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Re: Macro for pthread_create()

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daniele.g <daniele@mother.nostromo.wy> wrote:
> Seebs <usenet-nospam@seebs.net> writes:

> > The obvious thing that leaps out at me is that you say you want
> >       pthread_create(&func_id, NULL, func, (void *) param)
> > but you wrote
> >       pthread_create(&func, NULL, func, (void *) param)
> >
> > Which makes me wonder whether you actually wanted the _id, and if so,
> > why you omitted it.  You may be looking for the "token pasting" operator,
> > ##.  See the comp.lang.c FAQ for more info on that.

> Yur're right, I wrote wrong the macro expansion.
> What I want is that when I compile this source under linux the macro is
> translated into the pthread_create(...) function, knowing that the macro
> has only two parameters. My problem is that I don't know how to create
> dinamically a func_id to be inserted into the macro definition.

If you never need to use the thread ID (i.e. what's returned via
the first argument) perhaps this is what you're looking for:

#define THREAD( func, parm ) \
    { pthread_t thread_id; \
      pthread_create( &thread_id, NULL, func, ( void * ) ( parm ) ); }

The curly braces are just there for restricting the life-time
of the 'thread_id' variable (it "goes out of scope" at the
closing '}').

But if you need the thread ID later on then I guess you will
have to explain in more detail what this is all about (or what
you exactly mean with "dynamically create a func_id").

                              Regards, Jens
-- 
  \   Jens Thoms Toerring  ___      jt@toerring.de
   \__________________________      http://toerring.de

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Thread

Macro for pthread_create() daniele@father.nostromo.wy (daniele.g) - 2012-01-10 19:21 +0100
  Re: Macro for pthread_create() jt@toerring.de (Jens Thoms Toerring) - 2012-01-10 19:02 +0000
    Re: Macro for pthread_create() jt@toerring.de (Jens Thoms Toerring) - 2012-01-10 20:18 +0000
      Re: Macro for pthread_create() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-01-10 20:29 +0000
        Re: Macro for pthread_create() jt@toerring.de (Jens Thoms Toerring) - 2012-01-10 21:03 +0000
  Re: Macro for pthread_create() James Kuyper <jameskuyper@verizon.net> - 2012-01-10 14:14 -0500
    Re: Macro for pthread_create() Seebs <usenet-nospam@seebs.net> - 2012-01-10 20:44 +0000
    Re: Macro for pthread_create() Anand Hariharan <mailto.anand.hariharan@gmail.com> - 2012-01-13 07:18 -0800
  Re: Macro for pthread_create() Seebs <usenet-nospam@seebs.net> - 2012-01-10 19:15 +0000
    Re: Macro for pthread_create() daniele@mother.nostromo.wy (daniele.g) - 2012-01-10 23:01 +0100
      Re: Macro for pthread_create() Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-01-10 22:23 +0000
        Re: Macro for pthread_create() Keith Thompson <kst-u@mib.org> - 2012-01-10 15:23 -0800
      Re: Macro for pthread_create() jt@toerring.de (Jens Thoms Toerring) - 2012-01-10 22:27 +0000
        Re: Macro for pthread_create() Keith Thompson <kst-u@mib.org> - 2012-01-10 15:25 -0800
      Re: Macro for pthread_create() Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-01-10 17:31 -0500
        Re: Macro for pthread_create() daniele@mother.nostromo.wy (daniele.g) - 2012-01-11 00:04 +0100
          Re: Macro for pthread_create() James Kuyper <jameskuyper@verizon.net> - 2012-01-10 18:17 -0500
          Re: Macro for pthread_create() Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-01-10 18:29 -0500
      Re: Macro for pthread_create() Ian Collins <ian-news@hotmail.com> - 2012-01-11 11:54 +1300
        Re: Macro for pthread_create() daniele@father.nostromo.wy (daniele.g) - 2012-01-11 10:09 +0100
          Re: Macro for pthread_create() Ian Collins <ian-news@hotmail.com> - 2012-01-11 22:20 +1300
          Re: Macro for pthread_create() James Kuyper <jameskuyper@verizon.net> - 2012-01-11 11:26 -0500
            Re: Macro for pthread_create() daniele@father.nostromo.wy (daniele.g) - 2012-01-12 12:07 +0100
              Re: Macro for pthread_create() James Kuyper <jameskuyper@verizon.net> - 2012-01-12 09:19 -0500
                Re: Macro for pthread_create() Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-01-12 20:34 -0500
            Re: Macro for pthread_create() daniele@father.nostromo.wy (daniele.g) - 2012-01-12 11:52 +0100
          Re: Macro for pthread_create() Seebs <usenet-nospam@seebs.net> - 2012-01-11 18:46 +0000
            Re: Macro for pthread_create() blp@cs.stanford.edu (Ben Pfaff) - 2012-01-11 11:12 -0800

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