1 #ifndef _URCU_WFQUEUE_H
2 #define _URCU_WFQUEUE_H
7 * Userspace RCU library - Queue with Wait-Free Enqueue/Blocking Dequeue
9 * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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
28 #include <urcu/compiler.h>
34 #ifndef CDS_WFQ_DEPRECATED
35 #define CDS_WFQ_DEPRECATED \
36 CDS_DEPRECATED("urcu/wfqueue.h is deprecated. Please use urcu/wfcqueue.h instead.")
40 * Queue with wait-free enqueue/blocking dequeue.
41 * This implementation adds a dummy head node when the queue is empty to ensure
42 * we can always update the queue locklessly.
44 * Inspired from half-wait-free/half-blocking queue implementation done by
49 struct cds_wfq_node
*next
;
52 struct cds_wfq_queue
{
53 struct cds_wfq_node
*head
, **tail
;
54 struct cds_wfq_node dummy
; /* Dummy node */
60 #include <urcu/static/wfqueue.h>
62 static inline CDS_WFQ_DEPRECATED
63 void cds_wfq_node_init(struct cds_wfq_node
*node
)
65 _cds_wfq_node_init(node
);
68 static inline CDS_WFQ_DEPRECATED
69 void cds_wfq_init(struct cds_wfq_queue
*q
)
74 static inline CDS_WFQ_DEPRECATED
75 void cds_wfq_enqueue(struct cds_wfq_queue
*q
, struct cds_wfq_node
*node
)
77 _cds_wfq_enqueue(q
, node
);
80 static inline CDS_WFQ_DEPRECATED
81 struct cds_wfq_node
*__cds_wfq_dequeue_blocking(struct cds_wfq_queue
*q
)
83 return ___cds_wfq_dequeue_blocking(q
);
86 static inline CDS_WFQ_DEPRECATED
87 struct cds_wfq_node
*cds_wfq_dequeue_blocking(struct cds_wfq_queue
*q
)
89 return _cds_wfq_dequeue_blocking(q
);
92 #else /* !_LGPL_SOURCE */
94 extern CDS_WFQ_DEPRECATED
95 void cds_wfq_node_init(struct cds_wfq_node
*node
);
97 extern CDS_WFQ_DEPRECATED
98 void cds_wfq_init(struct cds_wfq_queue
*q
);
100 extern CDS_WFQ_DEPRECATED
101 void cds_wfq_enqueue(struct cds_wfq_queue
*q
, struct cds_wfq_node
*node
);
103 /* __cds_wfq_dequeue_blocking: caller ensures mutual exclusion between dequeues */
104 extern CDS_WFQ_DEPRECATED
105 struct cds_wfq_node
*__cds_wfq_dequeue_blocking(struct cds_wfq_queue
*q
);
107 extern CDS_WFQ_DEPRECATED
108 struct cds_wfq_node
*cds_wfq_dequeue_blocking(struct cds_wfq_queue
*q
);
110 #endif /* !_LGPL_SOURCE */
116 #endif /* _URCU_WFQUEUE_H */
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