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1 /* profile.c --- generate periodic events for profiling of Emacs Lisp code.
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2 Copyright (C) 1992, 1994 Free Software Foundation, Inc.
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3
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4 Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
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5
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6 This file is part of GNU Emacs.
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7
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8 GNU Emacs is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 2, or (at your option)
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11 any later version.
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12
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13 GNU Emacs is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GNU Emacs; see the file COPYING. If not, write to
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20 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA. */
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22
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23 /* Synched up with: FSF 19.28. */
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24 /* #### Not sure if this is needed for XEmacs. */
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25
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26 /**
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27 ** To be run as an emacs process. Input string that starts with:
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28 ** 'z' -- resets the watch (to zero).
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29 ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
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30 ** 'q' -- exit.
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31 **
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32 ** abstraction : a stopwatch
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33 ** operations: reset_watch, get_time
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34 */
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175
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35 #include <../src/config.h>
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0
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36 #include <stdio.h>
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37 #include <stdlib.h>
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157
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38 #include "../src/systime.h"
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0
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39
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40 static struct timeval TV1, TV2;
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41 static int watch_not_started = 1; /* flag */
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42 static char time_string[30];
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43
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44 /* Reset the stopwatch to zero. */
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45
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46 static void
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47 reset_watch (void)
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48 {
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49 EMACS_GET_TIME (TV1);
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50 watch_not_started = 0;
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51 }
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52
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53 /* This call returns the time since the last reset_watch call. The time
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54 is returned as a string with the format <seconds>.<micro-seconds>
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55 If reset_watch was not called yet, exit. */
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56
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57 static char *
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58 get_time (void)
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59 {
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60 if (watch_not_started)
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61 exit (1); /* call reset_watch first ! */
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62 EMACS_GET_TIME (TV2);
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63 if (TV1.tv_usec > TV2.tv_usec)
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64 {
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65 TV2.tv_usec += 1000000;
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66 TV2.tv_sec--;
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67 }
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68 sprintf (time_string, "%lu.%06lu",
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69 (unsigned long) TV2.tv_sec - TV1.tv_sec,
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70 (unsigned long) TV2.tv_usec - TV1.tv_usec);
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71 return time_string;
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72 }
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73
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149
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74 int
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75 main (int argc, char *argv[])
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0
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76 {
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77 int c;
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78 while ((c = getchar ()) != EOF)
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79 {
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80 switch (c)
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81 {
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82 case 'z':
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83 reset_watch ();
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84 break;
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85 case 'p':
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86 puts (get_time ());
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87 break;
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88 case 'q':
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89 exit (0);
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90 }
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91 /* Anything remaining on the line is ignored. */
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92 while (c != '\n' && c != EOF)
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93 c = getchar ();
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94 }
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149
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95 return 1;
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0
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96 }
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