time.cc revision 7870 
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 <iostream>
32#include <sstream>
33
34#include "base/time.hh"
35#include "config/use_posix_clock.hh"
36#include "sim/core.hh"
37#include "sim/serialize.hh"
38
39using namespace std;
40
41void
42Time::_set(bool monotonic)
43{
44#if USE_POSIX_CLOCK
45    ::clock_gettime(monotonic ? CLOCK_MONOTONIC : CLOCK_REALTIME, &_time);
46#else
47    timeval tv;
48    ::gettimeofday(&tv, NULL);
49    operator=(tv);
50#endif
51}
52
53void
54Time::setTick(Tick ticks)
55{
56    uint64_t nsecs = ticks / SimClock::Int::ns;
57    set(nsecs / NSEC_PER_SEC, nsecs % NSEC_PER_SEC);
58}
59
60Tick
61Time::getTick() const
62{
63    return (nsec() + sec() * NSEC_PER_SEC) * SimClock::Int::ns;
64}
65
66string
67Time::date(const string &format) const
68{
69    time_t sec = this->sec();
70    char buf[256];
71
72    if (format.empty()) {
73#ifdef __SUNPRO_CC
74        ctime_r(&sec, buf, sizeof(buf));
75#else
76        ctime_r(&sec, buf);
77#endif
78        buf[24] = '\0';
79        return buf;
80    }
81
82    struct tm *tm = localtime(&sec);
83    strftime(buf, sizeof(buf), format.c_str(), tm);
84    return buf;
85}
86
87string
88Time::time() const
89{
90    double time = double(*this);
91    double secs = fmod(time, 60.0);
92    double all_mins = floor(time / 60.0);
93    double mins = fmod(all_mins, 60.0);
94    double hours = floor(all_mins / 60.0);
95
96    stringstream str;
97
98    if (hours > 0.0) {
99        if (hours < 10.0)
100            str << '0';
101        str << hours << ':';
102    }
103
104    if (mins > 0.0) {
105        if (mins < 10.0)
106            str << '0';
107        str << mins << ':';
108    }
109
110    if (secs < 10.0 && !str.str().empty())
111        str << '0';
112    str << secs;
113
114    return str.str();
115}
116
117void
118Time::serialize(const std::string &base, ostream &os)
119{
120    paramOut(os, base + ".sec", sec());
121    paramOut(os, base + ".nsec", nsec());
122}
123
124void
125Time::unserialize(const std::string &base, Checkpoint *cp,
126                  const string &section)
127{
128    time_t secs;
129    time_t nsecs;
130    paramIn(cp, section, base + ".sec", secs);
131    paramIn(cp, section, base + ".nsec", nsecs);
132    sec(secs);
133    nsec(nsecs);
134}
135
136void
137sleep(const Time &time)
138{
139    timespec ts = time;
140
141#if USE_POSIX_CLOCK
142    clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
143#else
144    nanosleep(&ts, NULL);
145#endif
146}
147