105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @addtogroup Threads
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* @{
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*/
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#include <ch.h>
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#ifndef CH_OPTIMIZE_SPEED
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/*
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* Inserts a thread into a priority ordered queue.
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* @param tp the pointer to the thread to be inserted in the list
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* @param tqp the pointer to the threads list header
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* @note the insertion is done by scanning the list from the highest priority
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* toward the lowest
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*/
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void prio_insert(Thread *tp, ThreadsQueue *tqp) {
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Thread *cp = tqp->p_next;
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while ((cp != (Thread *)tqp) && (cp->p_prio >= tp->p_prio))
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cp = cp->p_next;
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/* Insertion on p_prev.*/
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tp->p_prev = (tp->p_next = cp)->p_prev;
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tp->p_prev->p_next = cp->p_prev = tp;
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}
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/*
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* Inserts a thread into a FIFO queue.
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* @param tp the pointer to the thread to be inserted in the list
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* @param tqp the pointer to the threads list header
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*/
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void fifo_insert(Thread *tp, ThreadsQueue *tqp) {
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tp->p_prev = (tp->p_next = (Thread *)tqp)->p_prev;
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tp->p_prev->p_next = tqp->p_prev = tp;
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}
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/*
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* Removes a thread from a FIFO queue.
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* @param tqp the pointer to the threads list header
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*/
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Thread *fifo_remove(ThreadsQueue *tqp) {
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Thread *tp = tqp->p_next;
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(tqp->p_next = tp->p_next)->p_prev = (Thread *)tqp;
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return tp;
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}
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/*
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* Removes a Thread from a FIFO list and returns it.
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* @param tp the pointer to the thread to be removed from the list
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* @param tqp the pointer to the list header
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* @return the removed thread pointer
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*/
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Thread *dequeue(Thread *tp) {
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tp->p_prev->p_next = tp->p_next;
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tp->p_next->p_prev = tp->p_prev;
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return tp;
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}
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/*
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* Inserts a Thread into a stack list.
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* @param tp the pointer to the thread to be inserted in the list
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* @param tlp the pointer to the threads list header
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*/
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void list_insert(Thread *tp, ThreadsList *tlp) {
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tp->p_next = tlp->p_next;
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tlp->p_next = tp;
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}
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/*
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* Removes a Thread from a stack list and returns it.
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* @param tlp the pointer to the threads list header
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* @return the removed thread pointer
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*/
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Thread *list_remove(ThreadsList *tlp) {
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Thread *tp = tlp->p_next;
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tlp->p_next = tp->p_next;
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return tp;
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}
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#endif /* CH_OPTIMIZE_SPEED */
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/** @} */
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