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/****************************************************************************
* lib/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 <nuttx/config.h>
#include <pthread.h>
#include <string.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/pthread.h>
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/* Default pthread attributes (see included/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_NUTTX_KERNEL) && !defined(__KERNEL__)
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;
sdbg("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));
}
sdbg("Returning %d\n", ret);
return ret;
}
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