From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] interesting timing tests
Date: Mon, 21 Jun 2010 10:40:57 -0400 [thread overview]
Message-ID: <a4c3e91d8044dc47b504fab2bf11aa54@kw.quanstro.net> (raw)
In-Reply-To: <AANLkTimysByILLkzs6Fs5XfqxmXcQNB3tazBtgbIhHiw@mail.gmail.com>
void
lock(ulong *l)
{
ulong old;
ushort next, owner;
old = _xadd(l, 1);
for(;;){
next = old;
owner = old>>16;
old = *l;
if(next == owner)
break;
}
}
void
unlock(ulong *l)
{
_xadd(l, 1<<16);
}
- erik
next prev parent reply other threads:[~2010-06-21 14:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-18 23:26 erik quanstrom
2010-06-19 13:42 ` Richard Miller
2010-06-20 1:36 ` erik quanstrom
2010-06-20 7:44 ` Richard Miller
2010-06-20 12:45 ` erik quanstrom
2010-06-20 16:51 ` Richard Miller
2010-06-20 21:55 ` erik quanstrom
2010-06-21 1:41 ` erik quanstrom
2010-06-21 3:46 ` Venkatesh Srinivas
2010-06-21 14:40 ` erik quanstrom [this message]
2010-06-21 16:42 ` Venkatesh Srinivas
2010-06-21 16:43 ` erik quanstrom
2010-06-21 21:11 ` Bakul Shah
2010-06-21 21:21 ` erik quanstrom
2010-06-21 21:47 ` Bakul Shah
2010-06-21 22:16 ` erik quanstrom
2010-06-22 3:24 ` Lawrence E. Bakst
2010-06-23 1:09 ` erik quanstrom
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