X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=include%2Furcu%2Fwfcqueue.h;h=bd920ca488b6b0feedb243383fe641b0741842a2;hb=HEAD;hp=407c0dbdbb39118473789b3f4a446ef02062db29;hpb=014775106c60f02818ca755b331f887030bd440f;p=urcu.git diff --git a/include/urcu/wfcqueue.h b/include/urcu/wfcqueue.h index 407c0db..bba5c55 100644 --- a/include/urcu/wfcqueue.h +++ b/include/urcu/wfcqueue.h @@ -1,27 +1,13 @@ +// SPDX-FileCopyrightText: 2010-2012 Mathieu Desnoyers +// SPDX-FileCopyrightText: 2011-2012 Lai Jiangshan +// +// 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 - * Copyright 2011-2012 - Lai Jiangshan - * - * 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 @@ -73,17 +59,30 @@ struct cds_wfcq_head { 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. @@ -103,19 +102,20 @@ static inline struct cds_wfcq_head *cds_wfcq_head_cast(struct cds_wfcq_head *hea } #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 }; @@ -482,6 +482,115 @@ extern struct cds_wfcq_node *__cds_wfcq_next_nonblocking( #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 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 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 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 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 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 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 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 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 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 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 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 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 */