Scheduler/ClockService.cci

   1 // $Id$
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief ClockService inline non-template implementation */
  25
  26 // Custom includes
  27 #include <time.h>
  28 #include <boost/date_time/posix_time/posix_time_types.hpp>
  29 #include "../Utils/Exception.hh"
  30
  31 #define prefix_ inline
  32 ///////////////////////////////cci.p///////////////////////////////////////
  33
  34 ///////////////////////////////////////////////////////////////////////////
  35 // senf::ClockService
  36
  37 prefix_ senf::ClockService::clock_type senf::ClockService::now()
  38 {
  39     struct timespec spec;
  40     if (clock_gettime(CLOCK_MONOTONIC, &spec) < 0)
  41         SENF_THROW_SYSTEM_EXCEPTION("clock_gettime()");
  42     return spec.tv_sec * 1000000000LL + spec.tv_nsec;
  43 }
  44
  45 ////////////////////////////////////////
  46 // private members
  47
  48 prefix_ senf::ClockService::clock_type senf::ClockService::clock_m(abstime_type time)
  49 {
  50     if (now() - baseClock_ > 1000000000ll)
  51         restart_m();
  52     boost::posix_time::time_duration delta (time - baseAbstime_);
  53     return baseClock_ + clock_type( delta.ticks() )
  54         * clock_type( 1000000000UL / boost::posix_time::time_duration::ticks_per_second() );
  55 }
  56
  57 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime_m(clock_type clock)
  58 {
  59     if (now() - baseClock_ > 1000000000ll)
  60         restart_m();
  61 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  62     return baseAbstime_ + boost::posix_time::nanoseconds(clock-baseClock_);
  63 #else
  64     return baseAbstime_ + boost::posix_time::microseconds((clock-baseClock_+500)/1000);
  65 #endif
  66 }
  67
  68 prefix_ senf::ClockService::ClockService()
  69 {
  70     restart_m();
  71 }
  72
  73 prefix_ void senf::ClockService::restart_m()
  74 {
  75     baseAbstime_ = boost::posix_time::microsec_clock::universal_time();
  76     baseClock_ = now();
  77 }
  78
  79 // public members
  80
  81 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime(clock_type clock)
  82 {
  83     return instance().abstime_m(clock);
  84 }
  85
  86 prefix_ senf::ClockService::reltime_type senf::ClockService::reltime(clock_type clock)
  87 {
  88 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  89     return boost::posix_time::nanoseconds(clock);
  90 #else
  91     return  boost::posix_time::microseconds((clock+500)/1000);
  92 #endif
  93 }
  94
  95 prefix_ senf::ClockService::clock_type senf::ClockService::clock(abstime_type time)
  96 {
  97     return instance().clock_m(time);
  98 }
  99
 100 prefix_ senf::ClockService::clock_type senf::ClockService::from_time_t(time_t const & time)
 101 {
 102     return clock( boost::posix_time::from_time_t(time) );
 103 }
 104
 105 prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(int64_type v)
 106 {
 107     return v;
 108 }
 109
 110 prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(int64_type v)
 111 {
 112     return v * nanoseconds(1000);
 113 }
 114
 115 prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(int64_type v)
 116 {
 117     return v * microseconds(1000);
 118 }
 119
 120 prefix_ senf::ClockService::clock_type senf::ClockService::seconds(int64_type v)
 121 {
 122     return v * milliseconds(1000);
 123 }
 124
 125 prefix_ senf::ClockService::clock_type senf::ClockService::minutes(int64_type v)
 126 {
 127     return v * seconds(60);
 128 }
 129
 130 prefix_ senf::ClockService::clock_type senf::ClockService::hours(int64_type v)
 131 {
 132     return v * minutes(60);
 133 }
 134
 135 prefix_ senf::ClockService::clock_type senf::ClockService::days(int64_type v)
 136 {
 137     return v * hours(24);
 138 }
 139
 140 prefix_ senf::ClockService::clock_type senf::ClockService::in_nanoseconds(int64_type v)
 141 {
 142     return v;
 143 }
 144
 145 prefix_ senf::ClockService::clock_type senf::ClockService::in_microseconds(int64_type v)
 146 {
 147     return v / nanoseconds(1000);
 148 }
 149
 150 prefix_ senf::ClockService::clock_type senf::ClockService::in_milliseconds(int64_type v)
 151 {
 152     return v / microseconds(1000);
 153 }
 154
 155 prefix_ senf::ClockService::clock_type senf::ClockService::in_seconds(int64_type v)
 156 {
 157     return v / milliseconds(1000);
 158 }
 159
 160 prefix_ senf::ClockService::clock_type senf::ClockService::in_minutes(int64_type v)
 161 {
 162     return v / seconds(60);
 163 }
 164
 165 prefix_ senf::ClockService::clock_type senf::ClockService::in_hours(int64_type v)
 166 {
 167     return v / minutes(60);
 168 }
 169
 170 prefix_ senf::ClockService::clock_type senf::ClockService::in_days(int64_type v)
 171 {
 172     return v / hours(24);
 173 }
 174
 175 prefix_ senf::ClockService::clock_type senf::ClockService::from_timeval(timeval const & time)
 176 {
 177     return from_time_t(time.tv_sec) + ClockService::microseconds(time.tv_usec);
 178 }
 179
 180 prefix_ void senf::ClockService::restart()
 181 {
 182     instance().restart_m();
 183 }
 184
 185 ///////////////////////////////cci.e///////////////////////////////////////
 186 #undef prefix_
 187
 188 \f
 189 // Local Variables:
 190 // mode: c++
 191 // fill-column: 100
 192 // comment-column: 40
 193 // c-file-style: "senf"
 194 // indent-tabs-mode: nil
 195 // ispell-local-dictionary: "american"
 196 // compile-command: "scons -u test"
 197 // End: