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 <senf/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 namespace senf { namespace scheduler { ClockService::clock_type now(); } }
  49
  50 prefix_ senf::ClockService::clock_type senf::ClockService::clock_m(abstime_type time)
  51 {
  52     if (scheduler::now() - baseClock_ > 1000000000ll)
  53         restart_m();
  54     boost::posix_time::time_duration delta (time - baseAbstime_);
  55     return baseClock_ + clock_type( delta.ticks() )
  56         * clock_type( 1000000000UL / boost::posix_time::time_duration::ticks_per_second() );
  57 }
  58
  59 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime_m(clock_type clock)
  60 {
  61     if (clock == 0)
  62         return abstime_type();
  63     if (scheduler::now() - baseClock_ > 1000000000ll)
  64         restart_m();
  65 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  66     return baseAbstime_ + boost::posix_time::nanoseconds(clock-baseClock_);
  67 #else
  68     return baseAbstime_ + boost::posix_time::microseconds((clock-baseClock_+500)/1000);
  69 #endif
  70 }
  71
  72 prefix_ senf::ClockService::ClockService()
  73 {
  74     restart_m();
  75 }
  76
  77 prefix_ void senf::ClockService::restart_m()
  78 {
  79     baseAbstime_ = boost::posix_time::microsec_clock::universal_time();
  80     baseClock_ = now();
  81 }
  82
  83 // public members
  84
  85 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime(clock_type clock)
  86 {
  87     return instance().abstime_m(clock);
  88 }
  89
  90 prefix_ senf::ClockService::reltime_type senf::ClockService::reltime(clock_type clock)
  91 {
  92 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  93     return boost::posix_time::nanoseconds(clock);
  94 #else
  95     return  boost::posix_time::microseconds((clock+500)/1000);
  96 #endif
  97 }
  98
  99 prefix_ senf::ClockService::clock_type senf::ClockService::clock(abstime_type time)
 100 {
 101     return instance().clock_m(time);
 102 }
 103
 104 prefix_ senf::ClockService::clock_type senf::ClockService::from_time_t(time_t const & time)
 105 {
 106     return clock( boost::posix_time::from_time_t(time) );
 107 }
 108
 109 prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(int64_type v)
 110 {
 111     return v;
 112 }
 113
 114 prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(int64_type v)
 115 {
 116     return v * nanoseconds(1000);
 117 }
 118
 119 prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(int64_type v)
 120 {
 121     return v * microseconds(1000);
 122 }
 123
 124 prefix_ senf::ClockService::clock_type senf::ClockService::seconds(int64_type v)
 125 {
 126     return v * milliseconds(1000);
 127 }
 128
 129 prefix_ senf::ClockService::clock_type senf::ClockService::minutes(int64_type v)
 130 {
 131     return v * seconds(60);
 132 }
 133
 134 prefix_ senf::ClockService::clock_type senf::ClockService::hours(int64_type v)
 135 {
 136     return v * minutes(60);
 137 }
 138
 139 prefix_ senf::ClockService::clock_type senf::ClockService::days(int64_type v)
 140 {
 141     return v * hours(24);
 142 }
 143
 144 prefix_ senf::ClockService::clock_type senf::ClockService::in_nanoseconds(int64_type v)
 145 {
 146     return v;
 147 }
 148
 149 prefix_ senf::ClockService::clock_type senf::ClockService::in_microseconds(int64_type v)
 150 {
 151     return v / nanoseconds(1000);
 152 }
 153
 154 prefix_ senf::ClockService::clock_type senf::ClockService::in_milliseconds(int64_type v)
 155 {
 156     return v / microseconds(1000);
 157 }
 158
 159 prefix_ senf::ClockService::clock_type senf::ClockService::in_seconds(int64_type v)
 160 {
 161     return v / milliseconds(1000);
 162 }
 163
 164 prefix_ senf::ClockService::clock_type senf::ClockService::in_minutes(int64_type v)
 165 {
 166     return v / seconds(60);
 167 }
 168
 169 prefix_ senf::ClockService::clock_type senf::ClockService::in_hours(int64_type v)
 170 {
 171     return v / minutes(60);
 172 }
 173
 174 prefix_ senf::ClockService::clock_type senf::ClockService::in_days(int64_type v)
 175 {
 176     return v / hours(24);
 177 }
 178
 179 prefix_ senf::ClockService::clock_type senf::ClockService::from_timeval(timeval const & time)
 180 {
 181     return from_time_t(time.tv_sec) + microseconds(time.tv_usec);
 182 }
 183
 184 prefix_ void senf::ClockService::restart()
 185 {
 186     instance().restart_m();
 187 }
 188
 189 ///////////////////////////////cci.e///////////////////////////////////////
 190 #undef prefix_
 191
 192 \f
 193 // Local Variables:
 194 // mode: c++
 195 // fill-column: 100
 196 // comment-column: 40
 197 // c-file-style: "senf"
 198 // indent-tabs-mode: nil
 199 // ispell-local-dictionary: "american"
 200 // compile-command: "scons -u test"
 201 // End: