rcuja/rcuja-shadow-nodes.c

   1 /*
   2  * rcuja/rcuja-hashtable.c
   3  *
   4  * Userspace RCU library - RCU Judy Array Shadow Node Hash Table
   5  *
   6  * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #define _LGPL_SOURCE
  24 #include <stdint.h>
  25 #include <errno.h>
  26 #include <limits.h>
  27
  28 /*
  29  * The hash table used by judy array updates only for the shadow node
  30  * mapping rely on standard urcu_mb flavor. It does not put any
  31  * requirement on the RCU flavor used by applications using the judy
  32  * array.
  33  */
  34 #include <urcu.h>
  35
  36 #include <urcu/rcuja.h>
  37 #include <urcu/compiler.h>
  38 #include <urcu/arch.h>
  39 #include <assert.h>
  40 #include <urcu-pointer.h>
  41
  42 #include "rcuja-internal.h"
  43 #include "bitfield.h"
  44
  45 __attribute__((visibility("protected")))
  46 struct cds_lfht *rcuja_create_ht(void)
  47 {
  48         return cds_lfht_new(1, 1, 0,
  49                 CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING,
  50                 NULL);
  51 }
  52
  53 __attribute__((visibility("protected")))
  54 void rcuja_delete_ht(struct cds_lfht *ht)
  55 {
  56         int ret;
  57
  58         ret = cds_lfht_destroy(ht, NULL);
  59         assert(!ret);
  60 }