93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/****************************************************************************
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* net/utils/net_timeval2dsec.c
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*
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* Copyright (C) 2007, 2008, 2014-2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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