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Diffstat (limited to '3rdParty/Boost/src/boost/timer.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/timer.hpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/timer.hpp b/3rdParty/Boost/src/boost/timer.hpp new file mode 100644 index 0000000..1e3571e --- /dev/null +++ b/3rdParty/Boost/src/boost/timer.hpp @@ -0,0 +1,72 @@ +// boost timer.hpp header file ---------------------------------------------// + +// Copyright Beman Dawes 1994-99. Distributed under the Boost +// Software License, Version 1.0. (See accompanying file +// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + +// See http://www.boost.org/libs/timer for documentation. + +// Revision History +// 01 Apr 01 Modified to use new <boost/limits.hpp> header. (JMaddock) +// 12 Jan 01 Change to inline implementation to allow use without library +// builds. See docs for more rationale. (Beman Dawes) +// 25 Sep 99 elapsed_max() and elapsed_min() added (John Maddock) +// 16 Jul 99 Second beta +// 6 Jul 99 Initial boost version + +#ifndef BOOST_TIMER_HPP +#define BOOST_TIMER_HPP + +#include <boost/config.hpp> +#include <ctime> +#include <boost/limits.hpp> + +# ifdef BOOST_NO_STDC_NAMESPACE + namespace std { using ::clock_t; using ::clock; } +# endif + + +namespace boost { + +// timer -------------------------------------------------------------------// + +// A timer object measures elapsed time. + +// It is recommended that implementations measure wall clock rather than CPU +// time since the intended use is performance measurement on systems where +// total elapsed time is more important than just process or CPU time. + +// Warnings: The maximum measurable elapsed time may well be only 596.5+ hours +// due to implementation limitations. The accuracy of timings depends on the +// accuracy of timing information provided by the underlying platform, and +// this varies a great deal from platform to platform. + +class timer +{ + public: + timer() { _start_time = std::clock(); } // postcondition: elapsed()==0 +// timer( const timer& src ); // post: elapsed()==src.elapsed() +// ~timer(){} +// timer& operator=( const timer& src ); // post: elapsed()==src.elapsed() + void restart() { _start_time = std::clock(); } // post: elapsed()==0 + double elapsed() const // return elapsed time in seconds + { return double(std::clock() - _start_time) / CLOCKS_PER_SEC; } + + double elapsed_max() const // return estimated maximum value for elapsed() + // Portability warning: elapsed_max() may return too high a value on systems + // where std::clock_t overflows or resets at surprising values. + { + return (double((std::numeric_limits<std::clock_t>::max)()) + - double(_start_time)) / double(CLOCKS_PER_SEC); + } + + double elapsed_min() const // return minimum value for elapsed() + { return double(1)/double(CLOCKS_PER_SEC); } + + private: + std::clock_t _start_time; +}; // timer + +} // namespace boost + +#endif // BOOST_TIMER_HPP |