senf/Scheduler/ClockService.cci

   1 // $Id$
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 //
   6 // The contents of this file are subject to the Fraunhofer FOKUS Public License
   7 // Version 1.0 (the "License"); you may not use this file except in compliance
   8 // with the License. You may obtain a copy of the License at
   9 // http://senf.berlios.de/license.html
  10 //
  11 // The Fraunhofer FOKUS Public License Version 1.0 is based on,
  12 // but modifies the Mozilla Public License Version 1.1.
  13 // See the full license text for the amendments.
  14 //
  15 // Software distributed under the License is distributed on an "AS IS" basis,
  16 // WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  17 // for the specific language governing rights and limitations under the License.
  18 //
  19 // The Original Code is Fraunhofer FOKUS code.
  20 //
  21 // The Initial Developer of the Original Code is Fraunhofer-Gesellschaft e.V.
  22 // (registered association), Hansastraße 27 c, 80686 Munich, Germany.
  23 // All Rights Reserved.
  24 //
  25 // Contributor(s):
  26 //   Stefan Bund <g0dil@berlios.de>
  27
  28 /** \file
  29     \brief ClockService inline non-template implementation */
  30
  31 // Custom includes
  32 #include <time.h>
  33 #include <boost/date_time/posix_time/posix_time_types.hpp>
  34 #include <senf/Utils/Exception.hh>
  35
  36 #define prefix_ inline
  37 //-/////////////////////////////////////////////////////////////////////////////////////////////////
  38
  39 //-/////////////////////////////////////////////////////////////////////////////////////////////////
  40 // senf::ClockService
  41
  42 prefix_ senf::ClockService::clock_type senf::ClockService::now()
  43 {
  44     struct timespec spec;
  45     if (clock_gettime(CLOCK_MONOTONIC, &spec) < 0)
  46         SENF_THROW_SYSTEM_EXCEPTION("clock_gettime()");
  47     return spec.tv_sec * 1000000000LL + spec.tv_nsec;
  48 }
  49
  50 //-/////////////////////////////////////////////////////////////////////////////////////////////////
  51 // private members
  52
  53 namespace senf { namespace scheduler { ClockService::clock_type now(); } }
  54
  55 prefix_ senf::ClockService::clock_type senf::ClockService::clock_m(abstime_type time)
  56 {
  57     if (scheduler::now() - baseClock_ > 1000000000ll)
  58         restart_m();
  59     boost::posix_time::time_duration delta (time - baseAbstime_);
  60     return baseClock_ + clock_type( delta.ticks() )
  61         * clock_type( 1000000000UL / boost::posix_time::time_duration::ticks_per_second() );
  62 }
  63
  64 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime_m(clock_type clock)
  65 {
  66     if (clock == 0)
  67         return abstime_type();
  68     if (scheduler::now() - baseClock_ > 1000000000ll)
  69         restart_m();
  70 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  71     return baseAbstime_ + boost::posix_time::nanoseconds(clock-baseClock_);
  72 #else
  73     return baseAbstime_ + boost::posix_time::microseconds((clock-baseClock_+500)/1000);
  74 #endif
  75 }
  76
  77 prefix_ senf::ClockService::ClockService()
  78 {
  79     restart_m();
  80 }
  81
  82 prefix_ void senf::ClockService::restart_m()
  83 {
  84     baseAbstime_ = boost::posix_time::microsec_clock::universal_time();
  85     baseClock_ = now();
  86 }
  87
  88 // public members
  89
  90 prefix_ senf::ClockService::abstime_type senf::ClockService::abstime(clock_type clock)
  91 {
  92     return instance().abstime_m(clock);
  93 }
  94
  95 prefix_ senf::ClockService::reltime_type senf::ClockService::reltime(clock_type clock)
  96 {
  97 #ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
  98     return boost::posix_time::nanoseconds(clock);
  99 #else
 100     return  boost::posix_time::microseconds((clock+500)/1000);
 101 #endif
 102 }
 103
 104 prefix_ senf::ClockService::clock_type senf::ClockService::clock(abstime_type time)
 105 {
 106     return instance().clock_m(time);
 107 }
 108
 109 prefix_ senf::ClockService::clock_type senf::ClockService::from_time_t(time_t const & time)
 110 {
 111     return clock( boost::posix_time::from_time_t(time) );
 112 }
 113
 114 prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(int64_type v)
 115 {
 116     return v;
 117 }
 118
 119 prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(int64_type v)
 120 {
 121     return v * nanoseconds(1000);
 122 }
 123
 124 prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(int64_type v)
 125 {
 126     return v * microseconds(1000);
 127 }
 128
 129 prefix_ senf::ClockService::clock_type senf::ClockService::seconds(int64_type v)
 130 {
 131     return v * milliseconds(1000);
 132 }
 133
 134 prefix_ senf::ClockService::clock_type senf::ClockService::minutes(int64_type v)
 135 {
 136     return v * seconds(60);
 137 }
 138
 139 prefix_ senf::ClockService::clock_type senf::ClockService::hours(int64_type v)
 140 {
 141     return v * minutes(60);
 142 }
 143
 144 prefix_ senf::ClockService::clock_type senf::ClockService::days(int64_type v)
 145 {
 146     return v * hours(24);
 147 }
 148
 149 prefix_ senf::ClockService::clock_type senf::ClockService::in_nanoseconds(int64_type v)
 150 {
 151     return v;
 152 }
 153
 154 prefix_ senf::ClockService::clock_type senf::ClockService::in_microseconds(int64_type v)
 155 {
 156     return v / nanoseconds(1000);
 157 }
 158
 159 prefix_ senf::ClockService::clock_type senf::ClockService::in_milliseconds(int64_type v)
 160 {
 161     return v / microseconds(1000);
 162 }
 163
 164 prefix_ senf::ClockService::clock_type senf::ClockService::in_seconds(int64_type v)
 165 {
 166     return v / milliseconds(1000);
 167 }
 168
 169 prefix_ senf::ClockService::clock_type senf::ClockService::in_minutes(int64_type v)
 170 {
 171     return v / seconds(60);
 172 }
 173
 174 prefix_ senf::ClockService::clock_type senf::ClockService::in_hours(int64_type v)
 175 {
 176     return v / minutes(60);
 177 }
 178
 179 prefix_ senf::ClockService::clock_type senf::ClockService::in_days(int64_type v)
 180 {
 181     return v / hours(24);
 182 }
 183
 184 prefix_ senf::ClockService::clock_type senf::ClockService::from_timeval(timeval const & time)
 185 {
 186     return from_time_t(time.tv_sec) + microseconds(time.tv_usec);
 187 }
 188
 189 prefix_ void senf::ClockService::restart()
 190 {
 191     instance().restart_m();
 192 }
 193
 194 //-/////////////////////////////////////////////////////////////////////////////////////////////////
 195 #undef prefix_
 196
 197 \f
 198 // Local Variables:
 199 // mode: c++
 200 // fill-column: 100
 201 // comment-column: 40
 202 // c-file-style: "senf"
 203 // indent-tabs-mode: nil
 204 // ispell-local-dictionary: "american"
 205 // compile-command: "scons -u test"
 206 // End: