On Sun, Mar 8, 2009 at 12:34 PM, Peter Bex peter@xs4all.nl wrote:
On Sun, Mar 08, 2009 at 12:10:39AM +0100, felix winkelmann wrote:
Ok, here is what Marc Feeley, the author of SRFI-18 has to say
about this:
snip
Hope that clarifies things.
Hope that clarifies things.
Yup, thanks
On Mon, Mar 2, 2009 at 3:48 PM, Peter Bex peter@xs4all.nl wrote:
However, it turns out that an exception thrown in a thread simply
terminates the thread instead of unwinding the stack. The same does not
happen in the primordial thread:
$ csi
#;2 (dynamic-wind (lambda () (print BEFORE))
On Tue, Mar 10, 2009 at 04:43:00PM -0500, Jim Ursetto wrote:
Hi Peter. You might disagree with the rationale, but the behavior is
in fact consistent--your example only happens to work at the REPL.
Jim, thanks for that explanation. It cleared up a lot!
Cheers,
Peter
--
http://sjamaan.ath.cx
John Cowan wrote:
Tobia Conforto scripsit:
I wonder how other compilers do it. For example, I find Java's
(and Python's) try/finally syntax quite useful. I've always
thought dynamic-wind was Scheme's equivalent construct, but it
would appear I was mistaken.
Here's the relevant writeup
On Sun, Mar 8, 2009 at 12:34 PM, Peter Bex peter@xs4all.nl wrote:
Yup, thanks for asking him. It still sucks, though ;)
We are bound to the SRFI-18 spec, but you are free to invent your own API.
cheers,
felix
___
Chicken-users mailing list
Peter Bex wrote:
Yup, thanks for asking him. It still sucks, though ;)
This is yet another solution, in case you can't (or don't want to)
steal the exception handler from the primordial thread. This one may
be safer. But then again, I'm probably missing Marc Feeley's point
completely,
felix winkelmann wrote:
Ok, here is what Marc Feeley, the author of SRFI-18 has to say about
this:
when an uncaught exception occurs in a thread the thread is in bad
shape and things have gone sufficiently wrong that there is no
universally acceptable way to continue execution. Executing
Peter Bex wrote:
Yup, thanks for asking him. It still sucks, though ;)
It does. This is one way to solve it:
#;1 (use srfi-18)
; loading library srfi-18 ...
#;2 (define exception-protect
--- (let ((original-exception-handler (current-exception-handler)))
--- (lambda (thunk)
---
Tobia Conforto scripsit:
I wonder how other compilers do it. For example, I find Java's (and
Python's) try/finally syntax quite useful. I've always thought
dynamic-wind was Scheme's equivalent construct, but it would appear I
was mistaken.
Here's the relevant writeup from Taylor
On Sun, Mar 08, 2009 at 12:10:39AM +0100, felix winkelmann wrote:
Ok, here is what Marc Feeley, the author of SRFI-18 has to say
about this:
snip
Hope that clarifies things.
Hope that clarifies things.
Yup, thanks for asking him. It still sucks, though ;)
Cheers,
Peter
--
On Mon, Mar 2, 2009 at 9:48 PM, Peter Bex peter@xs4all.nl wrote:
However, it turns out that an exception thrown in a thread simply
terminates the thread instead of unwinding the stack. The same does not
happen in the primordial thread:
Ok, here is what Marc Feeley, the author of SRFI-18
Hi,
I just got bitten by this problem:
http://lists.gnu.org/archive/html/chicken-users/2008-04/msg00023.html
I'm increasing and decreasing a mutex value based on how many threads
are doing some work. When they stop working, the mutex is decreased
and when they start, the mutex is increased. I
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