I would use an atomic and a lock instead of two locks.
> On Dec 3, 2019, at 6:35 PM, burak serdar <bser...@computer.org> wrote:
>
> 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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