Commit | Line | Data |
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f9356baa | 1 | /* profile.c --- generate periodic events for profiling of Emacs Lisp code. |
acaf905b | 2 | Copyright (C) 1992, 1994, 1999, 2001-2012 Free Software Foundation, Inc. |
f9356baa | 3 | |
294981c7 | 4 | Author: Boaz Ben-Zvi <boaz@lcs.mit.edu> |
f9356baa | 5 | |
3b7ad313 EN |
6 | This file is part of GNU Emacs. |
7 | ||
294981c7 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
3b7ad313 | 9 | it under the terms of the GNU General Public License as published by |
294981c7 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
3b7ad313 EN |
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 | |
294981c7 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
f9356baa RS |
20 | |
21 | ||
22 | /** | |
0d23c240 | 23 | ** To be run as an emacs subprocess. Input string that starts with: |
f9356baa RS |
24 | ** 'z' -- resets the watch (to zero). |
25 | ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec> | |
26 | ** 'q' -- exit. | |
27 | ** | |
28 | ** abstraction : a stopwatch | |
29 | ** operations: reset_watch, get_time | |
30 | */ | |
f98d41f5 | 31 | #include <config.h> |
d35af63c | 32 | |
f162bcc3 PE |
33 | #define SYSTIME_INLINE EXTERN_INLINE |
34 | ||
d35af63c | 35 | #include <inttypes.h> |
4ee9629e | 36 | #include <stdio.h> |
d35af63c PE |
37 | |
38 | #include <intprops.h> | |
f98d41f5 | 39 | #include <systime.h> |
f9356baa | 40 | |
e9a9ae03 | 41 | static EMACS_TIME TV1; |
f9356baa | 42 | static int watch_not_started = 1; /* flag */ |
d35af63c PE |
43 | static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "." |
44 | + LOG10_EMACS_TIME_RESOLUTION]; | |
f9356baa RS |
45 | |
46 | /* Reset the stopwatch to zero. */ | |
47 | ||
b23b5a5b | 48 | static void |
873fbd0b | 49 | reset_watch (void) |
f9356baa | 50 | { |
e9a9ae03 | 51 | TV1 = current_emacs_time (); |
f9356baa RS |
52 | watch_not_started = 0; |
53 | } | |
54 | ||
55 | /* This call returns the time since the last reset_watch call. The time | |
d35af63c | 56 | is returned as a string with the format <seconds>.<nanoseconds> |
1c1fce3f | 57 | If reset_watch was not called yet, exit. */ |
f9356baa | 58 | |
b23b5a5b | 59 | static char * |
873fbd0b | 60 | get_time (void) |
f9356baa | 61 | { |
e9a9ae03 PE |
62 | EMACS_TIME TV2 = sub_emacs_time (current_emacs_time (), TV1); |
63 | uintmax_t s = EMACS_SECS (TV2); | |
64 | int ns = EMACS_NSECS (TV2); | |
f9356baa | 65 | if (watch_not_started) |
65396510 | 66 | exit (EXIT_FAILURE); /* call reset_watch first ! */ |
d35af63c | 67 | sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_EMACS_TIME_RESOLUTION, ns); |
f9356baa RS |
68 | return time_string; |
69 | } | |
79dbff47 | 70 | \f |
d0dff6e5 | 71 | int |
873fbd0b | 72 | main (void) |
f9356baa | 73 | { |
1c1fce3f KH |
74 | int c; |
75 | while ((c = getchar ()) != EOF) | |
f9356baa | 76 | { |
1c1fce3f | 77 | switch (c) |
f9356baa RS |
78 | { |
79 | case 'z': | |
80 | reset_watch (); | |
81 | break; | |
82 | case 'p': | |
83 | puts (get_time ()); | |
84 | break; | |
85 | case 'q': | |
65396510 | 86 | exit (EXIT_SUCCESS); |
f9356baa | 87 | } |
1c1fce3f KH |
88 | /* Anything remaining on the line is ignored. */ |
89 | while (c != '\n' && c != EOF) | |
90 | c = getchar (); | |
f9356baa | 91 | } |
65396510 | 92 | exit (EXIT_FAILURE); |
f9356baa | 93 | } |
ab5796a9 | 94 | |
65396510 TTN |
95 | |
96 | /* profile.c ends here */ |