80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/****************************************************************************
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* net/utils/net_timeval2dsec.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <sys/time.h>
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#include <nuttx/clock.h>
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#include "utils/utils.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: net_timeval2dsec
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*
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* Description:
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* Convert a struct timeval to deciseconds. Needed by setsockopt() to
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* save new timeout values.
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*
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* Input Parameters:
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* tv - The struct timeval to convert
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* remainder - Determines how to handler the microsecond remainder
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*
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* Returned Value:
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* The converted value
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*
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* Assumptions:
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*
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****************************************************************************/
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unsigned int net_timeval2dsec(FAR struct timeval *tv,
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enum tv2ds_remainder_e remainder)
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{
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unsigned long adjust = 0;
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switch (remainder)
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{
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default:
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case TV2DS_TRUNC: /* Truncate microsecond remainder */
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break;
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case TV2DS_ROUND: /* Round to the nearest full decisecond */
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adjust = (USEC_PER_DSEC / 2);
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break;
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case TV2DS_CEIL: /* Force to next larger full decisecond */
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adjust = (USEC_PER_DSEC - 1);
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break;
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}
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return (unsigned int)(tv->tv_sec * DSEC_PER_SEC +
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(tv->tv_usec + adjust) / USEC_PER_DSEC);
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}
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