Re: Adding garbage collection to C++

bill@amber.ssd.csd.harris.com (Bill Leonard) writes:


>[How do you garbage collect multi-threaded programs where some pointers to
>shared memory are kept in per-thread private storage]


> I think you basically have to give up on garbage collecting such strange
> objects. But their existence forces me to advocate that garbage
> collection only happen if I specifically ask for it (thus begging for
> language extensions), rather than automatically.


You don't need a language extension, nor do you need "garbage
collection only [to] happen if [you] specifically ask for it". Simply
retain a pointer to the object in the address space of A. In fact, you
can encapsulate this behavior nicely inside your "send" procedure.


Thomas.
[So how do you ever collect storage that's ever been shared between two
threads? In fairness, this isn't unique to C -- it'd be a problem in any
situation where you have a shared heap with unshared pointers. -John]
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