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comparison lib-src/profile.c @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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children 538048ae2ab8
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-1:000000000000 0:376386a54a3c
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 <stdio.h>
36 #if __STDC__ || defined(STDC_HEADERS)
37 #include <stdlib.h>
38 #endif
39 #include <config.h>
40 #include <../src/systime.h>
41
42 static struct timeval TV1, TV2;
43 static int watch_not_started = 1; /* flag */
44 static char time_string[30];
45
46 /* Reset the stopwatch to zero. */
47
48 static void
49 reset_watch (void)
50 {
51 EMACS_GET_TIME (TV1);
52 watch_not_started = 0;
53 }
54
55 /* This call returns the time since the last reset_watch call. The time
56 is returned as a string with the format <seconds>.<micro-seconds>
57 If reset_watch was not called yet, exit. */
58
59 static char *
60 get_time (void)
61 {
62 if (watch_not_started)
63 exit (1); /* call reset_watch first ! */
64 EMACS_GET_TIME (TV2);
65 if (TV1.tv_usec > TV2.tv_usec)
66 {
67 TV2.tv_usec += 1000000;
68 TV2.tv_sec--;
69 }
70 sprintf (time_string, "%lu.%06lu",
71 (unsigned long) TV2.tv_sec - TV1.tv_sec,
72 (unsigned long) TV2.tv_usec - TV1.tv_usec);
73 return time_string;
74 }
75
76 void
77 main (void)
78 {
79 int c;
80 while ((c = getchar ()) != EOF)
81 {
82 switch (c)
83 {
84 case 'z':
85 reset_watch ();
86 break;
87 case 'p':
88 puts (get_time ());
89 break;
90 case 'q':
91 exit (0);
92 }
93 /* Anything remaining on the line is ignored. */
94 while (c != '\n' && c != EOF)
95 c = getchar ();
96 }
97 exit (1);
98 }