Re: temporary files under win32

[Karim Belabas <Karim.Belabas@math.u-bordeaux1.fr>]

* Loïc Grenié [2012-10-18 14:16]:
> 2012/10/18 Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>:
>> I get report that PARI support for temporary files on win32 is not reliable.
>> In particular when running several instance of GP running factorisation.
>>
>> I would be glad if someone could review this code
>> (in src/language/es.c)
>>
>> To debug under gp, do
>> \gf2
>> factorint(2^251-1,14)
> 
>     It should work without problem under cygwin.
> 
>     Under win32, the problem is that all temporary files have the
>   same name.

They shouldn't. In pari_unique_dir(), the final get_file() test ensures
that we at least try 26^2 names [ by replacing the last two letters in
filename by aa -> zz ].

>   It sounds possible to use the same system as
>   UNIX, creating in  src/systems/win32/win32.c
> 
>   - pid_t getpid(void)
>   which would return the pid of the process, using
>   GetCurrentProcessId.
> 
>   - uid_t getuid(void)
>   which would return some hash of the user name (using
>   GetUserName).

That's a good idea, at least for getpid(); maybe multi-user Windows
systems are so infrequent that we needn't bother about getuid ?

Would you be willing to get a shot at this ?

Thanks !

    K.B.
-- 
Karim Belabas, IMB (UMR 5251)  Tel: (+33) (0)5 40 00 26 17
Universite Bordeaux 1          Fax: (+33) (0)5 40 00 69 50
351, cours de la Liberation    http://www.math.u-bordeaux1.fr/~belabas/
F-33405 Talence (France)       http://pari.math.u-bordeaux1.fr/  [PARI/GP]
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