109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/****************************************************************************
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* libc/pthread/pthread_attrinit.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <pthread.h>
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#include <string.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/pthread.h>
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* Default pthread attributes (see include/nuttx/pthread.h). When configured
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* to build separate kernel- and user-address spaces, this global is
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* duplicated in each address spaced. This copy can only be shared within
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* the user address space.
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*/
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#if (defined(CONFIG_BUILD_PROTECTED) || defined(CONFIG_BUILD_KERNEL)) && \
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!defined(__KERNEL__)
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const pthread_attr_t g_default_pthread_attr = PTHREAD_ATTR_INITIALIZER;
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Function: pthread_attr_init
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*
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* Description:
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* Initializes a thread attributes object (attr) with
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* default values for all of the individual attributes
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* used by a given implementation.
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*
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* Parameters:
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* attr
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*
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* Return Value:
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* 0 on success, otherwise an error number
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*
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* Assumptions:
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*
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****************************************************************************/
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int pthread_attr_init(FAR pthread_attr_t *attr)
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{
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int ret = OK;
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linfo("attr=0x%p\n", attr);
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if (!attr)
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{
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ret = ENOMEM;
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}
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else
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{
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/* Set the child thread priority to be the default
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* priority. Set the child stack size to some arbitrary
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* default value.
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*/
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memcpy(attr, &g_default_pthread_attr, sizeof(pthread_attr_t));
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}
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linfo("Returning %d\n", ret);
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return ret;
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}
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