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     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((const time_t *)&start.get().tv_sec);
 136         return out;
 137     }
 138
 139     ostream &
 140     operator<<(ostream &out, const Now &now)
 141     {
 142         out << ::ctime((const time_t *)&now.get().tv_sec);
 143         return out;
 144     }
 145
 146     ostream &
 147     operator<<(ostream &out, const Elapsed &elapsed)
 148     {
 149         out << ::ctime((const time_t *)&elapsed.get().tv_sec);
 150         return out;
 151     }
 152 }