From owner-freebsd-hackers  Wed Oct  3 14:11: 4 2001
Delivered-To: freebsd-hackers@freebsd.org
Received: from holly.dyndns.org (adsl-208-191-149-224.dsl.hstntx.swbell.net [208.191.149.224])
	by hub.freebsd.org (Postfix) with ESMTP
	id EE01337B403; Wed,  3 Oct 2001 14:10:58 -0700 (PDT)
Received: (from chris@localhost)
	by holly.dyndns.org (8.11.4/8.9.3) id f93L9sI70880;
	Wed, 3 Oct 2001 16:09:54 -0500 (CDT)
	(envelope-from chris)
Date: Wed, 3 Oct 2001 16:09:52 -0500
From: Chris Costello <chris@FreeBSD.ORG>
To: Oleg Golovanov <olmi@home.krasnoyarsk.ru>
Cc: freebsd-questions@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
Subject: Re: Question about pthread
Message-ID: <20011003160951.E57938@holly.calldei.com>
Reply-To: chris@FreeBSD.ORG
References: <3BBB77A7.5C4B129E@home.krasnoyarsk.ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5i
In-Reply-To: <3BBB77A7.5C4B129E@home.krasnoyarsk.ru>; from olmi@home.krasnoyarsk.ru on Thu, Oct 04, 2001 at 04:40:07AM +0800
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-hackers.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-hackers>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-hackers>
X-Loop: FreeBSD.ORG

On Thursday, October 04, 2001, Oleg Golovanov wrote:
> static void *coms(void *arg)
> {
>   pthread_detach(pthread_self());
>   write((int)arg, "Test", sizeof("test"));
>   close((int)arg);
>   return(NULL);
> }

   For starters, this function should be rewritten as

static void *coms(void *arg)
{
   int fd;

   fd = *(int *)arg;
   pthread_detach(pthread_self());
   write(fd, "Test", 4);
   close(fd);
   return (NULL);
}

   Because you're passing the _address_ of `confd', not the
value.  You must first cast arg to an int pointer, and then
dereference it (and assign its value to `fd').

-- 
+-------------------+---------------------------------------------------+
| Chris Costello    | CCITT - Can't Conceive Intelligent Thoughts Today |
| chris@FreeBSD.org |                                                   |
+-------------------+---------------------------------------------------+

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message