nuttx/libs/libc/pthread/pthread_attr_setschedpolicy.c

/****************************************************************************
 * libs/libc/pthread/pthread_attr_setschedpolicy.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 <string.h>
#include <sched.h>
#include <debug.h>
#include <errno.h>

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

/****************************************************************************
 * Name:  pthread_attr_setschedpolicy
 *
 * Description:
 *   Set the scheduling algorithm attribute.
 *
 * Input Parameters:
 *   attr
 *   policy
 *
 * Returned Value:
 *   0 if successful.  Otherwise, an error code.
 *
 * Assumptions:
 *
 ****************************************************************************/

int pthread_attr_setschedpolicy(FAR pthread_attr_t *attr, int policy)
{
  int ret;

  linfo("attr=%p policy=%d\n", attr, policy);

  if (!attr || (policy != SCHED_OTHER
       && policy != SCHED_FIFO
#if CONFIG_RR_INTERVAL > 0
       && policy != SCHED_RR
#endif
#ifdef CONFIG_SCHED_SPORADIC
       && policy != SCHED_SPORADIC
#endif
    ))
    {
      ret = EINVAL;
    }
  else
    {
      attr->policy = policy;
      ret = OK;
    }

  linfo("Returning %d\n", ret);
  return ret;
}