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> On Thu, Jul 15, 2010 at 6:43 PM, Andreas Raab <
andreas.raab@gmx.de> wrote:
>>
>> On 7/15/2010 5:40 AM, Mariano Martinez Peck wrote:
>>>
>>> Hi folks. I need to know the objects (actually, only how many) that are
>>> pointing to any object. So...I take an object X, and I want to know how
>>> many objects are pointing to X.
>>>
>>> The only possible I see in Squeak VM is to do a full mark over all
>>> objects in memory (or starting by the roots). This is time consuming and
>>> I even need (maybe) to do this check (to know how many objects are
>>> pointing to an object) for every single object.
>>>
>>> So...is there a faster solution for this? The only thing I can imagine
>>> is to modify the object header, maybe create a new type, and add an
>>> array with the addresses of the objects that are pointing to that
>>> object. Or maybe just a counter that I can increase or decrease ?
>>
>> That's called "reference counting". It's not supported in Squeak.
>>
>> Cheers,
>> - Andreas
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