[Info-vax] Looking into C-include files on VMS
Bill Gunshannon
billg999 at cs.uofs.edu
Wed Nov 4 03:38:11 EST 2009
In article <WELl3PK2e4nk at eisner.encompasserve.org>,
koehler at eisner.nospam.encompasserve.org (Bob Koehler) writes:
> In article <7ktlhfF3af5v3U13 at mid.individual.net>, Bob Eager <rde42 at spamcop.net> writes:
>>
>> Exactly. It 'costs' quite a bit more. Fair enough, but it means that a
>> proper port ought to consider those issues and not just do them 'the UNIX
>> way'.
>
> Yes, processes on VMS are heavier, and process creation costs more.
> Which is why in porting fork() stuff from UNIX I generally prefer
> to replace multiple forks with multiple POSIX threads. Only
> create a process if you need a new executable in it.
fork() is more than just creating a news process. It is not just
the overhead that make sit a show stopper on VMS. It is also things
like sharing all the variable and open files/devices. Unless things
have changed considerably since the last time I tried it VMS just
flat out can't do that.
bill
--
Bill Gunshannon | de-moc-ra-cy (di mok' ra see) n. Three wolves
billg999 at cs.scranton.edu | and a sheep voting on what's for dinner.
University of Scranton |
Scranton, Pennsylvania | #include <std.disclaimer.h>
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