Re: multithreading

[Daniel Diaz]

Mihir,

Currently, GNU Prolog does not support multi-threading. We plan to implement 
POSIX threads in a near
future, it is in our TODO list... which will be published soon.

The functions Start_Prolog() and Stop_Prolog() shoud be called only once since 
Stop_Prolog does not
free allocated stacks (will be done in a next version). Try to use 
Reset_Prolog() (which reset all
Prolog stacks, but NOT dynamic predicates (thus asserted clauses remain after a 
Reset_Prolog). 

> Mihir Malviya wrote:
> 
> Hi,
>     Is the gprolog interface thread-safe? I seem to be having problems trying 
> to use it with the
> pthread library on Linux. I'm using gprolog-1.2.1 on a Linux box. The 
> particular problem that I
> face is that if I call Start_Prolog() in one thread and the other calls in a 
> second thread , the
> program gives a segmentation violation.
> The second problem that I face is that if I call Start_Prolog() , 
> Stop_Prolog() in a loop , the
> program dumps after 128 cycles...... , the problem aggravates in later 
> releases with the present
> gprolog-1.2.8 running only for 28 cycles.   Is there a memory leak ?
> Regards,
> Mihir.

-- 
Daniel Diaz   address@hidden
http://pauillac.inria.fr/~diaz
gprolog --version 2>&1 | sed -n -e 's/By //p'