edb8595f74291c92806766b8e994ae0098f64467
[claws.git] / src / common / timing.h
1 /*
2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3  * Copyright (C) 2005-2007 Colin Leroy <colin@colino.net> & the Claws Mail 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