src/afs/afs_cbqueue.h

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 /*
  11  * This package is used to actively manage the expiration of callbacks,
  12  * so that the rest of the cache manager doesn't need to compute
  13  * whether a callback has expired or not, but can tell with one simple
  14  * check, that is, whether the CStatd bit is on or off.
  15  */
  16
  17 /* how many seconds in a slot */
  18 #define CBHTSLOTLEN 128
  19 /* how many slots in the table */
  20 #define CBHTSIZE    128
  21 /* 7 is LOG2(slotlen) */
  22 #define CBHash(t) ((t)>>7)
  23
  24 #define CBQTOV(e)           ((struct vcache *)(((char *) (e)) - (((char *)(&(((struct vcache *)(e))->callsort))) - ((char *)(e)))))