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rAKA akantu
aka_timer.hh
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/**
* @file aka_timer.hh
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date creation: Fri Jan 04 2013
* @date last modification: Tue Jun 17 2014
*
* @brief timer object
*
* @section LICENSE
*
* Copyright (©) 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_TIMER_HH__
#define __AKANTU_TIMER_HH__
#include <cmath>
#include <limits>
#include <ctime>
#include <sys/time.h>
__BEGIN_AKANTU__
// time_t tv_sec; /* seconds since Jan. 1, 1970 */
// suseconds_t tv_usec; /* and microseconds */
// time_t -> long
// suseconds_t -> __int32_t
using
std
::
cout
;
using
std
::
endl
;
class
time
{
typedef
std
::
time_t
time_t
;
time_t
microseconds_
;
time_t
seconds_
;
time_t
minutes_
;
time_t
hours_
;
time_t
days_
;
public
:
explicit
time
(
const
timeval
&
t
)
:
microseconds_
(
t
.
tv_usec
),
seconds_
(
t
.
tv_sec
),
minutes_
(),
hours_
(),
days_
()
{
adjust
();
}
explicit
time
(
time_t
ms
=
0
,
time_t
s
=
0
,
time_t
min
=
0
,
time_t
h
=
0
,
time_t
d
=
0
)
:
microseconds_
(
ms
),
seconds_
(
s
),
minutes_
(
min
),
hours_
(
h
),
days_
(
d
)
{
adjust
();
}
time
&
operator
+=
(
const
timeval
&
t
)
{
microseconds_
+=
t
.
tv_usec
;
seconds_
+=
t
.
tv_sec
;
adjust
();
return
*
this
;
}
time
&
operator
+=
(
const
time
&
t
)
{
microseconds_
+=
t
.
microseconds_
;
seconds_
+=
t
.
seconds_
;
minutes_
+=
t
.
minutes_
;
hours_
+=
t
.
hours_
;
days_
+=
t
.
days_
;
adjust
();
return
*
this
;
}
time
operator
+
(
const
time
&
t2
)
{
time
t
(
*
this
);
t
+=
t2
;
return
t
;
}
friend
std
::
ostream
&
operator
<<
(
std
::
ostream
&
os
,
const
time
&
t
)
{
if
(
t
.
days_
!=
0
)
os
<<
t
.
days_
<<
" d, "
;
if
(
t
.
hours_
!=
0
)
os
<<
t
.
hours_
<<
" h, "
;
if
(
t
.
minutes_
!=
0
)
os
<<
t
.
minutes_
<<
" m, "
;
if
(
t
.
seconds_
!=
0
)
os
<<
t
.
seconds_
<<
" s, "
;
os
<<
t
.
microseconds_
<<
" µs"
;
return
os
;
}
private
:
void
adjust
()
{
if
(
microseconds_
>=
1000000
)
{
seconds_
+=
microseconds_
/
1000000
;
microseconds_
=
microseconds_
%
1000000
;
}
if
(
seconds_
>=
60
)
{
minutes_
+=
seconds_
/
60
;
seconds_
=
seconds_
%
60
;
}
if
(
minutes_
>=
60
)
{
hours_
+=
minutes_
/
60
;
minutes_
=
minutes_
%
60
;
}
if
(
hours_
>=
24
)
{
days_
+=
hours_
/
24
;
hours_
=
hours_
%
24
;
}
}
};
///////////////////////////////////////////////////////////////////////////////
// timer classes
template
<
typename
timeval
>
void
subtract
(
const
timeval
&
x
,
timeval
y
,
timeval
&
r
)
{
// perform the carry for the later subtraction by updating y
if
(
x
.
tv_usec
<
y
.
tv_usec
)
{
int
nsec
=
(
y
.
tv_usec
-
x
.
tv_usec
)
/
1000000
+
1
;
y
.
tv_usec
-=
1000000
*
nsec
;
y
.
tv_sec
+=
nsec
;
}
if
(
x
.
tv_usec
-
y
.
tv_usec
>
1000000
)
{
int
nsec
=
(
x
.
tv_usec
-
y
.
tv_usec
)
/
1000000
;
y
.
tv_usec
+=
1000000
*
nsec
;
y
.
tv_sec
-=
nsec
;
}
// compute the time remaining to wait
// tv_usec is certainly positive
r
.
tv_sec
=
x
.
tv_sec
-
y
.
tv_sec
;
r
.
tv_usec
=
x
.
tv_usec
-
y
.
tv_usec
;
}
class
ctimer
{
timeval
t1_
;
public
:
ctimer
()
{
reset
();
}
timeval
tac
()
const
{
timeval
t2
;
gettimeofday
(
&
t2
,
NULL
);
timeval
r
;
subtract
(
t2
,
t1_
,
r
);
return
r
;
}
inline
void
reset
()
{
gettimeofday
(
&
t1_
,
NULL
);
}
friend
std
::
ostream
&
operator
<<
(
std
::
ostream
&
os
,
const
ctimer
&
t
)
{
cout
<<
time
(
t
.
tac
());
return
os
;
}
};
class
cpu_timer
{
std
::
clock_t
t1_
;
public
:
cpu_timer
()
:
t1_
(
std
::
clock
())
{}
std
::
clock_t
tac
()
const
{
return
std
::
clock
()
-
t1_
;
}
inline
void
reset
()
{
t1_
=
std
::
clock
();
}
inline
double
seconds
()
{
return
static_cast
<
double
>
(
tac
())
/
CLOCKS_PER_SEC
;
}
friend
std
::
ostream
&
operator
<<
(
std
::
ostream
&
os
,
const
cpu_timer
&
t
)
{
os
<<
t
.
tac
();
return
os
;
}
};
__END_AKANTU__
#endif
/* __AKANTU_TIMER_HH__ */
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