time.cc revision 2665 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 */
30
31#include <sys/types.h>
32#include <sys/time.h>
33#include <time.h>
34#include <iostream>
35#include <string>
36
37#include "base/time.hh"
38
39using namespace std;
40
41struct _timeval
42{
43    timeval tv;
44};
45
46double
47convert(const timeval &tv)
48{
49    return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
50}
51
52Time::Time(bool set_now)
53{
54    time = new _timeval;
55    if (set_now)
56        set();
57}
58
59Time::Time(const timeval &val)
60{
61    time = new _timeval;
62    set(val);
63}
64
65Time::Time(const Time &val)
66{
67    time = new _timeval;
68    set(val.get());
69}
70
71Time::~Time()
72{
73    delete time;
74}
75
76const timeval &
77Time::get() const
78{
79    return time->tv;
80}
81
82void
83Time::set()
84{
85    ::gettimeofday(&time->tv, NULL);
86}
87
88void
89Time::set(const timeval &tv)
90{
91    memcpy(&time->tv, &tv, sizeof(timeval));
92}
93
94double
95Time::operator()() const
96{
97    return convert(get());
98}
99
100string
101Time::date(string format) const
102{
103    const timeval &tv = get();
104    time_t sec = tv.tv_sec;
105    char buf[256];
106
107    if (format.empty()) {
108        ctime_r(&sec, buf);
109        buf[24] = '\0';
110        return buf;
111    }
112
113    struct tm *tm = localtime(&sec);
114    strftime(buf, sizeof(buf), format.c_str(), tm);
115    return buf;
116}
117
118ostream &
119operator<<(ostream &out, const Time &start)
120{
121    out << start.date();
122    return out;
123}
124
125Time
126operator-(const Time &l, const Time &r)
127{
128    timeval tv;
129    timersub(&l.get(), &r.get(), &tv);
130    return tv;
131}
132
133const Time Time::start(true);
134