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127 lines
4.3 KiB
127 lines
4.3 KiB
/**************************************************************************** |
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* sched/wd_delete.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 <queue.h> |
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#include <errno.h> |
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#include <nuttx/arch.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 Type Declarations |
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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_delete |
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* |
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* Description: |
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* The wd_delete function will deallocate a watchdog by returning it to |
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* the free pool of watchdogs. The watchdog will be removed from the timer |
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* queue if has been started. |
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* |
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* Parameters: |
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* wdId - The watchdog ID to delete. This is actually a pointer to a |
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* watchdog structure. |
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* |
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* Return Value: |
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* Returns OK or ERROR |
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* |
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* Assumptions: |
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* The caller has assured that the watchdog is no longer in use. |
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* |
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****************************************************************************/ |
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int wd_delete(WDOG_ID wdId) |
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{ |
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irqstate_t saved_state; |
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/* Verify that a valid watchdog was provided */ |
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if (!wdId) |
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{ |
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set_errno(EINVAL); |
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return ERROR; |
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} |
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/* The following steps are atomic... the watchdog must not be active when |
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* it is being deallocated. |
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*/ |
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saved_state = irqsave(); |
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/* Check if the watchdog has been started. */ |
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if (wdId->active) |
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{ |
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wd_cancel(wdId); |
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} |
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/* Put the watchdog back on the free list */ |
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sq_addlast((FAR sq_entry_t*)wdId, &g_wdfreelist); |
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irqrestore(saved_state); |
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/* Return success */ |
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return OK; |
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}
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