syncthing/model/util.go

// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
// All rights reserved. Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.

package model

import (
	"sync"
	"time"
)

func deadlockDetect(mut sync.Locker, timeout time.Duration) {
	go func() {
		for {
			time.Sleep(timeout / 4)
			ok := make(chan bool, 2)

			go func() {
				mut.Lock()
				mut.Unlock()
				ok <- true
			}()

			go func() {
				time.Sleep(timeout)
				ok <- false
			}()

			if r := <-ok; !r {
				panic("deadlock detected")
			}
		}
	}()
}