100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/****************************************************************************
|
|
* sched/wdog/wd_gettime.c
|
|
*
|
|
* Copyright (C) 2007, 2009, 2014-2016 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <nuttx/wdog.h>
|
|
#include <nuttx/irq.h>
|
|
|
|
#include "wdog/wdog.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: wd_gettime
|
|
*
|
|
* Description:
|
|
* This function returns the time remaining before the specified watchdog
|
|
* expires.
|
|
*
|
|
* Parameters:
|
|
* wdog = watchdog ID
|
|
*
|
|
* Return Value:
|
|
* The time in system ticks remaining until the watchdog time expires.
|
|
* Zero means either that wdog is not valid or that the wdog has already
|
|
* expired.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int wd_gettime(WDOG_ID wdog)
|
|
{
|
|
irqstate_t flags;
|
|
|
|
/* Verify the wdog */
|
|
|
|
flags = enter_critical_section();
|
|
if (wdog && WDOG_ISACTIVE(wdog))
|
|
{
|
|
/* Traverse the watchdog list accumulating lag times until we find the
|
|
* wdog that we are looking for
|
|
*/
|
|
|
|
FAR struct wdog_s *curr;
|
|
int delay = 0;
|
|
|
|
for (curr = (FAR struct wdog_s *)g_wdactivelist.head;
|
|
curr != NULL;
|
|
curr = curr->next)
|
|
{
|
|
delay += curr->lag;
|
|
if (curr == wdog)
|
|
{
|
|
leave_critical_section(flags);
|
|
return delay;
|
|
}
|
|
}
|
|
}
|
|
|
|
leave_critical_section(flags);
|
|
return 0;
|
|
}
|