Re: help on building clisp

Hi,

Thanks for the info.
As Sam and you both mentioned I am reading the code and documentation in
"hashtable.d" file.

> Hash tables are used in both lisp and c code - to get an impression do
> simple grep for: make-hash-table (and make_hash_table), gethash, etc.
> I would recommend you to get common with clisp internals -
> http://clisp.org/impnotes/internals.html is a good start.

I searched for make-hash-table and gethash and basically *hash* inside the
project folder and I found numerous references to them.
It is scary, I believe this is due to Clos using hash tables internally.
Clisp internals look like a good place to start.

I have a few question to ask:
1. How does the program interact with lisp and c while building it?
2. What is NOT thread-safe in CLisp? vs what is thread-safe in clisp?
3. Is there a list of things that is known to be threadsafe ?
4. The project page<http://www.gnu.org/software/soc-projects/ideas-2014.html>says
"Finish a multi-threading interface", so what all things am I looking
into working with?
    Is it just how clisp is built or is it also related to the internal
workings of clisp.
5. Should I brush up my lisp? since i guess I will need to work with lisp
code.

I think some of my questions will be answered as I get familiar with clisp
internals <http://clisp.org/impnotes/internals.html>.
All in all, can you guys narrow me down as to what I will be working on?
This will help me form a better idea of hashtable and its usage in clisp,
and how a lockfree version will benefit the software.
It is necessary that I understand the concept.

Thanks in advance



On Wed, Mar 12, 2014 at 2:06 AM, Vladimir Tzankov <[email protected]>wrote:

> Hey Shashank,
> Thanks for interest in clisp.
> > $ ./configure --with-threads=POSIX_THREADS
>
> This is the normal way to configure clisp with threads.
>
> > Later, the execution of `make` and `make check` commands also occurs
> > successfully (with huge amount of execution steps being flushed out on
> the
> > terminal).
>
> `make` should build successfully clisp.
> `make check` usually segfaults in multi thread builds (you were lucky)
> mostly due to non thread safe hash tables.
>
> > Can you guide me as to how I shall proceed in this regard. Also, how and
> > where the CLISP hash table implementation is used, which in turn should
> be
> > replaced by a lock-free implementation.
>
> The hash table implementation is located in src/hashtabl.d. Hash
> tables are used in both lisp and c code - to get an impression do
> simple grep for: make-hash-table (and make_hash_table), gethash, etc.
> I would recommend you to get common with clisp internals -
> http://clisp.org/impnotes/internals.html is a good start.
>
> Vlad
>

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