1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
Copyright (C) 1990, 1992, 1995 Free Software Foundation
written by Doug Lea (dl@rocky.oswego.edu)
This file is part of the GNU C++ Library. This library is free
software; you can redistribute it and/or modify it under the terms of
the GNU Library General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version. This library is distributed in the hope
that it will be useful, but WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the GNU Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef __GNUG__
#pragma implementation
#endif
/* Timing functions from Doug Schmidt... */
/* no such thing as "negative time"! */
#define TIMER_ERROR_VALUE -1.0
/* If this does not work on your system, change this to #if 0, and
report the problem. */
#if 1
#include <_G_config.h>
#include <sys/types.h>
#if _G_HAVE_SYS_RESOURCE
#include <sys/time.h>
#include <sys/resource.h>
#endif
#if !_G_HAVE_SYS_RESOURCE || !defined(RUSAGE_SELF)
#if _G_HAVE_SYS_TIMES
#define USE_TIMES
#include <sys/param.h>
#include <sys/times.h>
#if !defined (HZ) && defined(CLK_TCK)
#define HZ CLK_TCK
#endif
static struct tms Old_Time;
static struct tms New_Time;
#else /* ! _G_HAVE_SYS_TIMES */
#define USE_CLOCK
#include <time.h>
#ifndef CLOCKS_PER_SEC
#define CLOCKS_PER_SEC 1
#endif
clock_t Old_Time;
clock_t New_Time;
#endif /* ! _G_HAVE_SYS_TIMES */
#else /* _G_HAVE_SYS_RESOURCE && defined(RUSAGE_SELF) */
static struct rusage Old_Time;
static struct rusage New_Time;
#endif
static int Timer_Set = 0;
double
start_timer()
{
Timer_Set = 1;
#ifdef USE_CLOCK
Old_Time = clock() / CLOCKS_PER_SEC;
return((double) Old_Time);
#else
#ifdef USE_TIMES
times(&Old_Time);
return((double) Old_Time.tms_utime / HZ);
#else
getrusage(RUSAGE_SELF,&Old_Time); /* set starting process time */
return(Old_Time.ru_utime.tv_sec + (Old_Time.ru_utime.tv_usec / 1000000.0));
#endif
#endif
}
/* Returns process time since Last_Time.
If parameter is 0.0, returns time since the Old_Time was set.
Returns TIMER_ERROR_VALUE if `start_timer' is not called first. */
double
return_elapsed_time(Last_Time)
double Last_Time;
{
if (!Timer_Set) {
return(TIMER_ERROR_VALUE);
}
else {
/* get process time */
#ifdef USE_CLOCK
New_Time = clock();
#else
#ifdef USE_TIMES
times(&New_Time);
#else
getrusage(RUSAGE_SELF,&New_Time);
#endif
#endif
if (Last_Time == 0.0) {
#ifdef USE_CLOCK
return((double) (New_Time - Old_Time) / CLOCKS_PER_SEC);
#else
#ifdef USE_TIMES
return((double) (New_Time.tms_utime - Old_Time.tms_utime) / HZ);
#else
return((New_Time.ru_utime.tv_sec - Old_Time.ru_utime.tv_sec) +
((New_Time.ru_utime.tv_usec - Old_Time.ru_utime.tv_usec)
/ 1000000.0));
#endif
#endif
}
else {
#ifdef USE_CLOCK
return((double) New_Time / CLOCKS_PER_SEC - Last_Time);
#else
#ifdef USE_TIMES
return((double) New_Time.tms_utime / HZ - Last_Time);
#else
return((New_Time.ru_utime.tv_sec +
(New_Time.ru_utime.tv_usec / 1000000.0)) - Last_Time);
#endif
#endif
}
}
}
#ifdef VMS
void sys$gettim(unsigned int*) asm("sys$gettim");
getrusage(int dummy,struct rusage* time){
double rtime;
unsigned int systime[2];
int i;
sys$gettim(&systime[0]);
rtime=systime[1];
for(i=0;i<4;i++) rtime *= 256;
rtime+= systime[0];
/* we subtract an offset to make sure that the number fits in a long int*/
rtime=rtime/1.0e+7-4.144e+9;
time->ru_utime.tv_sec= rtime;
rtime=(rtime-time->ru_utime.tv_sec)*1.0e6;
time->ru_utime.tv_usec= rtime;
}
#endif
#else /* dummy them out */
double start_timer()
{
return TIMER_ERROR_VALUE;
}
double
return_elapsed_time(Last_Time)
double Last_Time;
{
return TIMER_ERROR_VALUE;
}
#endif /* timing stuff */
|
