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ecos: crisper implementation of timeval_ms() 

A crisper/faster implementation under eCos that makes profiling a
tad easier.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
__archive__
Øyvind Harboe 2009-12-15 14:57:38 +01:00
parent 74ce435d97
commit c8b8a34bb5
4 changed files with 87 additions and 13 deletions
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4
src/helper/Makefile.am
View File

@ -7,9 +7,9 @@ METASOURCES = AUTO
noinst_LTLIBRARIES = libhelper.la
if ECOSBOARD
CONFIGFILES =
CONFIGFILES = time_support_ecos.c
else
CONFIGFILES = options.c jim.c jim-eventloop.c
CONFIGFILES = options.c jim.c jim-eventloop.c time_support_common.c
endif

11
src/helper/time_support.c
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@ -29,7 +29,6 @@
#include "time_support.h"
/* calculate difference between two struct timeval values */
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
{
@ -73,16 +72,6 @@ int timeval_add_time(struct timeval *result, long sec, long usec)
return 0;
}
int64_t timeval_ms()
{
struct timeval now;
int retval = gettimeofday(&now, NULL);
if (retval < 0)
return retval;
return (int64_t)now.tv_sec * 1000 + now.tv_usec / 1000;
}
int duration_start(struct duration *duration)
{
return gettimeofday(&duration->start, NULL);

42
src/helper/time_support_common.c Normal file
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@ -0,0 +1,42 @@
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "time_support.h"
/* simple and low overhead fetching of ms counter. Use only
* the difference between ms counters returned from this fn.
*/
int64_t timeval_ms()
{
struct timeval now;
int retval = gettimeofday(&now, NULL);
if (retval < 0)
return retval;
return (int64_t)now.tv_sec * 1000 + now.tv_usec / 1000;
}

43
src/helper/time_support_ecos.c Normal file
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@ -0,0 +1,43 @@
/***************************************************************************
* Copyright (C) 2006 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "time_support.h"
#include <cyg/kernel/kapi.h>
int64_t timeval_ms()
{
/* Faster/less noisy implementation of getting ms when
* profiling
*/
static const int ms_per_tick =
(CYGNUM_HAL_RTC_NUMERATOR / CYGNUM_HAL_RTC_DENOMINATOR) / 1000000;
cyg_tick_count_t cur_time = cyg_current_time();
return ((int)cur_time) * ms_per_tick;
}