From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <ee9e417a050520080026bea02b@mail.gmail.com>
Date: Fri, 20 May 2005 11:00:31 -0400
From: Russ Cox <russcox@gmail.com>
To: Sergey Reva <rs_rlab@mail.ru>,
	Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] return vlong
In-Reply-To: <5114550406.20050520175310@mail.ru>
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References: <5114550406.20050520175310@mail.ru>
Cc: 
Topicbox-Message-UUID: 4dc08f02-ead0-11e9-9d60-3106f5b1d025

a call to a function that returns a vlong or structure
passes an invisible (to the c programmer) first argument
that is a pointer to somewhere to write the return value.
so the following two functions have equivalent assembly
(but different c types):

vlong
return0(void)
{
    return 0;
}

void
return0(vlong *v)
{
    *v =3D 0;
}

russ