src/common/timing.h

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 2005-2006 Colin Leroy <colin@colino.net> & the Sylpheed-Claws team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 /*
  21  * This is a (quite naive) timer, to help determine the speed of various
  22  * functions of Claws. By default START_TIMING() and END_TIMING() are NOPS,
  23  * so that nothing gets printed out. If you change the #if, however, you'll
  24  * be able to get functions timing information. As the implementation is
  25  * naive, START_TIMING("message"); must be present just at the end of a
  26  * declaration block (or compilation would fail with gcc 2.x), and the
  27  * END_TIMING() call must be in the same scope.
  28  */
  29 #ifndef __TIMING_H__
  30 #define __TIMING_H__
  31
  32 #include <sys/time.h>
  33 #ifdef HAVE_CONFIG_H
  34 #  include "config.h"
  35 #endif
  36
  37 #include "utils.h"
  38 # define mytimersub(a, b, result)                                             \
  39   do {                                                                        \
  40     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
  41     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
  42     if ((result)->tv_usec < 0) {                                              \
  43       --(result)->tv_sec;                                                     \
  44       (result)->tv_usec += 1000000;                                           \
  45     }                                                                         \
  46   } while (0)
  47
  48 #if 0 /* set to 0 to measure times at various places */
  49 #define START_TIMING(str) do {} while(0);
  50 #define END_TIMING() do {} while(0);
  51 #else
  52 /* no {} by purpose */
  53 #define START_TIMING(str)                                               \
  54         struct timeval start;                                           \
  55         struct timeval end;                                             \
  56         struct timeval diff;                                            \
  57         const char *timing_name=str;                                    \
  58         gettimeofday(&start, NULL);                                     \
  59
  60 #ifdef __GLIBC__
  61 #define END_TIMING()                                                    \
  62         gettimeofday(&end, NULL);                                       \
  63         mytimersub(&end, &start, &diff);                                \
  64         debug_print("TIMING %s %s: %ds%03dms\n",                        \
  65                 __FUNCTION__,                                           \
  66                 timing_name, (unsigned int)diff.tv_sec,                 \
  67                 (unsigned int)diff.tv_usec/1000);
  68 #else
  69 #define END_TIMING()                                                    \
  70         gettimeofday(&end, NULL);                                       \
  71         mytimersub(&end, &start, &diff);                                \
  72         debug_print("TIMING %s: %ds%03dms\n",                           \
  73                 timing_name, (unsigned int)diff.tv_sec,                 \
  74                 (unsigned int)diff.tv_usec/1000);
  75 #endif
  76
  77 #endif
  78 #endif