mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-29 07:58:28 +00:00
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/* 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. */
|
|
|
|
void
|
|
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);
|
|
}
|