sim/sim_time.cc

   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/sim_time.hh"
  35
  36 using namespace std;
  37
  38 namespace 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     void
  69     Start::reset()
  70     {
  71         ::gettimeofday(&start->tv, NULL);
  72     }
  73
  74     double
  75     Start::operator()() const
  76     {
  77         return convert(get());
  78     }
  79
  80     Now::Now()
  81         : now(0)
  82     {
  83     }
  84
  85     Now::~Now()
  86     {
  87         if (now)
  88             delete now;
  89     }
  90
  91     const timeval &
  92     Now::get() const
  93     {
  94         if (!now)
  95             now = new _timeval;
  96
  97         ::gettimeofday(&now->tv, NULL);
  98         return now->tv;
  99     }
 100
 101     double
 102     Now::operator()() const
 103     {
 104         return convert(get());
 105     }
 106
 107
 108     Elapsed::Elapsed()
 109         : elapsed(0)
 110     {}
 111
 112     Elapsed::~Elapsed()
 113     {
 114         if (elapsed)
 115             delete elapsed;
 116     }
 117
 118     const timeval &
 119     Elapsed::get() const
 120     {
 121         if (!elapsed)
 122             elapsed = new _timeval;
 123
 124         timersub(&_now.get(), &_start.get(), &elapsed->tv);
 125         return elapsed->tv;
 126     }
 127
 128     void
 129     Elapsed::reset()
 130     {
 131         _start.reset();
 132     }
 133
 134     double
 135     Elapsed::operator()() const
 136     {
 137         return convert(get());
 138     }
 139
 140     Start start;
 141     Now now;
 142     Elapsed elapsed;
 143
 144     ostream &
 145     operator<<(ostream &out, const Start &start)
 146     {
 147         out << ::ctime((const time_t *)&start.get().tv_sec);
 148         return out;
 149     }
 150
 151     ostream &
 152     operator<<(ostream &out, const Now &now)
 153     {
 154         out << ::ctime((const time_t *)&now.get().tv_sec);
 155         return out;
 156     }
 157
 158     ostream &
 159     operator<<(ostream &out, const Elapsed &elapsed)
 160     {
 161         out << ::ctime((const time_t *)&elapsed.get().tv_sec);
 162         return out;
 163     }
 164 }