Date: Thu, 15 Dec 2005 22:52:31 +0800 From: prime <guomingyan@gmail.com> To: freebsd-hackers@freebsd.org Subject: Use turnstile to implement sx_lock Message-ID: <1fa17f810512150652h5da6a6a5g3347f841a614689e@mail.gmail.com>
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hi hackers,
I want to use turnstile to implement sx_lock( or read/write lock),but
find that there is a big obstacle,
ONE sx_lock needs TWO queues to put waiters on,one for readers and the
other one for writers,but ONE turnstile can only supply ONE queue,and ONE
sx_lock can only get ONE turnstile.
I read opensolaris' rw_lock implementation and find that its turnstile
has TWO queues which is different from FreeBSD's turnstile.
Are there any good ideas to bypass the obstacle? Thanks very much.
--
Three passions, simple but overwhelmingly strong, have governed my life:
the longing for love, the search for knowledge, and unbearable pity for
the suffering of mankind.
---------Bertrand Russell
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