nuttx/sched/group/group_join.c

111 lines
3.4 KiB
C
Raw Normal View History

/****************************************************************************
* sched/group/group_join.c
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sched.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/kmalloc.h>
#include "sched/sched.h"
#include "group/group.h"
#include "environ/environ.h"
#ifndef CONFIG_DISABLE_PTHREAD
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: group_bind
*
* Description:
* A thread joins the group when it is created.
*
* Input Parameters:
* tcb - The TCB of the new "child" task that need to join the group.
*
* Assumptions:
* - The parent task from which the group will be inherited is the task at
* the head of the ready to run list.
* - Called during thread creation in a safe context. No special precautions
* are required here.
*
****************************************************************************/
void group_bind(FAR struct pthread_tcb_s *tcb)
{
FAR struct tcb_s *ptcb = this_task();
DEBUGASSERT(ptcb && tcb && ptcb->group && !tcb->cmn.group);
/* Copy the group reference from the parent to the child */
tcb->cmn.group = ptcb->group;
}
/****************************************************************************
* Name: group_join
*
* Description:
* A thread joins the group when it is created.
*
* Input Parameters:
* tcb - The TCB of the new "child" task that need to join the group.
*
* Assumptions:
* - The parent task from which the group will be inherited is the task at
* the head of the ready to run list.
* - Called during thread creation in a safe context. No special precautions
* are required here.
*
****************************************************************************/
void group_join(FAR struct pthread_tcb_s *tcb)
{
FAR struct task_group_s *group;
irqstate_t flags;
DEBUGASSERT(tcb && tcb->cmn.group);
/* Get the group from the TCB */
group = tcb->cmn.group;
/* Add the member to the group */
flags = spin_lock_irqsave(NULL);
sq_addfirst(&tcb->cmn.member, &group->tg_members);
spin_unlock_irqrestore(NULL, flags);
}
#endif /* !CONFIG_DISABLE_PTHREAD */