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/*
* Copyright 2019-2021 OARC, Inc.
* Copyright 2017-2018 Akamai Technologies
* Copyright 2006-2016 Nominum, Inc.
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef PERF_LIST_H
#define PERF_LIST_H 1
#include <assert.h>
#define perf_link(type) \
struct { \
type *prev, *next; \
} _link
#define perf_link_init(link) \
{ \
(link)->_link.prev = 0; \
(link)->_link.next = 0; \
}
#define perf_list(type) \
struct { \
type *head, *tail; \
}
#define perf_list_init(list) \
{ \
(list).head = 0; \
(list).tail = 0; \
}
#define perf_list_head(list) ((list).head)
#define perf_list_tail(list) ((list).tail)
#define perf_list_empty(list) (!(list).head)
#define perf_list_append(list, link) \
{ \
if ((list).tail) { \
(list).tail->_link.next = (link); \
} else { \
(list).head = (link); \
} \
(link)->_link.prev = (list).tail; \
(link)->_link.next = 0; \
(list).tail = (link); \
}
#define perf_list_prepend(list, link) \
{ \
if ((list).head) { \
(list).head->_link.prev = (link); \
} else { \
(list).tail = (link); \
} \
(link)->_link.prev = 0; \
(link)->_link.next = (list).head; \
(list).head = (link); \
}
#define perf_list_unlink(list, link) \
{ \
if ((link)->_link.next) { \
(link)->_link.next->_link.prev = (link)->_link.prev; \
} else { \
assert((list).tail == (link)); \
(list).tail = (link)->_link.prev; \
} \
if ((link)->_link.prev) { \
(link)->_link.prev->_link.next = (link)->_link.next; \
} else { \
assert((list).head == (link)); \
(list).head = (link)->_link.next; \
} \
(link)->_link.next = 0; \
(link)->_link.prev = 0; \
assert((list).head != (link)); \
assert((list).tail != (link)); \
}
#endif
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