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comparison lib-src/profile.c @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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children 84b14dcb0985
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427:0a0253eac470 428:3ecd8885ac67
1 /* profile.c --- generate periodic events for profiling of Emacs Lisp code.
2 Copyright (C) 1992, 1994 Free Software Foundation, Inc.
3
4 Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
5
6 This file is part of GNU Emacs.
7
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
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
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
22
23 /* Synched up with: FSF 19.28. */
24 /* #### Not sure if this is needed for XEmacs. */
25
26 /**
27 ** To be run as an emacs process. Input string that starts with:
28 ** 'z' -- resets the watch (to zero).
29 ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
30 ** 'q' -- exit.
31 **
32 ** abstraction : a stopwatch
33 ** operations: reset_watch, get_time
34 */
35 #include <../src/config.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include "../src/systime.h"
39
40 static struct timeval TV1, TV2;
41 static int watch_not_started = 1; /* flag */
42 static char time_string[30];
43
44 #ifdef WINDOWSNT
45 #include <sys/timeb.h>
46 /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
47 void
48 gettimeofday (struct timeval *tv, struct timezone *tz)
49 {
50 struct _timeb tb;
51 _ftime (&tb);
52
53 tv->tv_sec = tb.time;
54 tv->tv_usec = tb.millitm * 1000L;
55 if (tz)
56 {
57 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
58 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
59 }
60 }
61 #endif
62
63 /* Reset the stopwatch to zero. */
64
65 static void
66 reset_watch (void)
67 {
68 EMACS_GET_TIME (TV1);
69 watch_not_started = 0;
70 }
71
72 /* This call returns the time since the last reset_watch call. The time
73 is returned as a string with the format <seconds>.<micro-seconds>
74 If reset_watch was not called yet, exit. */
75
76 static char *
77 get_time (void)
78 {
79 if (watch_not_started)
80 exit (1); /* call reset_watch first ! */
81 EMACS_GET_TIME (TV2);
82 if (TV1.tv_usec > TV2.tv_usec)
83 {
84 TV2.tv_usec += 1000000;
85 TV2.tv_sec--;
86 }
87 sprintf (time_string, "%lu.%06lu",
88 (unsigned long) TV2.tv_sec - TV1.tv_sec,
89 (unsigned long) TV2.tv_usec - TV1.tv_usec);
90 return time_string;
91 }
92
93 int
94 main (int argc, char *argv[])
95 {
96 int c;
97 while ((c = getchar ()) != EOF)
98 {
99 switch (c)
100 {
101 case 'z':
102 reset_watch ();
103 break;
104 case 'p':
105 puts (get_time ());
106 break;
107 case 'q':
108 exit (0);
109 }
110 /* Anything remaining on the line is ignored. */
111 while (c != '\n' && c != EOF)
112 c = getchar ();
113 }
114 return 1;
115 }