File size: 3,644 Bytes
e36aeda | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | // Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"iter"
"runtime"
)
func init() {
register("CoroLockOSThreadIterLock", func() {
println("expect: OK")
CoroLockOSThread(callerExhaust, iterLock)
})
register("CoroLockOSThreadIterLockYield", func() {
println("expect: OS thread locking must match")
CoroLockOSThread(callerExhaust, iterLockYield)
})
register("CoroLockOSThreadLock", func() {
println("expect: OK")
CoroLockOSThread(callerExhaustLocked, iterSimple)
})
register("CoroLockOSThreadLockIterNested", func() {
println("expect: OK")
CoroLockOSThread(callerExhaustLocked, iterNested)
})
register("CoroLockOSThreadLockIterLock", func() {
println("expect: OK")
CoroLockOSThread(callerExhaustLocked, iterLock)
})
register("CoroLockOSThreadLockIterLockYield", func() {
println("expect: OS thread locking must match")
CoroLockOSThread(callerExhaustLocked, iterLockYield)
})
register("CoroLockOSThreadLockIterYieldNewG", func() {
println("expect: OS thread locking must match")
CoroLockOSThread(callerExhaustLocked, iterYieldNewG)
})
register("CoroLockOSThreadLockAfterPull", func() {
println("expect: OS thread locking must match")
CoroLockOSThread(callerLockAfterPull, iterSimple)
})
register("CoroLockOSThreadStopLocked", func() {
println("expect: OK")
CoroLockOSThread(callerStopLocked, iterSimple)
})
register("CoroLockOSThreadStopLockedIterNested", func() {
println("expect: OK")
CoroLockOSThread(callerStopLocked, iterNested)
})
}
func CoroLockOSThread(driver func(iter.Seq[int]) error, seq iter.Seq[int]) {
if err := driver(seq); err != nil {
println("error:", err.Error())
return
}
println("OK")
}
func callerExhaust(i iter.Seq[int]) error {
next, _ := iter.Pull(i)
for {
v, ok := next()
if !ok {
break
}
if v != 5 {
return fmt.Errorf("bad iterator: wanted value %d, got %d", 5, v)
}
}
return nil
}
func callerExhaustLocked(i iter.Seq[int]) error {
runtime.LockOSThread()
next, _ := iter.Pull(i)
for {
v, ok := next()
if !ok {
break
}
if v != 5 {
return fmt.Errorf("bad iterator: wanted value %d, got %d", 5, v)
}
}
runtime.UnlockOSThread()
return nil
}
func callerLockAfterPull(i iter.Seq[int]) error {
n := 0
next, _ := iter.Pull(i)
for {
runtime.LockOSThread()
n++
v, ok := next()
if !ok {
break
}
if v != 5 {
return fmt.Errorf("bad iterator: wanted value %d, got %d", 5, v)
}
}
for range n {
runtime.UnlockOSThread()
}
return nil
}
func callerStopLocked(i iter.Seq[int]) error {
runtime.LockOSThread()
next, stop := iter.Pull(i)
v, _ := next()
stop()
if v != 5 {
return fmt.Errorf("bad iterator: wanted value %d, got %d", 5, v)
}
runtime.UnlockOSThread()
return nil
}
func iterSimple(yield func(int) bool) {
for range 3 {
if !yield(5) {
return
}
}
}
func iterNested(yield func(int) bool) {
next, stop := iter.Pull(iterSimple)
for {
v, ok := next()
if ok {
if !yield(v) {
stop()
}
} else {
return
}
}
}
func iterLock(yield func(int) bool) {
for range 3 {
runtime.LockOSThread()
runtime.UnlockOSThread()
if !yield(5) {
return
}
}
}
func iterLockYield(yield func(int) bool) {
for range 3 {
runtime.LockOSThread()
ok := yield(5)
runtime.UnlockOSThread()
if !ok {
return
}
}
}
func iterYieldNewG(yield func(int) bool) {
for range 3 {
done := make(chan struct{})
var ok bool
go func() {
ok = yield(5)
done <- struct{}{}
}()
<-done
if !ok {
return
}
}
}
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