src/base/time.cc

   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
  39 using namespace std;
  40
  41 void
  42 Time::_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
  53 void
  54 Time::setTick(Tick ticks)
  55 {
  56     uint64_t nsecs = ticks / SimClock::Int::ns;
  57     set(nsecs / NSEC_PER_SEC, nsecs % NSEC_PER_SEC);
  58 }
  59
  60 Tick
  61 Time::getTick() const
  62 {
  63     return (nsec() + sec() * NSEC_PER_SEC) * SimClock::Int::ns;
  64 }
  65
  66 string
  67 Time::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
  87 string
  88 Time::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
 117 void
 118 Time::serialize(const std::string &base, ostream &os)
 119 {
 120     paramOut(os, base + ".sec", sec());
 121     paramOut(os, base + ".nsec", nsec());
 122 }
 123
 124 void
 125 Time::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
 136 void
 137 sleep(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 }