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c69cf36b7c
This commit simplified the wdog expiration handling by introducing the `g_sched_event` timer. Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/****************************************************************************
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* sched/wdog/wdog.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __SCHED_WDOG_WDOG_H
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#define __SCHED_WDOG_WDOG_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <nuttx/compiler.h>
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#include <nuttx/clock.h>
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#include <nuttx/queue.h>
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#include <nuttx/wdog.h>
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#include <nuttx/arch.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* The g_wdactivelist data structure is a singly linked list ordered by
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* watchdog expiration time. When watchdog timers expire,the functions on
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* this linked list are removed and the function is called.
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*/
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extern struct list_node g_wdactivelist;
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#ifdef CONFIG_SCHED_TICKLESS
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extern bool g_wdtimernested;
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#endif
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/****************************************************************************
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* Inline functions
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****************************************************************************/
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#ifdef CONFIG_SCHED_TICKLESS
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# define wd_in_callback() (g_wdtimernested)
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# define wd_set_nested(f) (g_wdtimernested = (f))
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#else
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# define wd_in_callback() (false)
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# define wd_set_nested(f)
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#endif
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#ifdef CONFIG_SCHED_TICKLESS
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static inline_function void wd_timer_start(clock_t next_tick)
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{
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#ifdef CONFIG_SCHED_TICKLESS_ALARM
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# ifndef CONFIG_ALARM_ARCH
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struct timespec ts;
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clock_ticks2time(&ts, next_tick);
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up_alarm_start(&ts);
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# else
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up_alarm_tick_start(next_tick);
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# endif
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#else
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# ifndef CONFIG_TIMER_ARCH
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struct timespec ts1;
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struct timespec ts2;
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clock_ticks2time(&ts1, next_tick);
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clock_systime_timespec(&ts2);
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clock_timespec_subtract(&ts1, &ts2, &ts1);
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up_timer_start(&ts1);
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# else
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up_timer_tick_start(next_tick - clock_systime_ticks());
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# endif
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#endif
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}
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static inline_function void wd_timer_cancel(void)
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{
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struct timespec ts;
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#ifdef CONFIG_SCHED_TICKLESS_ALARM
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up_alarm_cancel(&ts);
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#else
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up_timer_cancel(&ts);
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#endif
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}
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#else
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# define wd_timer_start(next_tick)
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# define wd_timer_cancel()
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#endif
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static inline_function clock_t wd_next_expire(void)
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{
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return list_first_entry(&g_wdactivelist, struct wdog_s, node)->expired;
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}
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: wd_timer
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*
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* Description:
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* This function is called from the timer interrupt handler to determine
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* if it is time to execute a watchdog function. If so, the watchdog
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* function will be executed in the context of the timer interrupt
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* handler.
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*
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* Input Parameters:
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* ticks - If CONFIG_SCHED_TICKLESS is defined then the number of ticks
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* in the interval that just expired is provided. Otherwise,
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* this function is called on each timer interrupt and a value of one
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* is implicit.
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* noswitches - True: Can't do context switches now.
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*
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* Returned Value:
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* If CONFIG_SCHED_TICKLESS is defined then the number of ticks for the
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* next delay is provided (zero if no delay). Otherwise, this function
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* has no returned value.
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*
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* Assumptions:
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* Called from interrupt handler logic with interrupts disabled.
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*
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****************************************************************************/
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void wd_timer(clock_t ticks);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SCHED_WDOG_WDOG_H */
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