3b111c8b99
This commit refactors the wdog module to use absolute time representation internally. The main improvements include: 1. Fixed recursive watchdog handling caused by calling wd_start within watchdog timeout callback function. 2. Simplified timer processing to improve performance and enhance code readability. 3. Improved accuracy of timers. 4. Reduced critical section and interrupt disable time, improving real-time performance. Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com> Signed-off-by: ligd <liguiding1@xiaomi.com>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/****************************************************************************
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* sched/wdog/wd_gettime.c
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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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/wdog.h>
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#include <nuttx/irq.h>
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#include "wdog/wdog.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: wd_gettime
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*
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* Description:
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* This function returns the time remaining before the specified watchdog
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* timer expires.
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*
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* Input Parameters:
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* wdog - watchdog ID
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*
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* Returned Value:
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* The time in system ticks remaining until the watchdog time expires.
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* Zero means either that wdog is not valid or that the wdog has already
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* expired.
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*
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****************************************************************************/
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sclock_t wd_gettime(FAR struct wdog_s *wdog)
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{
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sclock_t delay;
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if (wdog == NULL || !WDOG_ISACTIVE(wdog))
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{
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return 0;
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}
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delay = wdog->expired - clock_systime_ticks();
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return delay < 0 ? 0 : delay;
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}
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