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Date:      Wed, 19 Apr 2006 21:06:52 +0000 (UTC)
From:      John Baldwin <jhb@FreeBSD.org>
To:        src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   cvs commit: src/sys/kern kern_rwlock.c src/sys/sys rwlock.h
Message-ID:  <200604192106.k3JL6qLq043987@repoman.freebsd.org>
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jhb         2006-04-19 21:06:52 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_rwlock.c 
    sys/sys              rwlock.h 
  Log:
  Implement rw_try_upgrade() and rw_downgrade().  rw_try_upgrade() makes a
  single attempt at upgrading a read lock to a write lock, and rw_downgrade()
  converts curthread's write lock into a read lock.
  
  Revision  Changes    Path
  1.9       +133 -2    src/sys/kern/kern_rwlock.c
  1.3       +5 -1      src/sys/sys/rwlock.h
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