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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* */
/* This file is part of the class library */
/* SoPlex --- the Sequential object-oriented simPlex. */
/* */
/* Copyright 1996-2022 Zuse Institute Berlin */
/* */
/* 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. */
/* */
/* You should have received a copy of the Apache-2.0 license */
/* along with SoPlex; see the file LICENSE. If not email to soplex@zib.de. */
/* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef _CRING_H_
#define _CRING_H_
/***************************************************************
Double linked ring
***************************************************************/
#define initDR(ring) ((ring).prev = (ring).next = &(ring))
#define init2DR(elem, ring) \
{ \
(elem).next = (ring).next; \
(elem).next->prev = &(elem); \
(elem).prev = &(ring); \
(ring).next = &(elem); \
}
#define removeDR(ring) \
{ \
(ring).next->prev = (ring).prev; \
(ring).prev->next = (ring).next; \
}
#endif // _CRING_H_