text: /************************************************************************
   * sched/pthread/pthread_release.c
   *
   *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ************************************************************************/
  
  /************************************************************************
   * Included Files
   ************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <sched.h>
  #include <debug.h>
  
  #include <nuttx/kmalloc.h>
  
  #include "pthread/pthread.h"
  
  /************************************************************************
   * Definitions
   ************************************************************************/
  
  /************************************************************************
   * Private Type Declarations
   ************************************************************************/
  
  /************************************************************************
   * Global Variables
   ************************************************************************/
  
  /************************************************************************
   * Private Variables
   ************************************************************************/
  
  /************************************************************************
   * Private Functions
   ************************************************************************/
  
  /************************************************************************
   * Public Functions
   ************************************************************************/
  
  /************************************************************************
   * Name: pthread_release
   *
   * Description:
   *   Release pthread resources from the task group with the group
   *   terminated.
   *
   * Parameters:
   *   group = The task group containing the pthread resources to be
   *           released.
   *
   * Return Value:
   *   None
   *
   * Assumptions:
   *
   * POSIX Compatibility:
   *
   ************************************************************************/
  
  void pthread_release(FAR struct task_group_s *group)
  {
    FAR struct join_s *join;
    DEBUGASSERT(group);
  
    /* Visit and delete each join structure still in the list.  Since we
     * are last exiting thread of the group, no special protection should
     * be required.
     */
  
    while (group->tg_joinhead)
      {
        /* Remove the join from the head of the list. */
  
        join = group->tg_joinhead;
        group->tg_joinhead = join->next;
  
        /* Destroy the join semaphores */
  
        (void)sem_destroy(&join->data_sem);
        (void)sem_destroy(&join->exit_sem);
  
        /* And deallocate the join structure */
  
        sched_kfree(join);
      }
  
    /* Destroy the join list semaphore */
  
    (void)sem_destroy(&group->tg_joinsem);
  }
  