Hi,
On 14.01.2012, at 12:11, Serge D. Mechveliani wrote:
On Fri, Jan 13, 2012 at 12:19:34PM -0800, Donn Cave wrote:
Quoth Serge D. Mechveliani mech...@botik.ru,
...
Initially, I did the example by the Foreign Function Interface for C.
But then, I thought But this is unnatural! Use plainly
To my question about safety of
toA_IO = openFd toA WriteOnly Nothing defaultFileFlags
fromA_IO = openFd fromA ReadOnly Nothing defaultFileFlags
toA = unsafePerformIO toA_IO
fromA = unsafePerformIO fromA_IO
axiomIO :: String - IO String
axiomIO str = do
fdWrite toA str
On Fri, Jan 13, 2012 at 12:19:34PM -0800, Donn Cave wrote:
Quoth Serge D. Mechveliani mech...@botik.ru,
...
Initially, I did the example by the Foreign Function Interface for C.
But then, I thought But this is unnatural! Use plainly the standard
Haskell IO, it has everything.
So, your
Quoth Serge D. Mechveliani mech...@botik.ru,
By openFile you, probably, mean openFd.
Yes, sorry!
Another point is the number of open files, for a long loop.
...
toA_IO = openFd toA WriteOnly Nothing defaultFileFlags
...
When applying axiomIO in a loop of 9000 strings, it breaks:
On Sat, Jan 14, 2012 at 11:57, Donn Cave d...@avvanta.com wrote:
I don't know. When I was younger, I used to track these problems down
and try to explain in detail why buffered I/O is a bad bet with pipes,
sockets etc. I don't think anyone listened. I think I am going to
experiment with I
On Thu, Jan 12, 2012 at 7:53 PM, Serge D. Mechveliani mech...@botik.ru wrote:
People,
(I wonder: is this for beginn...@haskell.org ?)
I don't think so.
I need to organize a string interface for a Haskell function
Main.axiom and a C program
fifoFromA.c
via
On Fri, Jan 13, 2012 at 04:34:37PM +0100, Chadda?? Fouch?? wrote:
On Thu, Jan 12, 2012 at 7:53 PM, Serge D. Mechveliani mech...@botik.ru
wrote:
People,
(I wonder: is this for beginn...@haskell.org ?)
I don't think so.
I need to organize a string interface for a Haskell
On Fri, Jan 13, 2012 at 12:25, Serge D. Mechveliani mech...@botik.ruwrote:
On Fri, Jan 13, 2012 at 04:34:37PM +0100, Chadda?? Fouch?? wrote:
Now that seems interesting, but just to be clear : did you choose
this solution (and why won't you use the FFI instead) or is this just
to see how
Quoth Serge D. Mechveliani mech...@botik.ru,
[ ... why in Haskell instead of FFI ... ]
Because it is a direct and the simplest approach. Why does one need a
foreign language, if all the needed functions are in the standard
Haskell library?
The GHC Haskell library makes some compromises with
Brandon, can you elaborate? Are you talking about UNIX named pipes or
FIFO/queue data structures in general?
Mike Craig
On Fri, Jan 13, 2012 at 12:39 PM, Brandon Allbery allber...@gmail.comwrote:
On Fri, Jan 13, 2012 at 12:25, Serge D. Mechveliani mech...@botik.ruwrote:
On Fri, Jan 13,
I (Sergei) am invesigating (so far) only Unix named pipes.
I hope you are aware of the many gotchas involved with FIFOs.
There are very good reasons why they are not widely used.
At least in C - C, the Unix named pipes do work.
And I am trying to replace the first end with Haskell.
On
On Fri, Jan 13, 2012 at 10:08:04AM -0800, Donn Cave wrote:
Quoth Serge D. Mechveliani mech...@botik.ru,
[ ... why in Haskell instead of FFI ... ]
Because it is a direct and the simplest approach. Why does one need a
foreign language, if all the needed functions are in the standard
On Fri, Jan 13, 2012 at 13:23, Michael Craig mks...@gmail.com wrote:
Brandon, can you elaborate? Are you talking about UNIX named pipes or
FIFO/queue data structures in general?
I mean POSIX named pipes. They work, but they don't do what most people
think they do, and they're rather annoying
On Fri, Jan 13, 2012 at 04:34:37PM +0100, Chadda?? Fouch?? wrote:
On Thu, Jan 12, 2012 at 7:53 PM, Serge D. Mechveliani mech...@botik.ru
wrote:
[..]
I need to organize a string interface for a Haskell function
Main.axiom and a C program
fifoFromA.c
via
Quoth Serge D. Mechveliani mech...@botik.ru,
...
Initially, I did the example by the Foreign Function Interface for C.
But then, I thought But this is unnatural! Use plainly the standard
Haskell IO, it has everything.
So, your advice is return to FFI ?
Well, it turns out that the I/O system
People,
(I wonder: is this for beginn...@haskell.org ?)
I need to organize a string interface for a Haskell function
Main.axiom and a C program
fifoFromA.c
via a pair of named pipes (in Linux, UNIX).
The pipes are created before running, by the commands
On 01/12/2012 07:53 PM, Serge D. Mechveliani wrote:
[...]
For the to-A part writen in C (instead of Haskell), this interface
loop works all right.
With Haskell, I manage to process only a single string in the loop,
and then it ends with an error.
Main.hs is given below.
I never dealt
Quoth Serge D. Mechveliani mech...@botik.ru,
(I wonder: is this for beginn...@haskell.org ?)
No, not really! As already mentioned, the use of UnsafePerformIO
goes a little beyond what I think is its intended purpose, and I
think you might have better luck here with a test program that
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