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118 lines
4.2 KiB
118 lines
4.2 KiB
/******************************************************************************** |
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* sched/wd_gettime.c |
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* |
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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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 NuttX 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 <nuttx/config.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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* 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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* 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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