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