bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/* profile.c --- generate periodic events for profiling of Emacs Lisp code.
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Copyright (C) 1992, 1994, 1999, 2001-2017 Free Software Foundation,
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Inc.
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Author: Boaz Ben-Zvi <boaz@lcs.mit.edu>
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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/**
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** To be run as an emacs subprocess. Input string that starts with:
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** 'z' -- resets the watch (to zero).
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** 'p' -- return time (on stdout) as string with format <sec>.<micro-sec>
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** 'q' -- exit.
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**
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** abstraction : a stopwatch
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** operations: reset_watch, get_time
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*/
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#define INLINE EXTERN_INLINE
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#include <config.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <intprops.h>
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#include <systime.h>
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#include <unlocked-io.h>
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static struct timespec TV1;
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static int watch_not_started = 1; /* flag */
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static char time_string[INT_STRLEN_BOUND (uintmax_t) + sizeof "."
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+ LOG10_TIMESPEC_RESOLUTION];
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/* Reset the stopwatch to zero. */
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static void
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reset_watch (void)
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{
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TV1 = current_timespec ();
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watch_not_started = 0;
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}
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/* This call returns the time since the last reset_watch call. The time
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is returned as a string with the format <seconds>.<nanoseconds>
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If reset_watch was not called yet, exit. */
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static char *
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get_time (void)
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{
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struct timespec TV2 = timespec_sub (current_timespec (), TV1);
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uintmax_t s = TV2.tv_sec;
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int ns = TV2.tv_nsec;
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if (watch_not_started)
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exit (EXIT_FAILURE); /* call reset_watch first ! */
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sprintf (time_string, "%"PRIuMAX".%0*d", s, LOG10_TIMESPEC_RESOLUTION, ns);
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return time_string;
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}
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int
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main (void)
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{
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int c;
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while ((c = getchar ()) != EOF)
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{
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switch (c)
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{
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case 'z':
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reset_watch ();
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break;
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case 'p':
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puts (get_time ());
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break;
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case 'q':
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return EXIT_SUCCESS;
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}
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/* Anything remaining on the line is ignored. */
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while (c != '\n' && c != EOF)
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c = getchar ();
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}
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return EXIT_FAILURE;
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}
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/* profile.c ends here */
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