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 PE |
32 | |
33 | #include <inttypes.h> | |
4ee9629e | 34 | #include <stdio.h> |
d35af63c PE |
35 | |
36 | #include <intprops.h> | |
f98d41f5 | 37 | #include <systime.h> |
f9356baa | 38 | |
db965a28 | 39 | static EMACS_TIME TV1, TV2; |
f9356baa | 40 | static int watch_not_started = 1; /* flag */ |
d35af63c PE |
41 | static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "." |
42 | + LOG10_EMACS_TIME_RESOLUTION]; | |
f9356baa RS |
43 | |
44 | /* Reset the stopwatch to zero. */ | |
45 | ||
b23b5a5b | 46 | static void |
873fbd0b | 47 | reset_watch (void) |
f9356baa | 48 | { |
72ddb82c | 49 | EMACS_GET_TIME (TV1); |
f9356baa RS |
50 | watch_not_started = 0; |
51 | } | |
52 | ||
53 | /* This call returns the time since the last reset_watch call. The time | |
d35af63c | 54 | is returned as a string with the format <seconds>.<nanoseconds> |
1c1fce3f | 55 | If reset_watch was not called yet, exit. */ |
f9356baa | 56 | |
b23b5a5b | 57 | static char * |
873fbd0b | 58 | get_time (void) |
f9356baa | 59 | { |
d35af63c PE |
60 | uintmax_t s; |
61 | int ns; | |
f9356baa | 62 | if (watch_not_started) |
65396510 | 63 | exit (EXIT_FAILURE); /* call reset_watch first ! */ |
72ddb82c | 64 | EMACS_GET_TIME (TV2); |
db965a28 | 65 | EMACS_SUB_TIME (TV2, TV2, TV1); |
d35af63c PE |
66 | s = EMACS_SECS (TV2); |
67 | ns = EMACS_NSECS (TV2); | |
68 | sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_EMACS_TIME_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 */ |