git.m6w6.name Git - awesomized/libmemcached/blob - libtest/timer.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Data Differential YATL (i.e. libtest)  library
   4  *
   5  *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions are
   9  *  met:
  10  *
  11  *      * Redistributions of source code must retain the above copyright
  12  *  notice, this list of conditions and the following disclaimer.
  13  *
  14  *      * Redistributions in binary form must reproduce the above
  15  *  copyright notice, this list of conditions and the following disclaimer
  16  *  in the documentation and/or other materials provided with the
  17  *  distribution.
  18  *
  19  *      * The names of its contributors may not be used to endorse or
  20  *  promote products derived from this software without specific prior
  21  *  written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  29  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  30  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  33  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  */
  36
  37 #include "libtest/yatlcon.h"
  38
  39 #include <libtest/timer.hpp>
  40
  41 #include <ctime>
  42 #include <iomanip>
  43
  44 #ifdef __MACH__
  45 # include <mach/clock.h>
  46 # include <mach/mach.h>
  47 #else
  48 # include <sys/time.h>
  49 #endif
  50
  51 namespace libtest {
  52
  53 Timer::Timer()
  54 {
  55   _begin.tv_sec= 0;
  56   _begin.tv_nsec= 0;
  57   _end.tv_sec= 0;
  58   _end.tv_nsec= 0;
  59 }
  60
  61 void Timer::reset()
  62 {
  63   _end.tv_sec= 0;
  64   _end.tv_nsec= 0;
  65   _time(_begin);
  66 }
  67
  68 void Timer::sample()
  69 {
  70   _time(_end);
  71 }
  72
  73 void Timer::offset(int64_t minutes_arg, int64_t seconds_arg, int64_t nanoseconds)
  74 {
  75   reset();
  76   _end= _begin;
  77   _end.tv_sec+= (minutes_arg * 60) +seconds_arg;
  78   _end.tv_nsec+= nanoseconds;
  79 }
  80
  81 int64_t Timer::minutes()
  82 {
  83   struct timespec result;
  84   difference(result);
  85   return int64_t(result.tv_sec / 60);
  86 }
  87
  88 uint64_t Timer::elapsed_milliseconds() const
  89 {
  90   struct timespec temp;
  91   difference(temp);
  92
  93   return temp.tv_sec*1000 +temp.tv_nsec/1000000;
  94 }
  95
  96 void Timer::difference(struct timespec& arg) const
  97 {
  98   if ((_end.tv_nsec -_begin.tv_nsec) < 0)
  99   {
 100     arg.tv_sec= _end.tv_sec -_begin.tv_sec -1;
 101     arg.tv_nsec= 1000000000 +_end.tv_nsec -_begin.tv_nsec;
 102
 103   }
 104   else
 105   {
 106     arg.tv_sec= _end.tv_sec -_begin.tv_sec;
 107     arg.tv_nsec= _end.tv_nsec -_begin.tv_nsec;
 108   }
 109 }
 110
 111 void Timer::_time(struct timespec& ts)
 112 {
 113 #ifdef __MACH__ // OSX lacks clock_gettime()
 114   clock_serv_t _clock_serv;
 115   mach_timespec_t _mach_timespec;
 116   host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &_clock_serv);
 117   clock_get_time(_clock_serv, &_mach_timespec);
 118   mach_port_deallocate(mach_task_self(), _clock_serv);
 119   ts.tv_sec= _mach_timespec.tv_sec;
 120   ts.tv_nsec= _mach_timespec.tv_nsec;
 121 #elif defined(_WIN32)
 122   ts.tv_sec= time(NULL);
 123   ts.tv_nsec= 0;
 124 #else
 125   clock_gettime(CLOCK_REALTIME, &ts);
 126 #endif
 127 }
 128
 129 std::ostream& operator<<(std::ostream& output, const libtest::Timer& arg)
 130 {
 131   struct timespec temp;
 132   arg.difference(temp);
 133
 134   if (temp.tv_sec > 60)
 135   {
 136     output << temp.tv_sec / 60;
 137     output << "." << temp.tv_sec % 60;
 138   }
 139   else
 140   {
 141     output << temp.tv_sec;
 142   }
 143
 144   output << ":";
 145   output << std::setfill('0') << std::setw(9) << temp.tv_nsec;
 146
 147   return output;
 148 }
 149
 150 } // namespace libtest