On Tue, Dec 3, 2019 at 5:21 PM Liam Breck <networkimp...@gmail.com> wrote:
>
> I have a problem that is trivially solved via
>
> door sync.RWMutex
>
> func Reader() T {
> if !door.TryRLock() { // missing in stdlib :-(
> return busy
> }
> defer door.RUnlock()
> ...
> }
>
> func Writer() {
> door.Lock()
> defer door.Unlock()
> ...
> }
>
> How does one achieve this in Go?
Two locks and a bool?
var door=sync.Mutex{}
var x=sync.Mutex{}
var b bool
func trylock() bool {
x.Lock()
if b {
x.Unlock()
return false
}
b=true
door.Lock()
x.Unlock()
return true
}
unlock:
x.Lock()
b=false
door.Unlock()
x.Unlock()
>
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