* T L <tapir....@gmail.com> [170710 12:35]:
> so this is guaranteed by Go memory model?
>
> package main
>
> import "fmt"
> import "sync/atomic"
> import "unsafe"
>
> func main() {
> var x, y int32
>
> var p = unsafe.Pointer(&x)
>
> atomic.AddInt32(&x, 1)
> atomic.AddInt32(&y, 1)
>
> if atomic.LoadInt32(&y) == 1 {
> fmt.Println("x =", *(*int32)(p)) // always 1 if it is printed?
> }
> }
Again, no concurrency. Order is as written.
I've only used unsafe.Pointer once and in a way that was specifically
documented to work, and I have not otherwise researched it, so I may be
wrong here, but assuming the GC is guaranteed to update p if x moves,
then I believe this will always print "x = 1".
...Marvin
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