87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/****************************************************************************
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* sched/group/group_foreachchild.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/nuttx.h>
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#include <nuttx/sched.h>
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#include <nuttx/queue.h>
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#include "group/group.h"
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#ifdef HAVE_GROUP_MEMBERS
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: group_foreachchild
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*
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* Description:
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* Execute a function for each child of a group.
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*
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* Input Parameters:
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* group - The group containing the children
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* handler - The function to be called
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* arg - An additional argument to provide to the handler
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*
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* Returned Value:
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* Success (OK) is always returned unless the handler returns a non-zero
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* value (a negated errno on errors). In that case, the traversal
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* terminates and that non-zero value is returned.
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*
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* Assumptions:
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*
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****************************************************************************/
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int group_foreachchild(FAR struct task_group_s *group,
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foreachchild_t handler, FAR void *arg)
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{
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FAR sq_entry_t *curr;
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FAR sq_entry_t *next;
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int ret = OK;
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DEBUGASSERT(group);
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/* Visit the main thread last (if present) */
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sq_for_every_safe(&group->tg_members, curr, next)
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{
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FAR struct tcb_s *mtcb =
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container_of(curr, struct tcb_s, member);
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ret = handler(mtcb->pid, arg);
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if (ret != OK)
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{
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break;
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}
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}
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return ret;
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}
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#endif /* HAVE_GROUP_MEMBERS */
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