nuttx/libs/libc/semaphore/sem_getprotocol.c

/****************************************************************************
 * libs/libc/semaphore/sem_getprotocol.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 <assert.h>

#include <nuttx/semaphore.h>

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: sem_getprotocol
 *
 * Description:
 *    Return the value of the semaphore protocol attribute.
 *
 * Input Parameters:
 *    sem      - A pointer to the semaphore whose attributes are to be
 *               queried.
 *    protocol - The user provided location in which to store the protocol
 *               value.
 *
 * Returned Value:
 *   This function is exposed as a non-standard application interface.  It
 *   returns zero (OK).  Otherwise, an error code.
 *
 ****************************************************************************/

int sem_getprotocol(FAR sem_t *sem, FAR int *protocol)
{
  DEBUGASSERT(sem != NULL && protocol != NULL);

#ifdef CONFIG_PRIORITY_INHERITANCE
  if ((sem->flags & PRIOINHERIT_FLAGS_DISABLE) != 0)
    {
      *protocol = SEM_PRIO_NONE;
    }
  else
    {
      *protocol = SEM_PRIO_INHERIT;
    }

#else
  *protocol = SEM_PRIO_NONE;
#endif

  return OK;
}