e97993be6a298d6db98b5f6c8634c3d1cb643c01
[openocd.git] / src / helper / time_support.c
1 /***************************************************************************
2 * Copyright (C) 2006 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
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 *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include "replacements.h"
25 #include "time_support.h"
26 #include "log.h"
27
28 #include <stdlib.h>
29
30 int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y);
31 int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y);
32 int timeval_add_time(struct timeval *result, int sec, int usec);
33
34 /* calculate difference between two struct timeval values */
35 int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
36 {
37 if (x->tv_usec < y->tv_usec)
38 {
39 int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
40 y->tv_usec -= 1000000 * nsec;
41 y->tv_sec += nsec;
42 }
43 if (x->tv_usec - y->tv_usec > 1000000) {
44 int nsec = (x->tv_usec - y->tv_usec) / 1000000;
45 y->tv_usec += 1000000 * nsec;
46 y->tv_sec -= nsec;
47 }
48
49 result->tv_sec = x->tv_sec - y->tv_sec;
50 result->tv_usec = x->tv_usec - y->tv_usec;
51
52 /* Return 1 if result is negative. */
53 return x->tv_sec < y->tv_sec;
54 }
55
56 /* add two struct timeval values */
57 int timeval_add(struct timeval *result, struct timeval *x, struct timeval *y)
58 {
59 result->tv_sec = x->tv_sec + y->tv_sec;
60
61 result->tv_usec = x->tv_usec + y->tv_usec;
62
63 while (result->tv_usec > 1000000)
64 {
65 result->tv_usec -= 1000000;
66 result->tv_sec++;
67 }
68
69 return 0;
70 }
71
72 int timeval_add_time(struct timeval *result, int sec, int usec)
73 {
74 result->tv_sec += sec;
75 result->tv_usec += usec;
76
77 while (result->tv_usec > 1000000)
78 {
79 result->tv_usec -= 1000000;
80 result->tv_sec++;
81 }
82
83 return 0;
84 }
85
86 int duration_start_measure(duration_t *duration)
87 {
88 gettimeofday(&duration->start, NULL);
89
90 return ERROR_OK;
91 }
92
93 int duration_stop_measure(duration_t *duration, char **text)
94 {
95 struct timeval end;
96
97 gettimeofday(&end, NULL);
98
99 timeval_subtract(&duration->duration, &end, &duration->start);
100
101 if (text)
102 {
103 float t;
104 t=duration->duration.tv_sec;
105 t+=(float)duration->duration.tv_usec/1000000.0;
106 *text = malloc(100);
107 snprintf(*text, 100, "%fs", t);
108 }
109
110 return ERROR_OK;
111 }
112
113
114
115
116 long long timeval_ms()
117 {
118 struct timeval now;
119 long long t=0;
120 gettimeofday(&now, NULL);
121
122 t+=now.tv_usec/1000;
123 t+=now.tv_sec*1000;
124
125 return t;
126 }