text: /****************************************************************************
   *
   * Copyright 2016 Samsung Electronics All Rights Reserved.
   *
   * Licensed 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.
   *
   ****************************************************************************/
  /****************************************************************************
   * libc/pthread/pthread_attrinit.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 <tinyara/config.h>
  
  #include <sys/types.h>
  #include <pthread.h>
  #include <string.h>
  #include <debug.h>
  #include <errno.h>
  
  #include <tinyara/pthread.h>
  
  /****************************************************************************
   * Definitions
   ****************************************************************************/
  
  /****************************************************************************
   * Private Type Declarations
   ****************************************************************************/
  
  /****************************************************************************
   * Global Variables
   ****************************************************************************/
  
  /* Default pthread attributes (see include/tinyara/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
  
  /****************************************************************************
   * Private Variables
   ****************************************************************************/
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Function:  pthread_attr_init
   *
   * Description:
   *   Initializes a thread attributes object (attr) with
   *   default values for all of the individual attributes
   *   used by a given implementation.
   *
   * Parameters:
   *   attr
   *
   * Return Value:
   *   0 on success, otherwise an error number
   *
   * Assumptions:
   *
   ****************************************************************************/
  
  int pthread_attr_init(FAR pthread_attr_t *attr)
  {
  	int ret = OK;
  
  	svdbg("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));
  	}
  
  	svdbg("Returning %d\n", ret);
  	return ret;
  }
  