116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file osal.c
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* @brief OSAL module code.
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*
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* @addtogroup OSAL
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* @{
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*/
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#include "osal.h"
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/*===========================================================================*/
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/* Module local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module exported functions. */
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/*===========================================================================*/
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/**
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* @brief Dequeues and wakes up one thread from the queue, if any.
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*
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* @param[in] tqp pointer to the threads queue object
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* @param[in] msg the message code
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*
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* @iclass
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*/
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void osalThreadDequeueNextI(threads_queue_t *tqp, msg_t msg) {
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semaphore_t *sp = &tqp->sem;
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if (chSemGetCounterI(&tqp->sem) < (cnt_t)0) {
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thread_t *tp = nil.threads;
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while (true) {
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/* Is this thread waiting on this semaphore?*/
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if (tp->u1.semp == sp) {
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sp->cnt++;
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chDbgAssert(NIL_THD_IS_WTSEM(tp), "not waiting");
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(void) chSchReadyI(tp, msg);
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return;
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}
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tp++;
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chDbgAssert(tp < &nil.threads[NIL_CFG_NUM_THREADS],
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"pointer out of range");
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}
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}
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}
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/**
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* @brief Dequeues and wakes up all threads from the queue.
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*
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* @param[in] tqp pointer to the threads queue object
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* @param[in] msg the message code
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*
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* @iclass
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*/
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void osalThreadDequeueAllI(threads_queue_t *tqp, msg_t msg) {
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semaphore_t *sp = &tqp->sem;
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thread_t *tp;
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cnt_t cnt;
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cnt = sp->cnt;
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sp->cnt = (cnt_t)0;
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tp = nil.threads;
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while (cnt < (cnt_t)0) {
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chDbgAssert(tp < &nil.threads[NIL_CFG_NUM_THREADS],
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"pointer out of range");
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/* Is this thread waiting on this semaphore?*/
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if (tp->u1.semp == sp) {
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chDbgAssert(NIL_THD_IS_WTSEM(tp), "not waiting");
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cnt++;
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(void) chSchReadyI(tp, msg);
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}
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tp++;
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}
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}
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/** @} */
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