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/* The use of the struct timezone is obsolete; the tz argument should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