78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/****************************************************************************
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* sched/wdog/wdog_recover.c
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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 <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.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_recover
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*
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* Description:
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* This function is called from nxtask_recover() when a task is deleted via
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* task_delete() or via pthread_cancel(). It checks if the deleted task
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* is waiting for a timed event and if so cancels the timeout
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*
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* Input Parameters:
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* tcb - The TCB of the terminated task or thread
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*
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* Returned Value:
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* None.
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*
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* Assumptions:
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* This function is called from task deletion logic in a safe context.
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*
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****************************************************************************/
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void wd_recover(FAR struct tcb_s *tcb)
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{
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irqstate_t flags;
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/* The task is being deleted. If it is waiting for any timed event, then
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* tcb->waitdog will be non-NULL. Cancel the watchdog now so that no
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* events occur after the watchdog expires. Obviously there are lots of
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* race conditions here so this will most certainly have to be revisited in
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* the future.
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*/
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flags = enter_critical_section();
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if (tcb->waitdog)
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{
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wd_cancel(tcb->waitdog);
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wd_delete(tcb->waitdog);
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tcb->waitdog = NULL;
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}
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leave_critical_section(flags);
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}
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