e72dce9e1b
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1951 42af7a65-404d-4744-a932-0658087f49c3
117 lines
4.2 KiB
C
117 lines
4.2 KiB
C
/********************************************************************************
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* wd_gettime.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <sys/types.h>
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#include <wdog.h>
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#include "os_internal.h"
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#include "wd_internal.h"
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/********************************************************************************
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* Definitions
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********************************************************************************/
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/********************************************************************************
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* Private Types
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********************************************************************************/
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/********************************************************************************
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* Global Variables
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********************************************************************************/
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/********************************************************************************
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* Private Variables
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********************************************************************************/
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/********************************************************************************
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* Private Functions
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********************************************************************************/
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/********************************************************************************
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* Public Functions
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********************************************************************************/
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/********************************************************************************
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* Function: 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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* expires.
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*
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* Parameters:
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* wdog = watchdog ID
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*
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* Return Value:
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* The time in system ticks remaining until the watchdog time expires. Zero
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* means either that wdog is not valid or that the wdog has already expired.
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*
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* Assumptions:
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*
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********************************************************************************/
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int wd_gettime(WDOG_ID wdog)
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{
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irqstate_t flags;
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/* Verify the wdog */
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flags = irqsave();
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if (wdog && wdog->active)
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{
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/* Traverse the watchdog list accumulating lag times until we find the wdog
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* that we are looking for
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*/
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wdog_t *curr;
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int delay = 0;
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for (curr = (wdog_t*)g_wdactivelist.head; curr; curr = curr->next)
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{
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delay += curr->lag;
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if (curr == wdog)
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{
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irqrestore(flags);
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return delay;
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}
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}
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}
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irqrestore(flags);
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return 0;
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}
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