cvs commit: src/sys/netipsec key.c

[Pawel Jakub Dawidek]

pjd         2006-05-20 15:35:37 UTC

  FreeBSD src repository

  Modified files:
    sys/netipsec         key.c 
  Log:
  Prevent disappearing SAD entries by implementing MPsafe refcounting.
  "Why didn't he use SECASVAR_LOCK()/SECASVAR_UNLOCK() macros to
   synchronize access to the secasvar structure's fields?" one may ask.
  There were two reasons:
  1. refcount(9) is faster then mutex(9) synchronization (one atomic
     operation instead of two).
  2. Those macros are not used now at all, so at some point we may decide
     to remove them entirely.
  
  OK'ed by:       gnn
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.22      +33 -20    src/sys/netipsec/key.c