78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/****************************************************************************
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* sched/clock/clock_getres.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <time.h>
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#include <errno.h>
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#include <debug.h>
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#include "clock/clock.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: clock_getres
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*
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* Description:
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* Clock Functions based on POSIX APIs
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*
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****************************************************************************/
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int clock_getres(clockid_t clock_id, struct timespec *res)
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{
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int ret = OK;
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sinfo("clock_id=%d\n", clock_id);
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switch (clock_id)
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{
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default:
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serr("Returning ERROR\n");
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set_errno(EINVAL);
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ret = ERROR;
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break;
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#ifdef CONFIG_CLOCK_MONOTONIC
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case CLOCK_MONOTONIC:
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case CLOCK_BOOTTIME:
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#endif
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case CLOCK_REALTIME:
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/* Form the timspec using clock resolution in nanoseconds */
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res->tv_sec = 0;
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res->tv_nsec = NSEC_PER_TICK;
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sinfo("Returning res=(%d,%d)\n", (int)res->tv_sec,
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(int)res->tv_nsec);
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break;
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}
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return ret;
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}
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