Re: initialization of local static variable

Message-ID	<4E920C76.9040203@loria.fr> (permalink)
Date	2011-10-09 23:04 +0200
From	Jens Gustedt <jens.gustedt@loria.fr>
Newsgroups	comp.lang.c
Subject	Re: initialization of local static variable
References	(9 earlier) <j6nn1h$al8$1@speranza.aioe.org> <9f9civF6foU1@mid.uni-berlin.de> <j6nv5f$tpq$1@speranza.aioe.org> <9f9ectFtu8U10@mid.individual.net> <j6o3d1$678$2@speranza.aioe.org>
Organization	Guest of ProXad - France

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Hi,

Am 10/08/2011 01:53 AM, schrieb jacob navia:
> Le 08/10/11 00:56, Ian Collins a écrit :
>>
>> In C++, file scope static variables are initialised before main is
>> called, so you could create a hidden function called on entry to main to
>> get the same effect.
>>
>> If you are adding C++ like extensions, checking and following the C++
>> rules would be a good idea. You would be gaining the benefit of the work
>> done for the C++ standard.
>>
> 
> Yes, you are right. I think that is a heavy argument in favor of doing
> it just once.

Another argument of doing it like C++ is that it really enhances the
semantics of static variables. The way you currently seem to have it can
be easily emulated in standard C. Just use a definition without
initialization that is followed by an assigment.

Having "once initialized" static variables are a real advantage if this
is guaranteed to be thread safe (in some former version of C++ that I
had to deal with it wasn't). And it also plays well if you declare the
variable "const".

Jens

Thread

initialization of local static variable "V.Subramanian, India" <subramanian100in@yahoo.com> - 2011-10-06 23:33 -0700
  Re: initialization of local static variable pete <pfiland@mindspring.com> - 2011-10-07 02:51 -0400
  Re: initialization of local static variable "BartC" <bc@freeuk.com> - 2011-10-07 10:44 +0100
  Re: initialization of local static variable China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-10-07 03:03 -0700
    Re: initialization of local static variable "BartC" <bc@freeuk.com> - 2011-10-07 11:33 +0100
      Re: initialization of local static variable jt@toerring.de (Jens Thoms Toerring) - 2011-10-07 11:11 +0000
        Re: initialization of local static variable "BartC" <bc@freeuk.com> - 2011-10-07 12:51 +0100
          Re: initialization of local static variable jt@toerring.de (Jens Thoms Toerring) - 2011-10-07 15:56 +0000
            Re: initialization of local static variable Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-10-07 20:29 +0100
              Re: initialization of local static variable jacob navia <jacob@spamsink.net> - 2011-10-07 21:38 +0200
                Re: initialization of local static variable Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-10-07 21:16 +0100
                Re: initialization of local static variable jacob navia <jacob@spamsink.net> - 2011-10-07 22:22 +0200
                Re: initialization of local static variable jt@toerring.de (Jens Thoms Toerring) - 2011-10-07 22:25 +0000
                Re: initialization of local static variable jacob navia <jacob@spamsink.net> - 2011-10-08 00:40 +0200
                Re: initialization of local static variable Ian Collins <ian-news@hotmail.com> - 2011-10-08 11:56 +1300
                Re: initialization of local static variable jacob navia <jacob@spamsink.net> - 2011-10-08 01:53 +0200
                Re: initialization of local static variable Jens Gustedt <jens.gustedt@loria.fr> - 2011-10-09 23:04 +0200
                Re: initialization of local static variable Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-10-10 11:54 -0500
                Re: initialization of local static variable Ike Naar <ike@sverige.freeshell.org> - 2011-10-10 17:41 +0000
                Re: initialization of local static variable Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-10-10 17:35 -0500
                Re: initialization of local static variable jt@toerring.de (Jens Thoms Toerring) - 2011-10-08 00:02 +0000
                Re: initialization of local static variable "BartC" <bc@freeuk.com> - 2011-10-08 01:26 +0100
                Re: initialization of local static variable "Philip Lantz" <prl@canterey.us> - 2011-10-08 03:01 -0700
                Re: initialization of local static variable "BartC" <bc@freeuk.com> - 2011-10-07 21:42 +0100
                Re: initialization of local static variable China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-10-07 16:25 -0700
                Re: initialization of local static variable jacob navia <jacob@spamsink.net> - 2011-10-08 01:51 +0200
                Re: initialization of local static variable China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-10-07 18:21 -0700
                Re: initialization of local static variable Nobody <nobody@nowhere.com> - 2011-10-08 15:36 +0100
                Re: initialization of local static variable Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-10-08 22:06 +0100
                Re: initialization of local static variable Nobody <nobody@nowhere.com> - 2011-10-09 05:35 +0100
                Re: initialization of local static variable Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-10-09 09:25 +0100
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-09 11:00 +0200
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-09 10:56 -0700
                Re: initialization of local static variable James Kuyper <jameskuyper@verizon.net> - 2011-10-09 14:30 -0400
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-09 21:43 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-10 19:08 +0200
                Re: initialization of local static variable Geoff <geoff@invalid.invalid> - 2011-10-10 16:16 -0700
                Re: initialization of local static variable Ike Naar <ike@iceland.freeshell.org> - 2011-10-10 23:22 +0000
                Re: initialization of local static variable James Kuyper <jameskuyper@verizon.net> - 2011-10-10 20:40 -0400
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-10 20:54 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-11 18:45 +0200
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-11 18:51 +0200
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-11 18:52 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-12 08:49 +0200
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-11 19:48 +0200
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-11 21:25 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-12 08:48 +0200
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-12 08:54 +0200
                Re: initialization of local static variable pete <pfiland@mindspring.com> - 2011-10-12 20:55 -0400
                Re: initialization of local static variable Barry Schwarz <schwarzb@dqel.com> - 2011-10-11 18:52 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-11 19:55 +0200
                Re: initialization of local static variable Keith Thompson <kst-u@mib.org> - 2011-10-11 11:24 -0700
                Re: initialization of local static variable Keith Thompson <kst-u@mib.org> - 2011-10-11 12:47 -0700
                Re: initialization of local static variable "io_x" <a@b.c.invalid> - 2011-10-12 08:49 +0200
            Re: initialization of local static variable Tim Rentsch <txr@alumni.caltech.edu> - 2012-01-24 16:09 -0800
          Re: initialization of local static variable China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-10-07 16:06 -0700
            Re: initialization of local static variable Seebs <usenet-nospam@seebs.net> - 2011-10-12 22:25 +0000
              Re: initialization of local static variable "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2011-10-13 07:09 -0700
                Re: initialization of local static variable Seebs <usenet-nospam@seebs.net> - 2011-10-17 17:21 +0000
              Re: initialization of local static variable Joe Wright <joewwright@comcast.net> - 2011-10-14 14:27 -0400
          Re: initialization of local static variable Richard Damon <news.x.richarddamon@xoxy.net> - 2011-10-08 00:03 -0400
            Re: initialization of local static variable China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-10-08 01:27 -0700
          Re: initialization of local static variable Richard Damon <news.x.richarddamon@xoxy.net> - 2011-10-08 00:08 -0400

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