git: kernel - Add refcount_release_wakeup() and refcount_wait()

[Matthew Dillon]

commit 12f43c12a9e5a40d22be28f83df5b323921d2567
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu Apr 21 12:02:58 2011 -0700

    kernel - Add refcount_release_wakeup() and refcount_wait()
    
    * refcount_release_wakeup() releases a reference count and wakes up
      any waiters on the 1->0 transition.
    
    * refcount_wait() waits for the last reference to go away.  When using
      this function all release operations on the field must use
      refcount_release_wakeup().

Summary of changes:
 sys/conf/files           |    1 +
 sys/kern/kern_refcount.c |  113 ++++++++++++++++++++++++++++++++++++++++++++++
 sys/sys/refcount.h       |   49 +++++++++++++++++---
 3 files changed, 156 insertions(+), 7 deletions(-)
 create mode 100644 sys/kern/kern_refcount.c

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/12f43c12a9e5a40d22be28f83df5b323921d2567


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