133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/****************************************************************************
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* sched/wdog/wd_cancel.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <stdbool.h>
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/wdog.h>
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#include <nuttx/sched_note.h>
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#include "sched/sched.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_cancel
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*
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* Description:
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* This function cancels a currently running watchdog timer. Watchdog
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* timers may be canceled from the interrupt level.
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*
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* Input Parameters:
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* wdog - ID of the watchdog to cancel.
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*
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* Returned Value:
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* Zero (OK) is returned on success; A negated errno value is returned to
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* indicate the nature of any failure.
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*
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****************************************************************************/
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int wd_cancel(FAR struct wdog_s *wdog)
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{
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irqstate_t flags;
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int ret;
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flags = enter_critical_section();
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ret = wd_cancel_irq(wdog);
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leave_critical_section(flags);
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return ret;
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}
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/****************************************************************************
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* Name: wd_cancel_irq
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*
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* Description:
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* This function cancels a currently running watchdog timer. Watchdog
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* timers may be cancelled from the interrupt level. This function is
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* intended to be called from critical sections.
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*
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* Input Parameters:
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* wdog - ID of the watchdog to cancel.
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*
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* Returned Value:
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* Zero (OK) is returned on success; A negated errno value is returned to
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* indicate the nature of any failure.
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*
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****************************************************************************/
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int wd_cancel_irq(FAR struct wdog_s *wdog)
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{
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if (wdog == NULL)
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{
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return -EINVAL;
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}
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sched_note_wdog(NOTE_WDOG_CANCEL, (FAR void *)wdog->func,
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(FAR void *)(uintptr_t)wdog->expired);
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/* Prohibit timer interactions with the timer queue until the
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* cancellation is complete
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*/
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/* Make sure that the watchdog is still active. */
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if (WDOG_ISACTIVE(wdog))
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{
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bool head = list_is_head(&g_wdactivelist, &wdog->node);
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/* Now, remove the watchdog from the timer queue */
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list_delete(&wdog->node);
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/* Mark the watchdog inactive */
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wdog->func = NULL;
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if (head)
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{
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/* If the watchdog is at the head of the timer queue, then
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* we will need to re-adjust the interval timer that will
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* generate the next interval event.
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*/
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nxsched_reassess_timer();
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}
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}
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return OK;
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}
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