blob: daf0c00a5d0d7cbc0ec86986b59b0505c2b2dde6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*************************************************************************
* Copyright (C) 2009-2010 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library 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. *
* *
* The Dimension Library 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 this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Performance counter.
*/
#include "dimension.h"
#include <sys/times.h>
#include <unistd.h>
/** Clock ticks per second. */
static long clk_tck = 0;
dmnsn_timer *
dmnsn_new_timer()
{
/* Figure out the clock ticks per second */
if (!clk_tck) {
clk_tck = sysconf(_SC_CLK_TCK);
if (clk_tck == -1) {
dmnsn_error(DMNSN_SEVERITY_MEDIUM, "sysconf(_SC_CLK_TCK) failed.");
clk_tck = 1000000L;
}
}
dmnsn_timer *timer = dmnsn_malloc(sizeof(dmnsn_timer));
struct tms buf;
clock_t real = times(&buf);
timer->real = (double)real/clk_tck;
timer->user = (double)buf.tms_utime/clk_tck;
timer->system = (double)buf.tms_stime/clk_tck;
return timer;
}
void
dmnsn_complete_timer(dmnsn_timer *timer)
{
struct tms buf;
clock_t real = times(&buf);
timer->real = (double)real/clk_tck - timer->real;
timer->user = (double)buf.tms_utime/clk_tck - timer->user;
timer->system = (double)buf.tms_stime/clk_tck - timer->system;
}
void
dmnsn_delete_timer(dmnsn_timer *timer)
{
dmnsn_free(timer);
}
|
