Commit | Line | Data |
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f9356baa | 1 | /* profile.c --- generate periodic events for profiling of Emacs Lisp code. |
ba318903 | 2 | Copyright (C) 1992, 1994, 1999, 2001-2014 Free Software Foundation, |
ab422c4d | 3 | Inc. |
f9356baa | 4 | |
294981c7 | 5 | Author: Boaz Ben-Zvi <boaz@lcs.mit.edu> |
f9356baa | 6 | |
3b7ad313 EN |
7 | This file is part of GNU Emacs. |
8 | ||
294981c7 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
3b7ad313 | 10 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
3b7ad313 EN |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
294981c7 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
f9356baa RS |
21 | |
22 | ||
23 | /** | |
0d23c240 | 24 | ** To be run as an emacs subprocess. Input string that starts with: |
f9356baa RS |
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 | */ | |
d35af63c | 32 | |
00382e8b PE |
33 | #define INLINE EXTERN_INLINE |
34 | #include <config.h> | |
f162bcc3 | 35 | |
d35af63c | 36 | #include <inttypes.h> |
4ee9629e | 37 | #include <stdio.h> |
d35af63c PE |
38 | |
39 | #include <intprops.h> | |
f98d41f5 | 40 | #include <systime.h> |
f9356baa | 41 | |
43aac990 | 42 | static struct timespec TV1; |
f9356baa | 43 | static int watch_not_started = 1; /* flag */ |
d35af63c | 44 | static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "." |
43aac990 | 45 | + LOG10_TIMESPEC_RESOLUTION]; |
f9356baa RS |
46 | |
47 | /* Reset the stopwatch to zero. */ | |
48 | ||
b23b5a5b | 49 | static void |
873fbd0b | 50 | reset_watch (void) |
f9356baa | 51 | { |
43aac990 | 52 | TV1 = current_timespec (); |
f9356baa RS |
53 | watch_not_started = 0; |
54 | } | |
55 | ||
56 | /* This call returns the time since the last reset_watch call. The time | |
d35af63c | 57 | is returned as a string with the format <seconds>.<nanoseconds> |
1c1fce3f | 58 | If reset_watch was not called yet, exit. */ |
f9356baa | 59 | |
b23b5a5b | 60 | static char * |
873fbd0b | 61 | get_time (void) |
f9356baa | 62 | { |
43aac990 PE |
63 | struct timespec TV2 = timespec_sub (current_timespec (), TV1); |
64 | uintmax_t s = TV2.tv_sec; | |
65 | int ns = TV2.tv_nsec; | |
f9356baa | 66 | if (watch_not_started) |
65396510 | 67 | exit (EXIT_FAILURE); /* call reset_watch first ! */ |
43aac990 | 68 | sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_TIMESPEC_RESOLUTION, ns); |
f9356baa RS |
69 | return time_string; |
70 | } | |
79dbff47 | 71 | \f |
d0dff6e5 | 72 | int |
873fbd0b | 73 | main (void) |
f9356baa | 74 | { |
1c1fce3f KH |
75 | int c; |
76 | while ((c = getchar ()) != EOF) | |
f9356baa | 77 | { |
1c1fce3f | 78 | switch (c) |
f9356baa RS |
79 | { |
80 | case 'z': | |
81 | reset_watch (); | |
82 | break; | |
83 | case 'p': | |
84 | puts (get_time ()); | |
85 | break; | |
86 | case 'q': | |
65396510 | 87 | exit (EXIT_SUCCESS); |
f9356baa | 88 | } |
1c1fce3f KH |
89 | /* Anything remaining on the line is ignored. */ |
90 | while (c != '\n' && c != EOF) | |
91 | c = getchar (); | |
f9356baa | 92 | } |
65396510 | 93 | exit (EXIT_FAILURE); |
f9356baa | 94 | } |
ab5796a9 | 95 | |
65396510 TTN |
96 | |
97 | /* profile.c ends here */ |