On 02 December 2005 12:11, Tomasz Zielonka wrote:
On Fri, Dec 02, 2005 at 11:20:54AM -, Simon Marlow wrote:
If anyone is interested, this turned out to be a bug in the
Network.BSD module, namely that getHostByName isn't thread safe
because it is based on the C library function
On Fri, Dec 02, 2005 at 12:39:25PM -, Simon Marlow wrote:
Do I understand correctly that another workaround is
- don't compile your programs with -threaded
?
No, the bug isn't related to -threaded. It still occurs without
-threaded.
Let's check that now I understand - so the
On 02 December 2005 12:49, Tomasz Zielonka wrote:
On Fri, Dec 02, 2005 at 12:39:25PM -, Simon Marlow wrote:
Do I understand correctly that another workaround is
- don't compile your programs with -threaded
?
No, the bug isn't related to -threaded. It still occurs without
On 02 December 2005 12:25, Joel Reymont wrote:
I thought that if -threaded is not used then all the blocking IO is
assigned a separate OS thread.
No - the runtime is completely single-threaded without -threaded.
Blocking I/O is managed by the runtime. With -threaded, blocking I/O is
managed
Simon,
On Dec 2, 2005, at 1:16 PM, Simon Marlow wrote:
No - the runtime is completely single-threaded without -threaded.
Blocking I/O is managed by the runtime. With -threaded, blocking I/
O is
managed by a Haskell thread. The programmer shouldn't see any
difference in the behaviour of
Am Dienstag, 29. November 2005 16:16 schrieb Sebastian Sylvan:
IIRC Haskell assumes a tab is 8 spaces.
Correctly, it is explicitly specified in the Haskell spec, see:
http://haskell.org/onlinereport/syntax-iso.html#layout
IMO that's way too much. Haskell tends to take up quite a bit of
Simon,
You told me a bit about how to examine the Haskell stack by looking
at R22 on the PowerPC and $ebx on Intel architectures. I looked at
your .gdbinit but could not figure out which macros are to be used.
The example below is a bit contrived in that I'm freeing the SSL
context
On 02 December 2005 14:03, Joel Reymont wrote:
You told me a bit about how to examine the Haskell stack by looking
at R22 on the PowerPC and $ebx on Intel architectures. I looked at
your .gdbinit but could not figure out which macros are to be used.
The example below is a bit contrived in
On 02 December 2005 13:32, Joel Reymont wrote:
I was going on this quote by Simon PJ:
--
It should be find to have lots of threads, esp if most of them are
asleep. The only thing to watch out for is that GHC's runtime system
will consume one *OS* thread for each *blocked* foreign call.
On Dec 2, 2005, at 2:08 PM, Simon Marlow wrote:
It looks like your crash happened in the SSL library, and you have a
useful stack trace there.
This is contrived in that I already know where the error is and it
clearly points to SSL_free. I'm trying to figure out how I would have
gotten
On 02 December 2005 14:17, Joel Reymont wrote:
On Dec 2, 2005, at 2:08 PM, Simon Marlow wrote:
It looks like your crash happened in the SSL library, and you have a
useful stack trace there.
This is contrived in that I already know where the error is and it
clearly points to SSL_free. I'm
raptor [EMAIL PROTECTED] writes,
]- that is the problem :), 'cause such functions should accept Char and
String, but return a Tuple of Strings, but it is recursive (so that it fetch
next,next,next char :)) i.e. it is own consumer and should return String
--this is wrong, just tring grab char
Thank you Simon! This is very helpful and will take me a while to
digest.
On Dec 2, 2005, at 2:43 PM, Simon Marlow wrote:
Ok, you want a crash course in reading the Haskell stack.
Each xxx_info symbol is a return address. The other values are the
contents of stack frames: values saved for
Folks,
After two months with Haskell I think I'm starting to get the proper
spirit. Inspired by Simon PJ's recent comments about lots of threads
not hurting Haskell I introduced STM into my network client. I would
like to run my architecture by you to see if there are any
improvements to
Folks,
I'm trying to learn more about this exception. Would someone with a
subscription to ACM kindly send me this paper:
http://portal.acm.org/ft_gateway.cfm?id=507655type=pdf?
Thanks in advance, Joel
--
http://wagerlabs.com/
___
I got a copy, thanks!
On Dec 2, 2005, at 6:47 PM, Greg Woodhouse wrote:
Did anyone ever send you a copy of this paper? I'm an ACM member, so I
could forward it to you if need be.
--
http://wagerlabs.com/
___
Haskell-Cafe mailing list
Hi,
I'm wondering about a syntactic sugar for comonads. These are still very
new to me, but it seems like their usage will become much more common
once manipulations are more convenient (I believe this was the case with
monads and arrows, correct?).
Here's an example for motivation. Consider
See: http://haskell.org/pipermail/haskell-cafe/2003-January/003794.html
The OI comonad as previously envisioned breaks referential
transparency. I/O just doesn't seem to be something which one can
easily do comonadically, since once coeval/extract is applied, you're
back to plain values, and
From: Cale Gibbard [mailto:[EMAIL PROTECTED]
See:
http://haskell.org/pipermail/haskell-cafe/2003-January/003794.html
The OI comonad as previously envisioned breaks referential
transparency. I/O just doesn't seem to be something which one
can easily do comonadically, since once
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