text: /****************************************************************************
   * libs/libc/pthread/pthread_attr_init.c
   *
   *   Copyright (C) 2007-2009, 2011 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 <pthread.h>
  #include <string.h>
  #include <debug.h>
  #include <errno.h>
  
  #include <nuttx/pthread.h>
  
  /****************************************************************************
   * Public Data
   ****************************************************************************/
  
  /* Default pthread attributes (see include/nuttx/pthread.h).  When configured
   * to build separate kernel- and user-address spaces, this global is
   * duplicated in each address spaced.  This copy can only be shared within
   * the user address space.
   */
  
  #if (defined(CONFIG_BUILD_PROTECTED) || defined(CONFIG_BUILD_KERNEL)) && \
      !defined(__KERNEL__)
  const pthread_attr_t g_default_pthread_attr = PTHREAD_ATTR_INITIALIZER;
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name:  pthread_attr_init
   *
   * Description:
   *   Initializes a thread attributes object (attr) with
   *   default values for all of the individual attributes
   *   used by a given implementation.
   *
   * Input Parameters:
   *   attr
   *
   * Returned Value:
   *   0 on success, otherwise an error number
   *
   * Assumptions:
   *
   ****************************************************************************/
  
  int pthread_attr_init(FAR pthread_attr_t *attr)
  {
    int ret = OK;
  
    linfo("attr=0x%p\n", attr);
    if (!attr)
      {
        ret = ENOMEM;
      }
    else
      {
        /* Set the child thread priority to be the default
         * priority. Set the child stack size to some arbitrary
         * default value.
         */
  
        memcpy(attr, &g_default_pthread_attr, sizeof(pthread_attr_t));
      }
  
    linfo("Returning %d\n", ret);
    return ret;
  }
  