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f9356baa RS |
1 | /* profile.c --- generate periodic events for profiling of Emacs Lisp code. |
2 | Copyright (C) 1992, 1994 Free Software Foundation, Inc. | |
3 | ||
4 | Author: Boaz Ben-Zvi <boaz@lcs.mit.edu> | |
5 | ||
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | ||
23 | /** | |
24 | ** To be run as an emacs process. Input string that starts with: | |
25 | ** 'z' -- resets the watch (to zero). | |
26 | ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec> | |
27 | ** 'q' -- exit. | |
28 | ** | |
29 | ** abstraction : a stopwatch | |
30 | ** operations: reset_watch, get_time | |
31 | */ | |
32 | #include <stdio.h> | |
33 | #include <../src/config.h> | |
34 | #include <../src/systime.h> | |
35 | ||
36 | static struct timeval TV1, TV2; | |
37 | static struct timezone *tzp = (struct timezone *) NULL; /* no need timezone */ | |
38 | static int watch_not_started = 1; /* flag */ | |
39 | static char time_string[30]; | |
40 | ||
41 | /* Reset the stopwatch to zero. */ | |
42 | ||
43 | int | |
44 | reset_watch () | |
45 | { | |
46 | gettimeofday (&TV1, tzp); | |
47 | watch_not_started = 0; | |
48 | } | |
49 | ||
50 | /* This call returns the time since the last reset_watch call. The time | |
51 | is returned as a string with the format <seconds>.<micro-seconds> | |
52 | If reset_watch was not called yet, return NULL. */ | |
53 | ||
54 | char * | |
55 | get_time () | |
56 | { | |
57 | char *result = time_string; | |
58 | int i; | |
59 | if (watch_not_started) | |
60 | return ((char *) 0); /* call reset_watch first ! */ | |
61 | gettimeofday (&TV2, tzp); | |
62 | if (TV1.tv_usec > TV2.tv_usec) | |
63 | { | |
64 | TV2.tv_usec += 1000000; | |
65 | TV2.tv_sec--; | |
66 | } | |
67 | sprintf (result,"%lu.%6lu", | |
68 | TV2.tv_sec - TV1.tv_sec, TV2.tv_usec - TV1.tv_usec); | |
69 | for (result = index (result, '.') + 1; *result == ' '; result++) | |
70 | *result = '0'; | |
71 | return time_string; | |
72 | } | |
73 | ||
74 | void | |
75 | main () | |
76 | { | |
77 | char inp[10]; | |
78 | while (1) | |
79 | { | |
80 | gets (inp); | |
81 | switch (inp[0]) | |
82 | { | |
83 | case 'z': | |
84 | reset_watch (); | |
85 | break; | |
86 | case 'p': | |
87 | puts (get_time ()); | |
88 | break; | |
89 | case 'q': | |
90 | exit (0); | |
91 | } | |
92 | } | |
93 | } |