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Add gettimeofday()

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1974 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2009-07-11 23:39:33 +00:00
parent 631788ece1
commit 4f255b5fdf
6 changed files with 220 additions and 1 deletions
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2
ChangeLog
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@ -808,6 +808,8 @@
* lib/: Greatly simplified mktime() and gmtime_r(). The Gregorian and
Julian time calculations were interesting, but not necessary in the
typical embeddd system.
* sched/: Added gettimeofday(). This implementation is simply a thin
wrapper around clock_gettimer().

2
Documentation/NuttX.html
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@ -1481,6 +1481,8 @@ nuttx-0.4.10 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
* lib/: Greatly simplified mktime() and gmtime_r(). The Gregorian and
Julian time calculations were interesting, but not necessary in the
typical embeddd system.
* sched/: Added gettimeofday(). This implementation is simply a thin
wrapper around clock_gettimer().
nuttx-0.4.10 2009-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>

28
Documentation/NuttxUserGuide.html
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@ -2469,6 +2469,7 @@ VxWorks provides the following comparable interface:
<li><a href="#timersettime">2.7.9 timer_settime</a></li>
<li><a href="#timergettime">2.7.10 timer_gettime</a></li>
<li><a href="#timergetoverrun">2.7.11 timer_getoverrun</a></li>
<li><a href="#gettimeofday">2.7.12 gettimeofday</a></li>
</ul>
<H3><a name="clocksettime">2.7.1 clock_settime</a></H3>
@ -2917,6 +2918,33 @@ VxWorks provides the following comparable interface:
interface of the same name.
</p>
<h3><a name="gettimeofday">2.7.12 gettimeofday</a></h3>
<p>
<b>Function Prototype:</b>
</p>
<pre>
#include &lt;sys/time.h&gt;
int gettimeofday(struct timeval *tp, void *tzp);
</pre>
<p>
<b>Description:</b>
This implementation of <code>gettimeofday()</code> is simply a thin wrapper around
<a href="#clockgettime"><code>clock_gettime()</code></a>.
It simply calls <code>clock_gettime()</code> using the <code>CLOCK_REALTIME</code> timer and
converts the result to the required <code>struct timeval</code>.
</p>
<p>
<b>Input Parameters:</b>
</p>
<ul>
<li><code>tp</code>. The current time will be returned to this user provided location.</li>
<li><code>tzp</code>. A reference to the timezone -- <i>IGNORED</i>.</li>
</ul>
<p>
<b>Returned Values:</b>
See <a href="#clockgettime"><code>clock_gettime()</code></a>.
</p>
<table width ="100%">
<tr bgcolor="#e4e4e4">
<td>

75
include/sys/time.h Normal file
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@ -0,0 +1,75 @@
/****************************************************************************
* include/sys/time.h
*
* Copyright (C) 2009 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.
*
****************************************************************************/
#ifndef __SYS_MMAN_H
#define __SYS_MMAN_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <time.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
EXTERN int gettimeofday(struct timeval *tp, void *tzp);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __SYS_MMAN_H */

3
sched/Makefile
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@ -72,7 +72,8 @@ ifneq ($(CONFIG_DISABLE_SIGNALS),y)
TIME_SRCS += sleep.c usleep.c
endif
CLOCK_SRCS = clock_initialize.c clock_settime.c clock_gettime.c clock_getres.c \
clock_time2ticks.c clock_abstime2ticks.c clock_ticks2time.c
clock_time2ticks.c clock_abstime2ticks.c clock_ticks2time.c \
clock_gettimeofday.c
SIGNAL_SRCS = sig_initialize.c \
sig_action.c sig_procmask.c sig_pending.c sig_suspend.c \

111
sched/clock_gettimeofday.c Normal file
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@ -0,0 +1,111 @@
/****************************************************************************
* sched/clock_gettimeofday.c
*
* Copyright (C) 2009 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 <sys/types.h>
#include <sys/time.h>
#include <errno.h>
#include <debug.h>
#include "clock_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/**************************************************************************
* Public Constant Data
**************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/**************************************************************************
* Private Variables
**************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: gettimeofday
*
* Description:
* Get the current time
*
****************************************************************************/
int gettimeofday(struct timeval *tp, void *tzp)
{
struct timespec ts;
int ret;
#ifdef CONFIG_DEBUG
if (!tp)
{
errno = EINVAL;
return ERROR;
}
#endif
/* Let clock_gettime do most of the work */
ret = clock_gettime(CLOCK_REALTIME, &ts);
if (ret == OK)
{
/* Convert the struct timespec to a struct timeval */
tp->tv_sec = ts.tv_sec;
tp->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
}
return ret;
}