1/* profile.c --- generate periodic events for profiling of Emacs Lisp code. 2 Copyright (C) 1992, 1994, 1999, 2001, 2002, 2003, 2004, 3 2005, 2006, 2007 Free Software Foundation, Inc. 4 5 Author: Boaz Ben-Zvi <boaz@lcs.mit.edu> 6 7This file is part of GNU Emacs. 8 9GNU Emacs is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2, or (at your option) 12any later version. 13 14GNU Emacs is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with GNU Emacs; see the file COPYING. If not, write to 21the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 22Boston, MA 02110-1301, USA. */ 23 24 25/** 26 ** To be run as an emacs process. Input string that starts with: 27 ** 'z' -- resets the watch (to zero). 28 ** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec> 29 ** 'q' -- exit. 30 ** 31 ** abstraction : a stopwatch 32 ** operations: reset_watch, get_time 33 */ 34#include <config.h> 35#include <stdio.h> 36#include <systime.h> 37 38static EMACS_TIME TV1, TV2; 39static int watch_not_started = 1; /* flag */ 40static char time_string[30]; 41 42/* Reset the stopwatch to zero. */ 43 44void 45reset_watch () 46{ 47 EMACS_GET_TIME (TV1); 48 watch_not_started = 0; 49} 50 51/* This call returns the time since the last reset_watch call. The time 52 is returned as a string with the format <seconds>.<micro-seconds> 53 If reset_watch was not called yet, exit. */ 54 55char * 56get_time () 57{ 58 if (watch_not_started) 59 exit (EXIT_FAILURE); /* call reset_watch first ! */ 60 EMACS_GET_TIME (TV2); 61 EMACS_SUB_TIME (TV2, TV2, TV1); 62 sprintf (time_string, "%lu.%06lu", (unsigned long)EMACS_SECS (TV2), (unsigned long)EMACS_USECS (TV2)); 63 return time_string; 64} 65 66#if ! defined (HAVE_GETTIMEOFDAY) && defined (HAVE_TIMEVAL) 67 68/* ARGSUSED */ 69gettimeofday (tp, tzp) 70 struct timeval *tp; 71 struct timezone *tzp; 72{ 73 extern long time (); 74 75 tp->tv_sec = time ((long *)0); 76 tp->tv_usec = 0; 77 if (tzp != 0) 78 tzp->tz_minuteswest = -1; 79} 80 81#endif 82 83int 84main () 85{ 86 int c; 87 while ((c = getchar ()) != EOF) 88 { 89 switch (c) 90 { 91 case 'z': 92 reset_watch (); 93 break; 94 case 'p': 95 puts (get_time ()); 96 break; 97 case 'q': 98 exit (EXIT_SUCCESS); 99 } 100 /* Anything remaining on the line is ignored. */ 101 while (c != '\n' && c != EOF) 102 c = getchar (); 103 } 104 exit (EXIT_FAILURE); 105} 106 107/* arch-tag: 8db68f7e-2322-4944-a315-dba349bdbf39 108 (do not change this comment) */ 109 110/* profile.c ends here */ 111