Re: dereferencing problem

From	glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups	comp.lang.c
Subject	Re: dereferencing problem
Date	2014-04-14 06:50 +0000
Organization	Aioe.org NNTP Server
Message-ID	<lig0g2$hji$1@speranza.aioe.org> (permalink)
References	(1 earlier) <licf4i$svt$1@dont-email.me> <pa-20140413004448@ram.dialup.fu-berlin.de> <licgaq$4k8$1@dont-email.me> <lichga$o4k$1@speranza.aioe.org> <liftrm$pgs$1@dont-email.me>

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Les Cargill <lcargill99@comcast.com> wrote:

(snip, I wrote)
>> Syntax is right. That declares pa as a pointer, but doesn't
>> point it to anything.

>> One way is to have a struct addrinfo, and use &.

>> struct addrinfo a;
>> struct addrinfo *pa=&a;
>> (or assign it on another line)

>> Since addrinfo is small, that is probably the best way,
>> but some will malloc() it.

> Or declare it static. We're in main ( not that it really
> matters ) .

Well, they could be different. auto should be allocated on the
stack, though it will stay there the whole time (until main
returns). 

Also, some systems have unusual restrictions on static storage.
Some years ago in an Alpha/OSF1 system with 16GB RAM, I tried 
to allocate and initialize a 100k byte static array. 

That was too big.

I think I just made it smaller, but maybe auto instead.

-- glen

Thread

dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 18:13 -0400
  Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 18:36 -0400
    Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 18:56 -0400
      Re: dereferencing problem glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-04-12 23:16 +0000
        Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 19:52 -0400
        Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 19:57 -0400
          Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 01:00 -0700
        Re: dereferencing problem Les Cargill <lcargill99@comcast.com> - 2014-04-14 01:10 -0500
          Re: dereferencing problem glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-04-14 06:50 +0000
            Re: dereferencing problem Les Cargill <lcargill99@comcast.com> - 2014-04-14 07:42 -0500
            Re: dereferencing problem "Charles Richmond" <numerist@aquaporin4.com> - 2014-04-14 14:36 -0500
              Re: dereferencing problem glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-04-14 20:10 +0000
    Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-12 16:50 -0700
      Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 20:12 -0400
        Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 20:30 -0400
          Re: dereferencing problem Richard Damon <Richard@Damon-Family.org> - 2014-04-12 20:39 -0400
            Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 21:01 -0400
              Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 13:02 +1200
          Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 12:53 +1200
          Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 20:58 -0400
            Re: dereferencing problem Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2014-04-12 21:04 -0400
          Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 01:13 -0700
            Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-13 12:54 -0400
              Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 14:14 -0700
        Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 01:12 -0700
          Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-13 12:57 -0400
            Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 14:22 -0700
            Re: dereferencing problem glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-04-13 22:18 +0000
    Re: dereferencing problem Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2014-04-12 21:02 -0400
      Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 13:03 +1200
        Re: dereferencing problem Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2014-04-12 21:07 -0400
      Re: dereferencing problem glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-04-13 01:18 +0000
        Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 13:19 +1200
      Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-12 21:25 -0400
        Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 13:30 +1200
        Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 01:18 -0700
          Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-13 12:50 -0400
            Re: dereferencing problem Barry Schwarz <schwarzb@dqel.com> - 2014-04-13 14:24 -0700
              Re: dereferencing problem "Osmium" <r124c4u102@comcast.net> - 2014-04-13 18:48 -0500
              Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-14 14:46 -0400
                Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-14 15:58 -0400
                Re: dereferencing problem "Bill Cunningham" <nospam@nspam.invalid> - 2014-04-14 16:08 -0400
        Re: dereferencing problem Herbert Rosenau <os2guy@pc-rosenau.de> - 2014-05-03 14:19 +0200
          Re: dereferencing problem "Bill Cunningaham" <nospam@nspam.invalid> - 2014-05-03 11:29 -0400
            Re: dereferencing problem "Bill Cunningaham" <nospam@nspam.invalid> - 2014-05-03 11:42 -0400
          Re: dereferencing problem Richard <rgrdev_@gmail.com> - 2014-05-03 21:15 +0200
  Re: dereferencing problem Ian Collins <ian-news@hotmail.com> - 2014-04-13 11:15 +1200

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