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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 | ||
c01fd077 RS |
41 | #ifndef HAVE_GETTIMEOFDAY |
42 | gettimeofday () | |
43 | { | |
44 | fprintf (stderr, "profile: this system does not support gettimeofday\n"); | |
45 | exit (1); | |
46 | } | |
47 | #endif | |
48 | ||
f9356baa RS |
49 | /* Reset the stopwatch to zero. */ |
50 | ||
51 | int | |
52 | reset_watch () | |
53 | { | |
54 | gettimeofday (&TV1, tzp); | |
55 | watch_not_started = 0; | |
56 | } | |
57 | ||
58 | /* This call returns the time since the last reset_watch call. The time | |
59 | is returned as a string with the format <seconds>.<micro-seconds> | |
1c1fce3f | 60 | If reset_watch was not called yet, exit. */ |
f9356baa RS |
61 | |
62 | char * | |
63 | get_time () | |
64 | { | |
f9356baa | 65 | if (watch_not_started) |
1c1fce3f | 66 | exit (1); /* call reset_watch first ! */ |
f9356baa RS |
67 | gettimeofday (&TV2, tzp); |
68 | if (TV1.tv_usec > TV2.tv_usec) | |
69 | { | |
70 | TV2.tv_usec += 1000000; | |
71 | TV2.tv_sec--; | |
72 | } | |
bae98299 | 73 | sprintf (time_string, "%lu.%06lu", |
f9356baa | 74 | TV2.tv_sec - TV1.tv_sec, TV2.tv_usec - TV1.tv_usec); |
f9356baa RS |
75 | return time_string; |
76 | } | |
77 | ||
78 | void | |
79 | main () | |
80 | { | |
1c1fce3f KH |
81 | int c; |
82 | while ((c = getchar ()) != EOF) | |
f9356baa | 83 | { |
1c1fce3f | 84 | switch (c) |
f9356baa RS |
85 | { |
86 | case 'z': | |
87 | reset_watch (); | |
88 | break; | |
89 | case 'p': | |
90 | puts (get_time ()); | |
91 | break; | |
92 | case 'q': | |
93 | exit (0); | |
94 | } | |
1c1fce3f KH |
95 | /* Anything remaining on the line is ignored. */ |
96 | while (c != '\n' && c != EOF) | |
97 | c = getchar (); | |
f9356baa | 98 | } |
bae98299 | 99 | exit (1); |
f9356baa | 100 | } |