112 lines
4.6 KiB
C
112 lines
4.6 KiB
C
/********************************************************************************
|
|
* libc/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>
|
|
|
|
/********************************************************************************
|
|
* Pre-processor 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;
|
|
}
|