110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/****************************************************************************
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* sched/pthread/pthread_detach.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 <sys/types.h>
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#include <stdbool.h>
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#include <pthread.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include "sched/sched.h"
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#include "group/group.h"
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#include "pthread/pthread.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pthread_detach
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*
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* Description:
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* A thread object may be "detached" to specify that the return value
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* and completion status will not be requested.
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*
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* The caller's task/thread must belong to the same "task group" as the
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* pthread is (or was) a member of. The thread may or may not still
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* be running.
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*
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* Input Parameters:
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* thread
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*
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* Returned Value:
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* 0 if successful. Otherwise, an error code.
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*
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* Assumptions:
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*
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****************************************************************************/
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int pthread_detach(pthread_t thread)
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{
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FAR struct tcb_s *rtcb = this_task();
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FAR struct task_group_s *group = rtcb->group;
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FAR struct join_s *pjoin;
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int ret = OK;
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sinfo("Thread=%d group=%p\n", thread, group);
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DEBUGASSERT(group);
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/* Find the entry associated with this pthread. */
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nxmutex_lock(&group->tg_joinlock);
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ret = pthread_findjoininfo(group, (pid_t)thread, &pjoin);
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if (ret == OK)
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{
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/* Has the thread already terminated? */
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if (pjoin->terminated)
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{
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/* YES.. just remove the thread entry. */
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pthread_destroyjoin(group, pjoin);
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}
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else
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{
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/* NO.. Just mark the thread as detached. It
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* will be removed and deallocated when the
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* thread exits
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*/
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if (pjoin->detached)
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{
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ret = EINVAL;
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}
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else
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{
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pjoin->detached = true;
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}
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}
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}
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nxmutex_unlock(&group->tg_joinlock);
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sinfo("Returning %d\n", ret);
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return ret;
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}
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