On Saturday, October 21, 2017 at 6:38:29 PM UTC-4, Dave Cheney wrote: > > no to your first example, yes to the second. >
Thanks. Yes, the second is really mentioned in the Lock section in https://golang.org/ref/mem BTW, I can't find the context for the *n* and *m* *(n < m) *in this section. What do them mean? > > On Sunday, 22 October 2017 08:01:08 UTC+11, T L wrote: >> >> package main >> >> import "fmt" >> import "sync" >> import "sync/atomic" >> >> func main() { >> var a, b int32 = 0, 0 >> >> go func() { >> a = 1 >> atomic.AddInt32(&b, 1) >> }() >> >> for { >> if n := atomic.LoadInt32(&b); n == 1 { >> fmt.Println(a) // always print 1? >> break >> } >> } >> >> //====================== >> >> var x, y int32 = 0, 0 >> var m sync.Mutex >> >> go func() { >> x = 1 >> m.Lock() >> y++ >> m.Unlock() >> }() >> >> for { >> m.Lock() >> n := y >> m.Unlock() >> if n == 1 { >> fmt.Println(x) // always print 1? >> break >> } >> } >> } >> > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
