134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2014 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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* @brief Pointer to a halt error message.
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* @note The message is meant to be retrieved by the debugger after the
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* system halt caused by an unexpected error.
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*/
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const char *osal_halt_msg;
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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 OSAL module initialization.
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*
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* @api
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*/
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void osalInit(void) {
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}
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/**
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* @brief System halt with error message.
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*
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* @param[in] reason the halt message pointer
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*
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* @api
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*/
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#if !defined(__DOXYGEN__)
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__attribute__((weak, noreturn))
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#endif
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void osalSysHalt(const char *reason) {
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osalIsrDisable();
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osal_halt_msg = reason;
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while (1)
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;
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}
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/**
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* @brief Enqueues the caller thread.
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* @details The caller thread is enqueued and put to sleep until it is
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* dequeued or the specified timeouts expires.
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*
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* @param[in] tqp pointer to the threads queue object
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* @param[in] time the timeout in system ticks, the special values are
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* handled as follow:
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* - @a TIME_INFINITE the thread enters an infinite sleep
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* state.
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* - @a TIME_IMMEDIATE the thread is not enqueued and
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* the function returns @p MSG_TIMEOUT as if a timeout
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* occurred.
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* .
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* @return The message from @p osalQueueWakeupOneI() or
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* @p osalQueueWakeupAllI() functions.
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* @retval RDY_TIMEOUT if the thread has not been dequeued within the
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* specified timeout or if the function has been
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* invoked with @p TIME_IMMEDIATE as timeout
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* specification.
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*
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* @sclass
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*/
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msg_t osalQueueGoSleepTimeoutS(threads_queue_t *tqp, systime_t time) {
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msg_t msg;
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virtual_timer_t vt;
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void wakeup(void *p) {
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osalSysLockFromISR();
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osalThreadResumeI((thread_reference_t *)p, MSG_TIMEOUT);
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osalSysUnlockFromISR();
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}
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if (TIME_IMMEDIATE == time)
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return MSG_TIMEOUT;
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tqp->tr = NULL;
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if (TIME_INFINITE == time)
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return osalThreadSuspendS(&tqp->tr);
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osalVTSetI(&vt, time, wakeup, (void *)&tqp->tr);
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msg = osalThreadSuspendS(&tqp->tr);
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if (osalVTIsArmedI(&vt))
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osalVTResetI(&vt);
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return msg;
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}
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/** @} */
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