84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/****************************************************************************
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* sched/group/group_waiter.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 <sys/types.h>
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#include <assert.h>
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#include "nuttx/sched.h"
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#include "group/group.h"
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#if defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_SCHED_HAVE_PARENT)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: group_add_waiter
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*
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* Description:
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* Increment the number of instances of waitpid that are waiting for this
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* group to exit.
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*
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* Assumptions:
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* Caller has assured mutually exclusive access to the group.
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*
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****************************************************************************/
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void group_add_waiter(FAR struct task_group_s *group)
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{
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group->tg_nwaiters++;
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DEBUGASSERT(group->tg_nwaiters > 0);
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}
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/****************************************************************************
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* Name: group_add_waiter
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*
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* Description:
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* Decrement the number of instances of waitpid that are waiting for this
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* group to exit. If the count goes to zero and deletion is pending, the
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* call group_free to release the dangling resources.
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*
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* Assumptions:
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* Caller has assured mutually exclusive access to the group.
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*
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****************************************************************************/
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void group_del_waiter(FAR struct task_group_s *group)
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{
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DEBUGASSERT(group->tg_nwaiters > 0);
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group->tg_nwaiters--;
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if (group->tg_nwaiters == 0 && (group->tg_flags & GROUP_FLAG_DELETED) != 0)
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{
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/* Release the group container (all other resources have already been
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* freed).
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*/
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kmm_free(group);
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}
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}
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#endif /* CONFIG_SCHED_WAITPID && !CONFIG_SCHED_HAVE_PARENT */
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