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/********************************************************************************
* lib/pthread/pthread_barrierattrsetpshared.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 <errno.h>
#include <debug.h>
/********************************************************************************
* Definitions
********************************************************************************/
/********************************************************************************
* Private Type Declarations
********************************************************************************/
/********************************************************************************
* Global Variables
********************************************************************************/
/********************************************************************************
* Private Variables
********************************************************************************/
/********************************************************************************
* Private Function Prototypes
********************************************************************************/
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Function: pthread_barrierattr_setpshared
*
* Description:
* The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit a
* barrier to be operated upon by any thread that has access to the memory where
* the barrier is allocated. If the process-shared attribute is
* PTHREAD_PROCESS_PRIVATE, the barrier can only be operated upon by threads
* created within the same process as the thread that initialized the barrier.
* If threads of different processes attempt to operate on such a barrier, the
* behavior is undefined. The default value of the attribute is
* PTHREAD_PROCESS_PRIVATE.
*
* Both constants PTHREAD_PROCESS_SHARED and PTHREAD_PROCESS_PRIVATE are defined
* in pthread.h.
*
* Parameters:
* attr - barrier attributes to be modified.
* pshared - the new value of the pshared attribute.
*
* Return Value:
* 0 (OK) on success or EINVAL if either attr is invalid or pshared is not one
* of PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.
*
* Assumptions:
*
********************************************************************************/
int pthread_barrierattr_setpshared(FAR pthread_barrierattr_t *attr, int pshared)
{
int ret = OK;
if (!attr || (pshared != PTHREAD_PROCESS_SHARED && pshared != PTHREAD_PROCESS_PRIVATE))
{
ret = EINVAL;
}
else
{
attr->pshared = pshared;
}
return ret;
}
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