+// SPDX-FileCopyrightText: 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+// SPDX-FileCopyrightText: 2011-2012 Lai Jiangshan <laijs@cn.fujitsu.com>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
#ifndef _URCU_WFCQUEUE_H
#define _URCU_WFCQUEUE_H
/*
- * urcu/wfcqueue.h
- *
* Userspace RCU library - Concurrent Queue with Wait-Free Enqueue/Blocking Dequeue
- *
- * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- * Copyright 2011-2012 - Lai Jiangshan <laijs@cn.fujitsu.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <pthread.h>
pthread_mutex_t lock;
};
-#ifndef __cplusplus
/*
- * The transparent union allows calling functions that work on both
+ * In C, the transparent union allows calling functions that work on both
* struct cds_wfcq_head and struct __cds_wfcq_head on any of those two
* types.
+ *
+ * In C++, implement static inline wrappers using function overloading
+ * to obtain an API similar to C.
+ *
+ * Avoid complaints from clang++ not knowing the transparent union
+ * attribute.
*/
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wignored-attributes"
+#endif
typedef union {
struct __cds_wfcq_head *_h;
struct cds_wfcq_head *h;
} __attribute__((__transparent_union__)) cds_wfcq_head_ptr_t;
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+#ifndef __cplusplus
/*
* This static inline is only present for compatibility with C++. It is
* effect-less in C.
}
#else /* #ifndef __cplusplus */
-/* C++ ignores transparent union. */
-typedef union {
- struct __cds_wfcq_head *_h;
- struct cds_wfcq_head *h;
-} cds_wfcq_head_ptr_t;
-
-/* C++ ignores transparent union. Requires an explicit conversion. */
+/*
+ * This static inline is used by internally in the static inline
+ * implementation of the API.
+ */
static inline cds_wfcq_head_ptr_t __cds_wfcq_head_cast(struct __cds_wfcq_head *head)
{
cds_wfcq_head_ptr_t ret = { ._h = head };
return ret;
}
-/* C++ ignores transparent union. Requires an explicit conversion. */
+
+/*
+ * This static inline is used by internally in the static inline
+ * implementation of the API.
+ */
static inline cds_wfcq_head_ptr_t cds_wfcq_head_cast(struct cds_wfcq_head *head)
{
cds_wfcq_head_ptr_t ret = { .h = head };
#ifdef __cplusplus
}
+
+/*
+ * In C++, implement static inline wrappers using function overloading
+ * to obtain an API similar to C.
+ */
+
+static inline cds_wfcq_head_ptr_t cds_wfcq_head_cast_cpp(struct __cds_wfcq_head *head)
+{
+ cds_wfcq_head_ptr_t ret = { ._h = head };
+ return ret;
+}
+
+static inline cds_wfcq_head_ptr_t cds_wfcq_head_cast_cpp(struct cds_wfcq_head *head)
+{
+ cds_wfcq_head_ptr_t ret = { .h = head };
+ return ret;
+}
+
+template<typename T> static inline bool cds_wfcq_empty(T head,
+ struct cds_wfcq_tail *tail)
+{
+ return cds_wfcq_empty(cds_wfcq_head_cast_cpp(head), tail);
+}
+
+template<typename T> static inline bool cds_wfcq_enqueue(T head,
+ struct cds_wfcq_tail *tail,
+ struct cds_wfcq_node *node)
+{
+ return cds_wfcq_enqueue(cds_wfcq_head_cast_cpp(head), tail, node);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_dequeue_blocking(
+ T head, struct cds_wfcq_tail *tail)
+{
+ return __cds_wfcq_dequeue_blocking(cds_wfcq_head_cast_cpp(head), tail);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_dequeue_with_state_blocking(
+ T head, struct cds_wfcq_tail *tail, int *state)
+{
+ return __cds_wfcq_dequeue_with_state_blocking(cds_wfcq_head_cast_cpp(head),
+ tail, state);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_dequeue_nonblocking(
+ T head, struct cds_wfcq_tail *tail)
+{
+ return __cds_wfcq_dequeue_nonblocking(cds_wfcq_head_cast_cpp(head), tail);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_dequeue_with_state_nonblocking(
+ T head, struct cds_wfcq_tail *tail, int *state)
+{
+ return __cds_wfcq_dequeue_with_state_nonblocking(cds_wfcq_head_cast_cpp(head),
+ tail, state);
+}
+
+template<typename T, typename U> static inline enum cds_wfcq_ret __cds_wfcq_splice_blocking(
+ T dest_q_head,
+ struct cds_wfcq_tail *dest_q_tail,
+ U src_q_head,
+ struct cds_wfcq_tail *src_q_tail)
+{
+ return __cds_wfcq_splice_blocking(cds_wfcq_head_cast_cpp(dest_q_head),
+ dest_q_tail,
+ cds_wfcq_head_cast_cpp(src_q_head),
+ src_q_tail);
+}
+
+template<typename T, typename U> static inline enum cds_wfcq_ret __cds_wfcq_splice_nonblocking(
+ T dest_q_head,
+ struct cds_wfcq_tail *dest_q_tail,
+ U *src_q_head,
+ struct cds_wfcq_tail *src_q_tail)
+{
+ return __cds_wfcq_splice_nonblocking(cds_wfcq_head_cast_cpp(dest_q_head),
+ dest_q_tail,
+ cds_wfcq_head_cast_cpp(src_q_head),
+ src_q_tail);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_first_blocking(
+ T head, struct cds_wfcq_tail *tail)
+{
+ return __cds_wfcq_first_blocking(cds_wfcq_head_cast_cpp(head), tail);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_first_nonblocking(
+ T head, struct cds_wfcq_tail *tail)
+{
+ return __cds_wfcq_first_nonblocking(cds_wfcq_head_cast_cpp(head), tail);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_next_blocking(
+ T head,
+ struct cds_wfcq_tail *tail,
+ struct cds_wfcq_node *node)
+{
+ return __cds_wfcq_next_blocking(cds_wfcq_head_cast_cpp(head), tail, node);
+}
+
+template<typename T> static inline struct cds_wfcq_node *__cds_wfcq_next_nonblocking(
+ T head,
+ struct cds_wfcq_tail *tail,
+ struct cds_wfcq_node *node)
+{
+ return __cds_wfcq_next_nonblocking(cds_wfcq_head_cast_cpp(head), tail, node);
+}
+
#endif
#endif /* _URCU_WFCQUEUE_H */
projects / urcu.git / blobdiff