synchronized (this[.classinfo]) in druntime and phobos

Andrei Alexandrescu SeeWebsiteForEmail at erdani.org
Thu May 31 11:29:52 PDT 2012


On 5/31/12 7:49 AM, Dmitry Olshansky wrote:
>>>
>>> But this is a protection/visibility issue, which is orthogonal on the
>>> locking capability. It's as if you say "int is not good because anyone
>>> can overflow it." Okay! Make it private inside a CheckedInt class.
>>
>> Sorry, that's a bad comparison. CheckedInt is to int, what CheckedMutex
>> is to mutex - but I'm not suggesting anything like a CheckedMutex. I'm
>> suggesting "mutex" but kept private inside the class /that it locks/.
>> Yes, it's a visibility issue, the issue is that the mutex used by
>> synchronized classes/methods is too visible/accessible and this opens it
>> up for deadlocks which are otherwise impossible.
>>
>
> Sure it's awful comparison.

It's a great comparison.

Andrei



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