nuttx/libs/libc/time/lib_gethrtime.c

/****************************************************************************
 * libs/libc/time/lib_gethrtime.c
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * 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 <sys/time.h>
#include <time.h>

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

/****************************************************************************
 * Name: gethrtime
 *
 * Description:
 *   Get the current time
 *
 * Returned Value:
 *   The current value of the system time in ns
 *
 ****************************************************************************/

hrtime_t gethrtime(void)
{
  struct timespec ts;

  clock_gettime(CLOCK_MONOTONIC, &ts);
  return 1000000000 * ts.tv_sec + ts.tv_nsec;
}