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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; | |
f9356baa RS |
37 | static int watch_not_started = 1; /* flag */ |
38 | static char time_string[30]; | |
39 | ||
40 | /* Reset the stopwatch to zero. */ | |
41 | ||
340ff9de | 42 | void |
f9356baa RS |
43 | reset_watch () |
44 | { | |
72ddb82c | 45 | EMACS_GET_TIME (TV1); |
f9356baa RS |
46 | watch_not_started = 0; |
47 | } | |
48 | ||
49 | /* This call returns the time since the last reset_watch call. The time | |
50 | is returned as a string with the format <seconds>.<micro-seconds> | |
1c1fce3f | 51 | If reset_watch was not called yet, exit. */ |
f9356baa RS |
52 | |
53 | char * | |
54 | get_time () | |
55 | { | |
f9356baa | 56 | if (watch_not_started) |
1c1fce3f | 57 | exit (1); /* call reset_watch first ! */ |
72ddb82c | 58 | EMACS_GET_TIME (TV2); |
f9356baa RS |
59 | if (TV1.tv_usec > TV2.tv_usec) |
60 | { | |
61 | TV2.tv_usec += 1000000; | |
62 | TV2.tv_sec--; | |
63 | } | |
bae98299 | 64 | sprintf (time_string, "%lu.%06lu", |
f9356baa | 65 | TV2.tv_sec - TV1.tv_sec, TV2.tv_usec - TV1.tv_usec); |
f9356baa RS |
66 | return time_string; |
67 | } | |
68 | ||
69 | void | |
70 | main () | |
71 | { | |
1c1fce3f KH |
72 | int c; |
73 | while ((c = getchar ()) != EOF) | |
f9356baa | 74 | { |
1c1fce3f | 75 | switch (c) |
f9356baa RS |
76 | { |
77 | case 'z': | |
78 | reset_watch (); | |
79 | break; | |
80 | case 'p': | |
81 | puts (get_time ()); | |
82 | break; | |
83 | case 'q': | |
84 | exit (0); | |
85 | } | |
1c1fce3f KH |
86 | /* Anything remaining on the line is ignored. */ |
87 | while (c != '\n' && c != EOF) | |
88 | c = getchar (); | |
f9356baa | 89 | } |
bae98299 | 90 | exit (1); |
f9356baa | 91 | } |