mirror of
https://github.com/apache/nuttx.git
synced 2026-05-22 13:52:22 +08:00
ouyangxiangzhen
4d283260ab
This commit added hrtimer_gettime API to support the query of the rest of the delay time of the hrtimer in nanoseconds. Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
/****************************************************************************
|
|
* sched/hrtimer/hrtimer_gettime.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 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 "hrtimer/hrtimer.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: hrtimer_gettime
|
|
*
|
|
* Description:
|
|
* Get the rest of the delay time of the hrtimer in nanoseconds.
|
|
*
|
|
* Input Parameters:
|
|
* timer - The hrtimer to be queried.
|
|
*
|
|
* Returned Value
|
|
* The time until next expiration in nanoseconds.
|
|
*
|
|
* Assumption:
|
|
* The timer should not be NULL.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint64_t hrtimer_gettime(FAR hrtimer_t *timer)
|
|
{
|
|
uint64_t expire = hrtimer_read_64(&timer->expired);
|
|
int64_t remain = expire - clock_systime_nsec();
|
|
|
|
return remain < 0 ? 0u : remain;
|
|
}
|