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- /* profile.c --- generate periodic events for profiling of Emacs Lisp code.
- Copyright (C) 1992, 1994 Free Software Foundation, Inc.
-
- Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /**
- ** To be run as an emacs process. Input string that starts with:
- ** 'z' -- resets the watch (to zero).
- ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
- ** 'q' -- exit.
- **
- ** abstraction : a stopwatch
- ** operations: reset_watch, get_time
- */
- #include <stdio.h>
- #include <../src/config.h>
- #include <../src/systime.h>
-
- static struct timeval TV1, TV2;
- static int watch_not_started = 1; /* flag */
- static char time_string[30];
-
- /* Reset the stopwatch to zero. */
-
- int
- reset_watch ()
- {
- EMACS_GET_TIME (TV1);
- watch_not_started = 0;
- }
-
- /* This call returns the time since the last reset_watch call. The time
- is returned as a string with the format <seconds>.<micro-seconds>
- If reset_watch was not called yet, exit. */
-
- char *
- get_time ()
- {
- if (watch_not_started)
- exit (1); /* call reset_watch first ! */
- EMACS_GET_TIME (TV2);
- if (TV1.tv_usec > TV2.tv_usec)
- {
- TV2.tv_usec += 1000000;
- TV2.tv_sec--;
- }
- sprintf (time_string, "%lu.%06lu",
- TV2.tv_sec - TV1.tv_sec, TV2.tv_usec - TV1.tv_usec);
- return time_string;
- }
-
- void
- main ()
- {
- int c;
- while ((c = getchar ()) != EOF)
- {
- switch (c)
- {
- case 'z':
- reset_watch ();
- break;
- case 'p':
- puts (get_time ());
- break;
- case 'q':
- exit (0);
- }
- /* Anything remaining on the line is ignored. */
- while (c != '\n' && c != EOF)
- c = getchar ();
- }
- exit (1);
- }
-