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Re: possible garbage collector problem...
- To: <tribble@son-of-blob>, <us@son-of-blob>
- Subject: Re: possible garbage collector problem...
- From: <eric@son-of-blob>
- Date: Sun, 1 Oct 89 10:01:27 PDT
>From tribble Sat Sep 30 17:58:37 1989
From: tribble (Eric Dean Tribble)
Subject: possible garbage collector problem...
...from Peter Deutsch. He called me this morning with a problem that he woke
up with - it seems our plan worked ;-)
what happens when the compiler automatically generates a temporary
pointer variable. f(g(x)) might turn into
TYPE foo = g(x);
If a garbage collection happened between the two statements, and foo
is not a StrongPointer, then the thing that foo points to might vanish
before or during the call to f(). My gut reaction is that this isn't
a problem, but I don't know enough to figure out why not.
We should consider paying Peter (c/o Alladin Enterprises) to actually
consult on GC when he returns. He's interested enough in the problem,
I think, and it'd be nice to ease him in :-) Also the last number I
heard from him was cheep: $100/hr in low quantities, less for more
(assuming he had the time). I suspect his trade for this is that he's
Garbage collecting between pieces of a single expression isn't a problem
as long as we are single threaded. We'll clearly have to be cleverer about
it when we go to multiple threads. I don't have an obvious solution in mind
right now though.
- e -