diff options
Diffstat (limited to 'nuttx/include/queue.h')
-rw-r--r-- | nuttx/include/queue.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/nuttx/include/queue.h b/nuttx/include/queue.h new file mode 100644 index 000000000..b5aa23690 --- /dev/null +++ b/nuttx/include/queue.h @@ -0,0 +1,129 @@ +/************************************************************************ + * 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 + +EXTERN void sq_addfirst(FAR sq_entry_t *node, sq_queue_t *queue); +EXTERN void dq_addfirst(FAR dq_entry_t *node, dq_queue_t *queue); +EXTERN void sq_addlast(FAR sq_entry_t *node, sq_queue_t *queue); +EXTERN void dq_addlast(FAR dq_entry_t *node, dq_queue_t *queue); +EXTERN void sq_addafter(FAR sq_entry_t *prev, FAR sq_entry_t *node, + sq_queue_t *queue); +EXTERN void dq_addafter(FAR dq_entry_t *prev, FAR dq_entry_t *node, + dq_queue_t *queue); +EXTERN void dq_addbefore(FAR dq_entry_t *next, FAR dq_entry_t *node, + dq_queue_t *queue); + +EXTERN FAR sq_entry_t *sq_remafter(FAR sq_entry_t *node, sq_queue_t *queue); +EXTERN void sq_rem(FAR sq_entry_t *node, sq_queue_t *queue); +EXTERN void dq_rem(FAR dq_entry_t *node, dq_queue_t *queue); +EXTERN FAR sq_entry_t *sq_remlast(sq_queue_t *queue); +EXTERN FAR dq_entry_t *dq_remlast(dq_queue_t *queue); +EXTERN FAR sq_entry_t *sq_remfirst(sq_queue_t *queue); +EXTERN FAR dq_entry_t *dq_remfirst(dq_queue_t *queue); + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __INCLUDE_QUEUE_H_ */ + |