forked from Archive/PX4-Autopilot
130 lines
4.5 KiB
C
130 lines
4.5 KiB
C
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/************************************************************************
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* queue.h
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*
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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#ifndef __QUEUE_H
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#define __QUEUE_H
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <sys/types.h>
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/************************************************************************
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* Pre-processor Definitions
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************************************************************************/
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#define sq_init(q) do { (q)->head = NULL; (q)->tail = NULL; } while (0)
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#define dq_init(q) do { (q)->head = NULL; (q)->tail = NULL; } while (0)
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#define sq_next(p) ((p)->flink)
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#define dq_next(p) ((p)->flink)
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#define dq_prev(p) ((p)->blink)
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#define sq_empty(q) ((q)->head == NULL)
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#define dq_empty(q) ((q)->head == NULL)
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#define sq_peek(q) ((q)->head)
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#define dq_peek(q) ((q)->head)
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/************************************************************************
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* Global Type Declarations
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************************************************************************/
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struct sq_entry_s
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{
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FAR struct sq_entry_s *flink;
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};
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typedef struct sq_entry_s sq_entry_t;
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struct dq_entry_s
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{
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FAR struct dq_entry_s *flink;
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FAR struct dq_entry_s *blink;
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};
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typedef struct dq_entry_s dq_entry_t;
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struct sq_queue_s
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{
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FAR sq_entry_t *head;
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FAR sq_entry_t *tail;
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};
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typedef struct sq_queue_s sq_queue_t;
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struct dq_queue_s
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{
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FAR dq_entry_t *head;
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FAR dq_entry_t *tail;
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};
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typedef struct dq_queue_s dq_queue_t;
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/************************************************************************
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* Global Function Prototypes
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************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C" {
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#else
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#define EXTERN extern
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#endif
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EXTERN void sq_addfirst(FAR sq_entry_t *node, sq_queue_t *queue);
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EXTERN void dq_addfirst(FAR dq_entry_t *node, dq_queue_t *queue);
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EXTERN void sq_addlast(FAR sq_entry_t *node, sq_queue_t *queue);
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EXTERN void dq_addlast(FAR dq_entry_t *node, dq_queue_t *queue);
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EXTERN void sq_addafter(FAR sq_entry_t *prev, FAR sq_entry_t *node,
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sq_queue_t *queue);
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EXTERN void dq_addafter(FAR dq_entry_t *prev, FAR dq_entry_t *node,
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dq_queue_t *queue);
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EXTERN void dq_addbefore(FAR dq_entry_t *next, FAR dq_entry_t *node,
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dq_queue_t *queue);
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EXTERN FAR sq_entry_t *sq_remafter(FAR sq_entry_t *node, sq_queue_t *queue);
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EXTERN void sq_rem(FAR sq_entry_t *node, sq_queue_t *queue);
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EXTERN void dq_rem(FAR dq_entry_t *node, dq_queue_t *queue);
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EXTERN FAR sq_entry_t *sq_remlast(sq_queue_t *queue);
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EXTERN FAR dq_entry_t *dq_remlast(dq_queue_t *queue);
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EXTERN FAR sq_entry_t *sq_remfirst(sq_queue_t *queue);
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EXTERN FAR dq_entry_t *dq_remfirst(dq_queue_t *queue);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __QUEUE_H_ */
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