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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file chlists.h
* @brief Thread queues/lists macros and structures.
* @note All the macros present in this module, while public, are not
* an OS API and should not be directly used in the user applications
* code.
*
* @addtogroup internals
* @{
*/
#ifndef _CHLISTS_H_
#define _CHLISTS_H_
typedef struct Thread Thread;
/**
* @brief Threads queue initialization.
*/
#define queue_init(tqp) ((tqp)->p_next = (tqp)->p_prev = (Thread *)(tqp));
/**
* @brief Threads list initialization.
*/
#define list_init(tlp) ((tlp)->p_next = (Thread *)(tlp))
/**
* @brief Evaluates to @p TRUE if the specified threads queue or list is
* empty.
*/
#define isempty(p) ((p)->p_next == (Thread *)(p))
/**
* @brief Evaluates to @p TRUE if the specified threads queue or list is
* not empty.
*/
#define notempty(p) ((p)->p_next != (Thread *)(p))
/**
* @brief Data part of a static threads queue initializer.
* @details This macro should be used when statically initializing a threads
* queue that is part of a bigger structure.
*
* @param[in] name the name of the threads queue variable
*/
#define _THREADSQUEUE_DATA(name) {(Thread *)&name, (Thread *)&name}
/**
* @brief Static threads queue initializer.
* @details Statically initialized threads queues require no explicit
* initialization using @p queue_init().
*
* @param[in] name the name of the threads queue variable
*/
#define THREADSQUEUE_DECL(name) ThreadsQueue name = _THREADSQUEUE_DATA(name)
/**
* @extends ThreadsList
*
* @brief Generic threads bidirectional linked list header and element.
*/
typedef struct {
Thread *p_next; /**< First @p Thread in the queue, or
@p ThreadQueue when empty. */
Thread *p_prev; /**< Last @p Thread in the queue, or
@p ThreadQueue when empty. */
} ThreadsQueue;
/**
* @brief Generic threads single link list, it works like a stack.
*/
typedef struct {
Thread *p_next; /**< Last pushed @p Thread on the stack
list, or pointer to itself if
empty. */
} ThreadsList;
#if !CH_OPTIMIZE_SPEED
#ifdef __cplusplus
extern "C" {
#endif
void prio_insert(Thread *tp, ThreadsQueue *tqp);
void queue_insert(Thread *tp, ThreadsQueue *tqp);
Thread *fifo_remove(ThreadsQueue *tqp);
Thread *lifo_remove(ThreadsQueue *tqp);
Thread *dequeue(Thread *tp);
void list_insert(Thread *tp, ThreadsList *tlp);
Thread *list_remove(ThreadsList *tlp);
#ifdef __cplusplus
}
#endif
#endif /* !CH_OPTIMIZE_SPEED */
#endif /* _CHLISTS_H_ */
/** @} */
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