79 lines
1.0 KiB
Go
79 lines
1.0 KiB
Go
package main
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import (
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"sync/atomic"
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"time"
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)
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/* We use int32 as atomic bools
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* (since booleans are not natively supported by sync/atomic)
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*/
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const (
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AtomicFalse = int32(iota)
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AtomicTrue
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)
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type AtomicBool struct {
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flag int32
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}
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func (a *AtomicBool) Get() bool {
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return atomic.LoadInt32(&a.flag) == AtomicTrue
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}
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func (a *AtomicBool) Set(val bool) {
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flag := AtomicFalse
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if val {
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flag = AtomicTrue
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}
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atomic.StoreInt32(&a.flag, flag)
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}
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func toInt32(n uint32) int32 {
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mask := uint32(1 << 31)
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return int32(-(n & mask) + (n & ^mask))
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}
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func min(a uint, b uint) uint {
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if a > b {
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return b
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}
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return a
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}
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func minUint64(a uint64, b uint64) uint64 {
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if a > b {
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return b
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}
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return a
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}
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func signalSend(c chan struct{}) {
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select {
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case c <- struct{}{}:
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default:
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}
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}
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func signalClear(c chan struct{}) {
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select {
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case <-c:
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default:
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}
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}
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func timerStop(timer *time.Timer) {
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if !timer.Stop() {
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select {
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case <-timer.C:
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default:
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}
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}
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}
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func NewStoppedTimer() *time.Timer {
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timer := time.NewTimer(time.Hour)
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timerStop(timer)
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return timer
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}
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