K 10
svn:author
V 8
bmilekic
K 8
svn:date
V 27
2001-03-06T06:17:05.000000Z
K 7
svn:log
V 614
- Add sx_descr description member to sx lock structure
- Add sx_xholder member to sx struct which is used for INVARIANTS-enabled
  assertions. It indicates the thread that presently owns the xlock.
- Add some assertions to the sx lock code that will detect the fatal
  API abuse:
     xlock --> xlock
     xlock --> slock
  which now works thanks to sx_xholder.
  Notice that the remaining two problematic cases:
     slock --> xlock
     slock --> slock (a little less problematic, but still recursion)
  will need to be handled by witness eventually, as they are more
  involved.

Reviewed by: jhb, jake, jasone

END