nuttx/libs/libc/pthread/pthread_mutexattr_init.c

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/****************************************************************************
* libs/libc/pthread/pthread_mutexattr_init.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include <debug.h>
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: pthread_mutexattr_init
*
* Description:
* Create mutex attributes.
*
* Input Parameters:
* attr
*
* Returned Value:
* 0 if successful. Otherwise, an error code.
*
* Assumptions:
*
****************************************************************************/
int pthread_mutexattr_init(FAR pthread_mutexattr_t *attr)
{
int ret = OK;
linfo("attr=0x%p\n", attr);
if (!attr)
{
ret = EINVAL;
}
else
{
attr->pshared = 0;
#ifdef CONFIG_PRIORITY_INHERITANCE
# ifdef PTHREAD_MUTEX_DEFAULT_PRIO_INHERIT
attr->proto = PTHREAD_PRIO_INHERIT;
# else
attr->proto = PTHREAD_PRIO_NONE;
# endif
#endif /* CONFIG_PRIORITY_INHERITANCE */
#ifdef CONFIG_PTHREAD_MUTEX_TYPES
attr->type = PTHREAD_MUTEX_DEFAULT;
#endif
#ifdef CONFIG_PTHREAD_MUTEX_BOTH
#ifdef CONFIG_PTHREAD_MUTEX_DEFAULT_UNSAFE
attr->robust = PTHREAD_MUTEX_STALLED;
#else
attr->robust = PTHREAD_MUTEX_ROBUST;
#endif
#endif
}
linfo("Returning %d\n", ret);
return ret;
}