.Sleep(time.Second / 2)
println("closure go call result:", x)
time.Sleep(2 * time.Millisecond)
var m sync.Mutex
m.Lock()
println("pre-acquired mutex")
go acquire(&m)
time.Sleep(2 * time.Millisecond)
println("releasing mutex")
m.Unlock()
time.Sleep(2 * time.Millisecond)
m.Lock()
println("re-acquired mutex")
m.Unlock()
println("done")
startSimpleFunc(emptyFunc)
time.Sleep(2 * time.Millisecond)
testCond()
}
func acquire(m *sync.Mutex) {
m.Lock()
println("acquired mutex from goroutine")
time.Sleep(2 * time.Millisecond)
m.Unlock()
println("released mutex from goroutine")
}
func sub() {
println("sub 1")
time.Sleep(2 * time.Millisecond)
println("sub 2")
}
func wait() {
println(" wait start")
time.Sleep(time.Millisecond)
println(" wait end")
}
func delayedValue() int {
time.Sleep(time.Millisecond)
return 42
}
func sleepFuncValue(fn func(int)) {
go fn(8)
}
func startSimpleFunc(fn simpleFunc) {
// Test that named function types don't crash the compiler.
go fn()
}
func nowait() {
println("non-blocking goroutine")
}
type Printer interface {
Print()
}
type myPrinter struct {
}
func (i *myPrinter) Print() {
time.Sleep(time.Millisecond)
println("async interface method call")
}
type simpleFunc func()
func emptyFunc() {
}
func testCond() {
var cond runtime.Cond
go func() {
// Wait for the caller to wait on the cond.
time.Sleep(time.Millisecond)
// Notify the caller.
ok := cond.Notify()
if !ok {
panic("notification not sent")
}
// This notification will be buffered inside the cond.
ok = cond.Notify()
if !ok {
panic("notification not queued")
}
// This notification should fail, since there is already one buffered.
ok = cond.Notify()
if ok {
panic("notification double-sent")
}
}()
// Verify that the cond has no pending notifications.
ok := cond.Poll()
if ok {
panic("unexpected early notification")
}
// Wait for the goroutine spawned earlier to send a notification.
cond.Wait()
// The goroutine should have also queued a notification in the cond.
ok = cond.Poll()
if !ok {
panic("missing queued notification")
}
}
|
