Re: Is the Prolog runtime re-entrantable in Prolog --> C --> Prolog procedure?

[Daniel Diaz]

Hi,

sorry for the late reply. There are possibly reentrancy issues with gprolog. However, your example is too complex as is to be used for debugging purpose. Could you minimize it as most as possible so I could try to understand what happens ?

Thank you

Daniel

Le 24 juil. 2014 à 20:24, Shuai Wang <address@hidden> a écrit :

Hello prolog users,

I just asked a question in this email list about 

"why failed in process of Prolog call C call Prolog"

Now after several test, I have a more general question which confused 

me...

I myself have some experience about using C call Prolog and 

using Prolog to call C in GNU-Prolog, however, I have several 

strange problems in recent test of procedure below:

     C -- call -- > Prolog -- call --> C -- call --> Prolog 

     -- return --> C -- return --> Prolog (fail..)

So basically, is the Prolog runtime reentrantable in Prolog --> C --> Prolog

procedure..?

I attached my test code in the email, in this code, the weird thing is that return value of TMP  in  Prolog function foo  can not be binded.

BTW:  Is it something related to the arguments of 

Pl_Query_Begin; Pl_Query_End ?

Best,

Shuai

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