urcu/rcuja-range.h

   1 #ifndef _URCU_RCUJA_RANGE_H
   2 #define _URCU_RCUJA_RANGE_H
   3
   4 /*
   5  * urcu/rcuja-range.h
   6  *
   7  * Userspace RCU library - RCU Judy Array Range Support
   8  *
   9  * Copyright 2012-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  24  *
  25  * Include this file _after_ including your URCU flavor.
  26  */
  27
  28 #include <urcu/rcuja.h>
  29 #include <pthread.h>
  30 #include <stdint.h>
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 enum cds_ja_range_type {
  37         CDS_JA_RANGE_ALLOCATED,
  38         CDS_JA_RANGE_FREE,
  39         CDS_JA_RANGE_REMOVED,
  40 };
  41
  42 /*
  43  * Range goes from start (inclusive) to end (inclusive).
  44  * Range start is used as node key in the Judy array.
  45  */
  46 struct cds_ja_range {
  47         uint64_t start, end;
  48         struct cds_ja_node ja_node;
  49         pthread_mutex_t lock;
  50         enum cds_ja_range_type type;
  51         struct rcu_head head;
  52 };
  53
  54 struct cds_ja_range *cds_ja_range_lookup(struct cds_ja *ja, uint64_t key);
  55
  56 struct cds_ja_range *cds_ja_range_lock(struct cds_ja_range *range);
  57
  58 void cds_ja_range_unlock(struct cds_ja_range *range);
  59
  60 struct cds_ja_range *cds_ja_range_add(struct cds_ja *ja,
  61                 uint64_t start,         /* inclusive */
  62                 uint64_t end);          /* inclusive */
  63
  64 int cds_ja_range_del(struct cds_ja *ja, struct cds_ja_range *range);
  65
  66 struct cds_ja *_cds_ja_range_new(const struct rcu_flavor_struct *flavor);
  67
  68 static inline
  69 struct cds_ja *cds_ja_range_new(void)
  70 {
  71         return _cds_ja_range_new(&rcu_flavor);
  72 }
  73
  74 int cds_ja_range_destroy(struct cds_ja *ja);
  75
  76 #ifdef __cplusplus
  77 }
  78 #endif
  79
  80 #endif /* _URCU_RCUJA_H */