| | 1 | /* profile.c --- generate periodic events for profiling of Emacs Lisp code. |
| | 2 | Copyright (C) 1992, 1994, 1999, 2001-2013 Free Software Foundation, |
| | 3 | Inc. |
| | 4 | |
| | 5 | Author: Boaz Ben-Zvi <boaz@lcs.mit.edu> |
| | 6 | |
| | 7 | This file is part of GNU Emacs. |
| | 8 | |
| | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
| | 10 | it under the terms of the GNU General Public License as published by |
| | 11 | the Free Software Foundation, either version 3 of the License, or |
| | 12 | (at your option) any later version. |
| | 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 |
| | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| | 21 | |
| | 22 | |
| | 23 | /** |
| | 24 | ** To be run as an emacs subprocess. 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 <config.h> |
| | 33 | |
| | 34 | #define SYSTIME_INLINE EXTERN_INLINE |
| | 35 | |
| | 36 | #include <inttypes.h> |
| | 37 | #include <stdio.h> |
| | 38 | |
| | 39 | #include <intprops.h> |
| | 40 | #include <systime.h> |
| | 41 | |
| | 42 | static struct timespec TV1; |
| | 43 | static int watch_not_started = 1; /* flag */ |
| | 44 | static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "." |
| | 45 | + LOG10_TIMESPEC_RESOLUTION]; |
| | 46 | |
| | 47 | /* Reset the stopwatch to zero. */ |
| | 48 | |
| | 49 | static void |
| | 50 | reset_watch (void) |
| | 51 | { |
| | 52 | TV1 = current_timespec (); |
| | 53 | watch_not_started = 0; |
| | 54 | } |
| | 55 | |
| | 56 | /* This call returns the time since the last reset_watch call. The time |
| | 57 | is returned as a string with the format <seconds>.<nanoseconds> |
| | 58 | If reset_watch was not called yet, exit. */ |
| | 59 | |
| | 60 | static char * |
| | 61 | get_time (void) |
| | 62 | { |
| | 63 | struct timespec TV2 = timespec_sub (current_timespec (), TV1); |
| | 64 | uintmax_t s = TV2.tv_sec; |
| | 65 | int ns = TV2.tv_nsec; |
| | 66 | if (watch_not_started) |
| | 67 | exit (EXIT_FAILURE); /* call reset_watch first ! */ |
| | 68 | sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_TIMESPEC_RESOLUTION, ns); |
| | 69 | return time_string; |
| | 70 | } |
| | 71 | \f |
| | 72 | int |
| | 73 | main (void) |
| | 74 | { |
| | 75 | int c; |
| | 76 | while ((c = getchar ()) != EOF) |
| | 77 | { |
| | 78 | switch (c) |
| | 79 | { |
| | 80 | case 'z': |
| | 81 | reset_watch (); |
| | 82 | break; |
| | 83 | case 'p': |
| | 84 | puts (get_time ()); |
| | 85 | break; |
| | 86 | case 'q': |
| | 87 | exit (EXIT_SUCCESS); |
| | 88 | } |
| | 89 | /* Anything remaining on the line is ignored. */ |
| | 90 | while (c != '\n' && c != EOF) |
| | 91 | c = getchar (); |
| | 92 | } |
| | 93 | exit (EXIT_FAILURE); |
| | 94 | } |
| | 95 | |
| | 96 | |
| | 97 | /* profile.c ends here */ |
HCoop / bpt / emacs.git / blame_incremental