138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/****************************************************************************
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* include/sys/time.h
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*
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* Copyright (C) 2009, 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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#ifndef __INCLUDE_SYS_TIME_H
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#define __INCLUDE_SYS_TIME_H
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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 <time.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/* struct timeval represents time as seconds plus microseconds */
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struct timeval
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{
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time_t tv_sec; /* Seconds */
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long tv_usec; /* Microseconds */
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};
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/* The use of the struct timezone is obsolete; the tz argument should
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* normally be specified as NULL (and is ignored in any event).
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*/
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struct timezone
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{
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int tz_minuteswest; /* Minutes west of Greenwich */
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int tz_dsttime; /* Type of DST correction */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: gettimeofday
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*
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* Description:
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* Get the current time
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*
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* Conforming to SVr4, 4.3BSD. POSIX.1-2001 describes gettimeofday().
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* POSIX.1-2008 marks gettimeofday() as obsolete, recommending the use of
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* clock_gettime(2) instead.
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*
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* NuttX implements gettimeofday() as a thin layer around clock_gettime();
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*
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* Input Parameters:
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* tv - The location to return the current time
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* tz - Ignored
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*
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* Returned value:
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* Zero (OK) on success; -1 is returned on failure with the errno variable
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* set appropriately.
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*
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****************************************************************************/
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int gettimeofday(FAR struct timeval *tv, FAR struct timezone *tz);
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/****************************************************************************
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* Name: settimeofday
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*
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* Description:
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* Set the current time
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*
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* Conforming to SVr4, 4.3BSD. POSIX.1-2001 describes gettimeofday() but
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* not settimeofday().
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*
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* NuttX implements settimeofday() as a thin layer around clock_settime();
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*
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* Input Parameters:
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* tv - The net to time to be set
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* tz - Ignored
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*
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* Returned value:
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* Zero (OK) on success; -1 is returned on failure with the errno variable
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* set appropriately.
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*
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****************************************************************************/
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int settimeofday(FAR const struct timeval *tv, FAR struct timezone *tz);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYS_TIME_H */
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