// $Id$
//
-// Copyright (C) 2007
-// Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
-// Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
+// Copyright (C) 2007
+// Fraunhofer Institute for Open Communication Systems (FOKUS)
+// Competence Center NETwork research (NET), St. Augustin, GERMANY
// Stefan Bund <g0dil@berlios.de>
//
// This program is free software; you can redistribute it and/or modify
\brief ClockService inline non-template implementation */
// Custom includes
-#include "boost/date_time/posix_time/posix_time_types.hpp"
+#include <time.h>
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+#include "../Utils/Exception.hh"
#define prefix_ inline
///////////////////////////////cci.p///////////////////////////////////////
prefix_ senf::ClockService::clock_type senf::ClockService::now()
{
- return instance().now_m();
+ struct timespec spec;
+ if (clock_gettime(CLOCK_MONOTONIC, &spec) < 0)
+ SENF_THROW_SYSTEM_EXCEPTION("clock_gettime()");
+ return spec.tv_sec * 1000000000LL + spec.tv_nsec;
}
+////////////////////////////////////////
+// private members
+
+prefix_ senf::ClockService::clock_type senf::ClockService::clock_m(abstime_type time)
+{
+ if (now() - baseClock_ > 1000000000ll)
+ restart_m();
+ boost::posix_time::time_duration delta (time - baseAbstime_);
+ return baseClock_ + clock_type( delta.ticks() )
+ * clock_type( 1000000000UL / boost::posix_time::time_duration::ticks_per_second() );
+}
+
+prefix_ senf::ClockService::abstime_type senf::ClockService::abstime_m(clock_type clock)
+{
+ if (now() - baseClock_ > 1000000000ll)
+ restart_m();
+#ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
+ return baseAbstime_ + boost::posix_time::nanoseconds(clock-baseClock_);
+#else
+ return baseAbstime_ + boost::posix_time::microseconds((clock-baseClock_+500)/1000);
+#endif
+}
+
+prefix_ senf::ClockService::ClockService()
+{
+ restart_m();
+}
+
+prefix_ void senf::ClockService::restart_m()
+{
+ baseAbstime_ = boost::posix_time::microsec_clock::universal_time();
+ baseClock_ = now();
+}
+
+// public members
+
prefix_ senf::ClockService::abstime_type senf::ClockService::abstime(clock_type clock)
{
return instance().abstime_m(clock);
}
+prefix_ senf::ClockService::reltime_type senf::ClockService::reltime(clock_type clock)
+{
+#ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
+ return boost::posix_time::nanoseconds(clock);
+#else
+ return boost::posix_time::microseconds((clock+500)/1000);
+#endif
+}
+
prefix_ senf::ClockService::clock_type senf::ClockService::clock(abstime_type time)
{
return instance().clock_m(time);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::from_time_t(time_t const & time)
+{
+ return clock( boost::posix_time::from_time_t(time) );
+}
+
+prefix_ senf::ClockService::clock_type senf::ClockService::nanoseconds(int64_type v)
{
return v;
}
-prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::microseconds(int64_type v)
{
return v * nanoseconds(1000);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::milliseconds(int64_type v)
{
return v * microseconds(1000);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::seconds(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::seconds(int64_type v)
{
return v * milliseconds(1000);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::minutes(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::minutes(int64_type v)
{
return v * seconds(60);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::hours(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::hours(int64_type v)
{
return v * minutes(60);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::days(clock_type v)
+prefix_ senf::ClockService::clock_type senf::ClockService::days(int64_type v)
{
return v * hours(24);
}
-prefix_ void senf::ClockService::restart()
+prefix_ senf::ClockService::clock_type senf::ClockService::in_nanoseconds(int64_type v)
{
- instance().restart_m();
+ return v;
}
-////////////////////////////////////////
-// private members
-
-prefix_ senf::ClockService::clock_type senf::ClockService::now_m()
+prefix_ senf::ClockService::clock_type senf::ClockService::in_microseconds(int64_type v)
{
- // We want to make the normal case (no skew) really fast. This first 'checkSkew' *might*
- // transiently fail if a SIGALRM is delivered in the midst of the test. updateSkew will
- // therefore block signals and do the check again to make sure.
- //
- // The opposite case (the test returns 'false' even though it should return 'true') is so highly
- // improbable that it is treated as academic. (it will be catched by the next SIGALRM)
+ return v / nanoseconds(1000);
+}
- boost::posix_time::ptime time (boost::posix_time::microsec_clock::universal_time());
- if (checkSkew(time))
- updateSkew(time);
-
- // 'clock' will pick up the corrected base_ value if needed.
- return clock_m(time);
+prefix_ senf::ClockService::clock_type senf::ClockService::in_milliseconds(int64_type v)
+{
+ return v / microseconds(1000);
}
-prefix_ senf::ClockService::abstime_type senf::ClockService::abstime_m(clock_type clock)
+prefix_ senf::ClockService::clock_type senf::ClockService::in_seconds(int64_type v)
{
-#ifdef BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG
- return base_ + boost::posix_time::nanoseconds(clock);
-#else
- return base_ + boost::posix_time::microseconds((clock+500)/1000);
-#endif
+ return v / milliseconds(1000);
}
-prefix_ senf::ClockService::clock_type senf::ClockService::clock_m(abstime_type time)
+prefix_ senf::ClockService::clock_type senf::ClockService::in_minutes(int64_type v)
{
- ///\fixme What happens, if base_ is changed in SIGALRM while reading it here ?
+ return v / seconds(60);
+}
- // Idea: Have *two* base values: one is written by the SIGALRM handler, the other is only
- // Written by synchronous code. If they differ, we block signals, copy over and continue. If
- // they transiently differ because we are reading the SIGALRM value while it is being changed
- // this does not matter: We will then still copy it over.
+prefix_ senf::ClockService::clock_type senf::ClockService::in_hours(int64_type v)
+{
+ return v / minutes(60);
+}
- boost::posix_time::time_duration delta (time - base_);
- return clock_type( delta.ticks() )
- * clock_type( 1000000000UL / boost::posix_time::time_duration::ticks_per_second() );
+prefix_ senf::ClockService::clock_type senf::ClockService::in_days(int64_type v)
+{
+ return v / hours(24);
}
-prefix_ bool senf::ClockService::checkSkew(boost::posix_time::ptime time)
+prefix_ senf::ClockService::clock_type senf::ClockService::from_timeval(timeval const & time)
{
- boost::posix_time::ptime h (heartbeat_); // reduce chance for race condition
- return time < h || (time - h) > boost::posix_time::seconds(2*CheckInterval);
+ return from_time_t(time.tv_sec) + ClockService::microseconds(time.tv_usec);
}
-prefix_ void senf::ClockService::clockSkew(boost::posix_time::ptime time,
- boost::posix_time::ptime expected)
+prefix_ void senf::ClockService::restart()
{
- base_ += (time - expected);
+ instance().restart_m();
}
///////////////////////////////cci.e///////////////////////////////////////
projects / senf.git / blobdiff