time.cc revision 2 
1/*
2 * Copyright (c) 2003 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
29#include <sys/types.h>
30#include <sys/time.h>
31#include <time.h>
32#include <iostream>
33
34#include "sim_time.hh"
35
36using namespace std;
37
38namespace Time
39{
40    struct _timeval
41    {
42        timeval tv;
43    };
44
45    double
46    convert(const timeval &tv)
47    {
48        return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.0;
49    }
50
51    Start::Start()
52    {
53        start = new _timeval;
54        ::gettimeofday(&start->tv, NULL);
55    }
56
57    Start::~Start()
58    {
59        delete start;
60    }
61
62    const timeval &
63    Start::get() const
64    {
65        return start->tv;
66    }
67
68    double
69    Start::operator()() const
70    {
71        return convert(get());
72    }
73
74    Now::Now()
75        : now(0)
76    {
77    }
78
79    Now::~Now()
80    {
81        if (now)
82            delete now;
83    }
84
85    const timeval &
86    Now::get() const
87    {
88        if (!now)
89            now = new _timeval;
90
91        ::gettimeofday(&now->tv, NULL);
92        return now->tv;
93    }
94
95    double
96    Now::operator()() const
97    {
98        return convert(get());
99    }
100
101
102    Elapsed::Elapsed()
103        : elapsed(0)
104    {}
105
106    Elapsed::~Elapsed()
107    {
108        if (elapsed)
109            delete elapsed;
110    }
111
112    const timeval &
113    Elapsed::get() const
114    {
115        if (!elapsed)
116            elapsed = new _timeval;
117
118        timersub(&now.get(), &start.get(), &elapsed->tv);
119        return elapsed->tv;
120    }
121
122    double
123    Elapsed::operator()() const
124    {
125        return convert(get());
126    }
127
128    Start start;
129    Now now;
130    Elapsed elapsed;
131
132    ostream &
133    operator<<(ostream &out, const Start &start)
134    {
135        out << ::ctime(&start.get().tv_sec);
136        return out;
137    }
138
139    ostream &
140    operator<<(ostream &out, const Now &now)
141    {
142        out << ::ctime(&now.get().tv_sec);
143        return out;
144    }
145
146    ostream &
147    operator<<(ostream &out, const Elapsed &elapsed)
148    {
149        out << ::ctime(&elapsed.get().tv_sec);
150        return out;
151    }
152}
153