*** empty log message ***
[emacs.git] / lib-src / profile.c
blob9c43c16e776e753fdf4b631de84c9a6288654e44
1 /* profile.c --- generate periodic events for profiling of Emacs Lisp code.
2 Copyright (C) 1992, 1994, 1999 Free Software Foundation, Inc.
4 Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
6 This file is part of GNU Emacs.
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.
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.
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 Software Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /**
25 ** To be run as an emacs process. Input string that starts with:
26 ** 'z' -- resets the watch (to zero).
27 ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
28 ** 'q' -- exit.
30 ** abstraction : a stopwatch
31 ** operations: reset_watch, get_time
33 #include <config.h>
34 #include <stdio.h>
35 #include <systime.h>
37 static EMACS_TIME TV1, TV2;
38 static int watch_not_started = 1; /* flag */
39 static char time_string[30];
41 /* Reset the stopwatch to zero. */
43 void
44 reset_watch ()
46 EMACS_GET_TIME (TV1);
47 watch_not_started = 0;
50 /* This call returns the time since the last reset_watch call. The time
51 is returned as a string with the format <seconds>.<micro-seconds>
52 If reset_watch was not called yet, exit. */
54 char *
55 get_time ()
57 if (watch_not_started)
58 exit (1); /* call reset_watch first ! */
59 EMACS_GET_TIME (TV2);
60 EMACS_SUB_TIME (TV2, TV2, TV1);
61 sprintf (time_string, "%lu.%06lu", (unsigned long)EMACS_SECS (TV2), (unsigned long)EMACS_USECS (TV2));
62 return time_string;
65 #if ! defined (HAVE_GETTIMEOFDAY) && defined (HAVE_TIMEVAL)
67 /* ARGSUSED */
68 gettimeofday (tp, tzp)
69 struct timeval *tp;
70 struct timezone *tzp;
72 extern long time ();
74 tp->tv_sec = time ((long *)0);
75 tp->tv_usec = 0;
76 if (tzp != 0)
77 tzp->tz_minuteswest = -1;
80 #endif
82 int
83 main ()
85 int c;
86 while ((c = getchar ()) != EOF)
88 switch (c)
90 case 'z':
91 reset_watch ();
92 break;
93 case 'p':
94 puts (get_time ());
95 break;
96 case 'q':
97 exit (0);
99 /* Anything remaining on the line is ignored. */
100 while (c != '\n' && c != EOF)
101 c = getchar ();
103 exit (1);