cvs commit: src/sys/kern kern_rwlock.c src/sys/sys rwlock.h

Robert Watson rwatson at
Fri Aug 8 14:36:56 UTC 2008

rwatson     2008-08-08 14:36:21 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/kern             kern_rwlock.c 
    sys/sys              rwlock.h 
  SVN rev 181429 on 2008-08-08 14:36:21Z by rwatson
  Merge r177843,178147 from head to stable/7:
    Add rw_try_rlock() and rw_try_wlock() to rwlocks.
    These functions try the specified operation (rlocking and wlocking) and
    true is returned if the operation completes, false otherwise.
    The KPI is enriched by this commit, so __FreeBSD_version bumping and
    manpage updating will happen soon.
    Requested by:   jeff, kris
    Trylocks were implemented, remove stale comment
  Discussed with: attilio, jhb
  Revision  Changes    Path  +48 -0     src/sys/kern/kern_rwlock.c  +4 -2      src/sys/sys/rwlock.h

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