forked from Archive/PX4-Autopilot
111 lines
4.0 KiB
C
111 lines
4.0 KiB
C
/****************************************************************************
|
|
* lib/time/lib_time.c
|
|
*
|
|
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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 <time.h>
|
|
|
|
#ifndef CONFIG_DISABLE_CLOCK
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Function: time
|
|
*
|
|
* Description:
|
|
* Get the current calendar time as a time_t object. The function returns
|
|
* this value, and if the argument is not a null pointer, the value is also
|
|
* set to the object pointed by tloc.
|
|
*
|
|
* Note that this function is just a thin wrapper around gettimeofday()
|
|
* and is provided for compatibility. gettimeofday() is the preffered way
|
|
* to obtain system time.
|
|
*
|
|
* Parameters:
|
|
* Pointer to an object of type time_t, where the time value is stored.
|
|
* Alternativelly, this parameter can be a null pointer, in which case the
|
|
* parameter is not used, but a time_t object is still returned by the
|
|
* function.
|
|
*
|
|
* Return Value:
|
|
* The current calendar time as a time_t object. If the argument is not
|
|
* a null pointer, the return value is the same as the one stored in the
|
|
* location pointed by the argument.
|
|
*
|
|
* If the function could not retrieve the calendar time, it returns a -1
|
|
* value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
time_t time(time_t *tloc)
|
|
{
|
|
struct timeval tp;
|
|
int ret;
|
|
|
|
/* Get the current time from the system */
|
|
|
|
ret = gettimeofday(&tp, NULL);
|
|
if (ret == OK)
|
|
{
|
|
/* Return the seconds since the epoch */
|
|
|
|
if (tloc)
|
|
{
|
|
*tloc = tp.tv_sec;
|
|
}
|
|
|
|
return tp.tv_sec;
|
|
}
|
|
|
|
return (time_t)ERROR;
|
|
}
|
|
|
|
#endif /* !CONFIG_DISABLE_CLOCK */
|