wfcqueue.c

   1 /*
   2  * wfcqueue.c
   3  *
   4  * Userspace RCU library - Concurrent queue with Wait-Free Enqueue/Blocking Dequeue
   5  *
   6  * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  * Copyright 2011-2012 - Lai Jiangshan <laijs@cn.fujitsu.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 /* Do not #define _LGPL_SOURCE to ensure we can emit the wrapper symbols */
  25 #include "urcu/wfcqueue.h"
  26 #include "urcu/static/wfcqueue.h"
  27
  28 /*
  29  * library wrappers to be used by non-LGPL compatible source code.
  30  */
  31
  32 void cds_wfcq_node_init(struct cds_wfcq_node *node)
  33 {
  34         _cds_wfcq_node_init(node);
  35 }
  36
  37 void cds_wfcq_init(struct cds_wfcq_head *head,
  38                 struct cds_wfcq_tail *tail)
  39 {
  40         _cds_wfcq_init(head, tail);
  41 }
  42
  43 bool cds_wfcq_empty(struct cds_wfcq_head *head,
  44                 struct cds_wfcq_tail *tail)
  45
  46 {
  47         return _cds_wfcq_empty(head, tail);
  48 }
  49
  50 void cds_wfcq_enqueue(struct cds_wfcq_head *head,
  51                 struct cds_wfcq_tail *tail,
  52                 struct cds_wfcq_node *node)
  53 {
  54         _cds_wfcq_enqueue(head, tail, node);
  55 }
  56
  57 void cds_wfcq_dequeue_lock(struct cds_wfcq_head *head,
  58                 struct cds_wfcq_tail *tail)
  59 {
  60         cds_wfcq_dequeue_lock(head, tail);
  61 }
  62
  63 void cds_wfcq_dequeue_unlock(struct cds_wfcq_head *head,
  64                 struct cds_wfcq_tail *tail)
  65 {
  66         cds_wfcq_dequeue_unlock(head, tail);
  67 }
  68
  69 struct cds_wfcq_node *cds_wfcq_dequeue_blocking(
  70                 struct cds_wfcq_head *head,
  71                 struct cds_wfcq_tail *tail)
  72 {
  73         return _cds_wfcq_dequeue_blocking(head, tail);
  74 }
  75
  76 void cds_wfcq_splice_blocking(
  77                 struct cds_wfcq_head *dest_q_head,
  78                 struct cds_wfcq_tail *dest_q_tail,
  79                 struct cds_wfcq_head *src_q_head,
  80                 struct cds_wfcq_tail *src_q_tail)
  81 {
  82         _cds_wfcq_splice_blocking(dest_q_head, dest_q_tail,
  83                                 src_q_head, src_q_tail);
  84 }
  85
  86 struct cds_wfcq_node *__cds_wfcq_dequeue_blocking(
  87                 struct cds_wfcq_head *head,
  88                 struct cds_wfcq_tail *tail)
  89 {
  90         return ___cds_wfcq_dequeue_blocking(head, tail);
  91 }
  92
  93 void __cds_wfcq_splice_blocking(
  94                 struct cds_wfcq_head *dest_q_head,
  95                 struct cds_wfcq_tail *dest_q_tail,
  96                 struct cds_wfcq_head *src_q_head,
  97                 struct cds_wfcq_tail *src_q_tail)
  98 {
  99         ___cds_wfcq_splice_blocking(dest_q_head, dest_q_tail,
 100                                 src_q_head, src_q_tail);
 101 }
 102
 103 struct cds_wfcq_node *__cds_wfcq_first_blocking(
 104                 struct cds_wfcq_head *head,
 105                 struct cds_wfcq_tail *tail)
 106 {
 107         return ___cds_wfcq_first_blocking(head, tail);
 108 }
 109
 110 struct cds_wfcq_node *__cds_wfcq_next_blocking(
 111                 struct cds_wfcq_head *head,
 112                 struct cds_wfcq_tail *tail,
 113                 struct cds_wfcq_node *node)
 114 {
 115         return ___cds_wfcq_next_blocking(head, tail, node);
 116 }