[fpc-devel] Improving Ref Counting

[Olle Raab]

05-02-27 13.47, skrev Uberto Barbini följande:

>> A GC needs to trace an object's references to see if anything still
>> points to it. How else can it decide whether an object is no longer in use?
> 
> Yes, this is right, but it hasn't to decide if reference are valid or invalid.
> Moreover also the simpliest GC techniques (mark'n'swift) are quite slow and
> are usually running in a low priority thread in background.

Afaik the simplest GC's need to have exclusive access to the heap and stack,
so it cant be run in parallell with ordinary processing.

Olle