1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192 |
- /****************************************************************************
- * net/utils/net_timeval2dsec.c
- *
- * Copyright (C) 2007, 2008, 2014-2015 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/time.h>
- #include <nuttx/clock.h>
- #include "utils/utils.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: net_timeval2dsec
- *
- * Description:
- * Convert a struct timeval to deciseconds. Needed by setsockopt() to
- * save new timeout values.
- *
- * Input Parameters:
- * tv - The struct timeval to convert
- * remainder - Determines how to handler the microsecond remainder
- *
- * Returned Value:
- * The converted value
- *
- * Assumptions:
- *
- ****************************************************************************/
- unsigned int net_timeval2dsec(FAR struct timeval *tv,
- enum tv2ds_remainder_e remainder)
- {
- unsigned long adjust = 0;
- switch (remainder)
- {
- default:
- case TV2DS_TRUNC: /* Truncate microsecond remainder */
- break;
- case TV2DS_ROUND: /* Round to the nearest full decisecond */
- adjust = (USEC_PER_DSEC / 2);
- break;
- case TV2DS_CEIL: /* Force to next larger full decisecond */
- adjust = (USEC_PER_DSEC - 1);
- break;
- }
- return (unsigned int)(tv->tv_sec * DSEC_PER_SEC +
- (tv->tv_usec + adjust) / USEC_PER_DSEC);
- }
|