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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/* profile.c --- generate periodic events for profiling of Emacs Lisp code.
Copyright (C) 1992, 1994, 1999, 2001-2015 Free Software Foundation,
Inc.
Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or
(at your option) any later version.
GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
/**
** To be run as an emacs subprocess. Input string that starts with:
** 'z' -- resets the watch (to zero).
** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
** 'q' -- exit.
**
** abstraction : a stopwatch
** operations: reset_watch, get_time
*/
#define INLINE EXTERN_INLINE
#include <config.h>
#include <inttypes.h>
#include <stdio.h>
#include <intprops.h>
#include <systime.h>
static struct timespec TV1;
static int watch_not_started = 1; /* flag */
static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "."
+ LOG10_TIMESPEC_RESOLUTION];
/* Reset the stopwatch to zero. */
static void
reset_watch (void)
{
TV1 = current_timespec ();
watch_not_started = 0;
}
/* This call returns the time since the last reset_watch call. The time
is returned as a string with the format <seconds>.<nanoseconds>
If reset_watch was not called yet, exit. */
static char *
get_time (void)
{
struct timespec TV2 = timespec_sub (current_timespec (), TV1);
uintmax_t s = TV2.tv_sec;
int ns = TV2.tv_nsec;
if (watch_not_started)
exit (EXIT_FAILURE); /* call reset_watch first ! */
sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_TIMESPEC_RESOLUTION, ns);
return time_string;
}
int
main (void)
{
int c;
while ((c = getchar ()) != EOF)
{
switch (c)
{
case 'z':
reset_watch ();
break;
case 'p':
puts (get_time ());
break;
case 'q':
exit (EXIT_SUCCESS);
}
/* Anything remaining on the line is ignored. */
while (c != '\n' && c != EOF)
c = getchar ();
}
exit (EXIT_FAILURE);
}
/* profile.c ends here */
|
