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428
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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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438
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35 #include <config.h>
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428
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36 #include <stdio.h>
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37 #include <stdlib.h>
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38 #include "../src/systime.h"
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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 #ifdef WINDOWSNT
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45 #include <sys/timeb.h>
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46 /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
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47 void
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48 gettimeofday (struct timeval *tv, struct timezone *tz)
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49 {
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50 struct _timeb tb;
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51 _ftime (&tb);
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52
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53 tv->tv_sec = tb.time;
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54 tv->tv_usec = tb.millitm * 1000L;
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55 if (tz)
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56 {
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57 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
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58 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
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59 }
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60 }
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61 #endif
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62
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63 /* Reset the stopwatch to zero. */
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64
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65 static void
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66 reset_watch (void)
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67 {
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68 EMACS_GET_TIME (TV1);
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69 watch_not_started = 0;
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70 }
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71
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72 /* This call returns the time since the last reset_watch call. The time
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73 is returned as a string with the format <seconds>.<micro-seconds>
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74 If reset_watch was not called yet, exit. */
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75
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76 static char *
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77 get_time (void)
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78 {
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79 if (watch_not_started)
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80 exit (1); /* call reset_watch first ! */
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81 EMACS_GET_TIME (TV2);
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82 if (TV1.tv_usec > TV2.tv_usec)
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83 {
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84 TV2.tv_usec += 1000000;
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85 TV2.tv_sec--;
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86 }
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87 sprintf (time_string, "%lu.%06lu",
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88 (unsigned long) TV2.tv_sec - TV1.tv_sec,
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89 (unsigned long) TV2.tv_usec - TV1.tv_usec);
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90 return time_string;
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91 }
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92
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93 int
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94 main (int argc, char *argv[])
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95 {
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96 int c;
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97 while ((c = getchar ()) != EOF)
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98 {
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99 switch (c)
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100 {
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101 case 'z':
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102 reset_watch ();
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103 break;
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104 case 'p':
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105 puts (get_time ());
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106 break;
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107 case 'q':
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108 exit (0);
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109 }
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110 /* Anything remaining on the line is ignored. */
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111 while (c != '\n' && c != EOF)
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112 c = getchar ();
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113 }
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114 return 1;
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115 }
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