88 lines
2.8 KiB
C
88 lines
2.8 KiB
C
/****************************************************************************
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* sched/mqueue/mq_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 <assert.h>
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#include <nuttx/mqueue.h>
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#include <nuttx/sched.h>
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#include "mqueue/mqueue.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxmq_recover
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*
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* Description:
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* This function is called when a task is deleted via task_deleted or
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* via pthread_cancel. I checks if the task was waiting for a message
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* queue event and adjusts counts appropriately.
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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 nxmq_recover(FAR struct tcb_s *tcb)
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{
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FAR struct mqueue_inode_s *msgq;
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/* If were were waiting for a timed message queue event, then the
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* timer was canceled and deleted in nxtask_recover() before this
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* function was called.
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*/
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/* Was the task waiting for a message queue to become non-empty? */
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msgq = tcb->waitobj;
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if (tcb->task_state == TSTATE_WAIT_MQNOTEMPTY)
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{
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/* Decrement the count of waiters */
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DEBUGASSERT(msgq && msgq->nwaitnotempty > 0);
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msgq->nwaitnotempty--;
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}
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/* Was the task waiting for a message queue to become non-full? */
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else if (tcb->task_state == TSTATE_WAIT_MQNOTFULL)
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{
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/* Decrement the count of waiters */
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DEBUGASSERT(msgq && msgq->nwaitnotfull > 0);
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msgq->nwaitnotfull--;
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}
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}
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