l...@gnu.org (Ludovic Courtès) writes:
Andy Wingo wi...@pobox.com skribis:
But OK, the question here is, what if another thread is concurrently
mutating X and Y? If this were C++ or Java, the answer would be that
they can still fold, because access to a multithreaded mutable needs to
be
Andy Wingo wi...@pobox.com writes:
But OK, the question here is, what if another thread is concurrently
mutating X and Y? If this were C++ or Java, the answer would be that
they can still fold, because access to a multithreaded mutable needs
to be synchronized. I think this is reasonable.
Hi,
Andy Wingo wi...@pobox.com skribis:
But OK, the question here is, what if another thread is concurrently
mutating X and Y? If this were C++ or Java, the answer would be that
they can still fold, because access to a multithreaded mutable needs to
be synchronized. I think this is
Hi,
On Fri 13 Apr 2012 10:07, Mark H Weaver m...@netris.org writes:
Nonetheless, the vtable checks involve comparisons with a mutable
top-level variable. Whenever unknown code is run (e.g. when a top-level
procedure is called) you must assume the worst: that any top-level
variable might
Hi Andy,
commit 59c557056cff1ce6146b4d689922300b6278
Author: Andy Wingo wingo-e+axbwqsrlaavxtiumw...@public.gmane.org
Date: Tue Apr 10 15:56:23 2012 -0700
peval: elide redundant predicates; eliminate some common subexpressions
* module/language/tree-il/peval.scm
At first I thought you were right. But then I realized there's an even
deeper problem here. Imagine implementing a record mutator like this:
(define (set-foo-a! foo new-value)
(if (is-foo? foo)
(%unsafe-set-foo-a! foo new-value)
(error)))
That code is incorrect, by the same logic you
Hi,
On Fri 13 Apr 2012 07:22, Mark H Weaver m...@netris.org writes:
* module/language/tree-il/peval.scm (fold-constants): Returns #f instead
of the expression, as all continuations handle #f themselves.
(negate, bailout?, extract-facts, infer, infer-defined?)
Hi Andy,
Andy Wingo wi...@pobox.com writes:
On Fri 13 Apr 2012 07:22, Mark H Weaver m...@netris.org writes:
* module/language/tree-il/peval.scm (fold-constants): Returns #f instead
of the expression, as all continuations handle #f themselves.
(negate, bailout?, extract-facts,
Noah Lavine noah.b.lav...@gmail.com skribis:
I'm somewhat afraid, however, that the real solution is changing how
we deal with parallelism, and that is a much bigger problem.
And this is where functional setters come in. ;-)
Ludo’.
On Fri, Apr 13, 2012 at 3:59 PM, Ludovic Courtès l...@gnu.org wrote:
Noah Lavine noah.b.lav...@gmail.com skribis:
I'm somewhat afraid, however, that the real solution is changing how
we deal with parallelism, and that is a much bigger problem.
And this is where functional setters come in.
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