senf/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 (clock == 0)
  60         return abstime_type();
  61     if (now() - baseClock_ > 1000000000ll)
  62         restart_m();
  63 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  64     return baseAbstime_ + boost::posix_time::nanoseconds(clock-baseClock_);
  65 #else
  66     return baseAbstime_ + boost::posix_time::microseconds((clock-baseClock_+500)/1000);
  67 #endif
  68 }
  69
  70 prefix_ senf::ClockService::ClockService()
  71 {
  72     restart_m();
  73 }
  74
  75 prefix_ void senf::ClockService::restart_m()
  76 {
  77     baseAbstime_ = boost::posix_time::microsec_clock::universal_time();
  78     baseClock_ = now();
  79 }
  80
  81 // public members
  82
  83 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime(clock_type clock)
  84 {
  85     return instance().abstime_m(clock);
  86 }
  87
  88 prefix_ senf::ClockService::reltime_type senf::ClockService::reltime(clock_type clock)
  89 {
  90 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  91     return boost::posix_time::nanoseconds(clock);
  92 #else
  93     return  boost::posix_time::microseconds((clock+500)/1000);
  94 #endif
  95 }
  96
  97 prefix_ senf::ClockService::clock_type senf::ClockService::clock(abstime_type time)
  98 {
  99     return instance().clock_m(time);
 100 }
 101
 102 prefix_ senf::ClockService::clock_type senf::ClockService::from_time_t(time_t const & time)
 103 {
 104     return clock( boost::posix_time::from_time_t(time) );
 105 }
 106
 107 prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(int64_type v)
 108 {
 109     return v;
 110 }
 111
 112 prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(int64_type v)
 113 {
 114     return v * nanoseconds(1000);
 115 }
 116
 117 prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(int64_type v)
 118 {
 119     return v * microseconds(1000);
 120 }
 121
 122 prefix_ senf::ClockService::clock_type senf::ClockService::seconds(int64_type v)
 123 {
 124     return v * milliseconds(1000);
 125 }
 126
 127 prefix_ senf::ClockService::clock_type senf::ClockService::minutes(int64_type v)
 128 {
 129     return v * seconds(60);
 130 }
 131
 132 prefix_ senf::ClockService::clock_type senf::ClockService::hours(int64_type v)
 133 {
 134     return v * minutes(60);
 135 }
 136
 137 prefix_ senf::ClockService::clock_type senf::ClockService::days(int64_type v)
 138 {
 139     return v * hours(24);
 140 }
 141
 142 prefix_ senf::ClockService::clock_type senf::ClockService::in_nanoseconds(int64_type v)
 143 {
 144     return v;
 145 }
 146
 147 prefix_ senf::ClockService::clock_type senf::ClockService::in_microseconds(int64_type v)
 148 {
 149     return v / nanoseconds(1000);
 150 }
 151
 152 prefix_ senf::ClockService::clock_type senf::ClockService::in_milliseconds(int64_type v)
 153 {
 154     return v / microseconds(1000);
 155 }
 156
 157 prefix_ senf::ClockService::clock_type senf::ClockService::in_seconds(int64_type v)
 158 {
 159     return v / milliseconds(1000);
 160 }
 161
 162 prefix_ senf::ClockService::clock_type senf::ClockService::in_minutes(int64_type v)
 163 {
 164     return v / seconds(60);
 165 }
 166
 167 prefix_ senf::ClockService::clock_type senf::ClockService::in_hours(int64_type v)
 168 {
 169     return v / minutes(60);
 170 }
 171
 172 prefix_ senf::ClockService::clock_type senf::ClockService::in_days(int64_type v)
 173 {
 174     return v / hours(24);
 175 }
 176
 177 prefix_ senf::ClockService::clock_type senf::ClockService::from_timeval(timeval const & time)
 178 {
 179     return from_time_t(time.tv_sec) + ClockService::microseconds(time.tv_usec);
 180 }
 181
 182 prefix_ void senf::ClockService::restart()
 183 {
 184     instance().restart_m();
 185 }
 186
 187 ///////////////////////////////cci.e///////////////////////////////////////
 188 #undef prefix_
 189
 190 \f
 191 // Local Variables:
 192 // mode: c++
 193 // fill-column: 100
 194 // comment-column: 40
 195 // c-file-style: "senf"
 196 // indent-tabs-mode: nil
 197 // ispell-local-dictionary: "american"
 198 // compile-command: "scons -u test"
 199 // End: