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// -*- C++ -*- Time-stamp: <2011-05-02 12:27:16 ptr> |
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|
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/* |
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* Copyright (c) 2002, 2006-2011 |
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* Petr Ovtchenkov |
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* |
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* This material is provided "as is", with absolutely no warranty expressed |
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* or implied. Any use is at your own risk. |
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* |
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* Permission to use or copy this software for any purpose is hereby granted |
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* without fee, provided the above notices are retained on all copies. |
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* Permission to modify the code and to distribute modified code is granted, |
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* provided the above notices are retained, and a notice that the code was |
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* modified is included with the above copyright notice. |
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* |
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* Derived from original chrono.cc of 'complement' project |
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* [http://complement.sourceforge.net] |
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* to make it close to JTC1/SC22/WG21 C++ 0x working draft |
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* [http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2011/n3291.pdf] |
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*/ |
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|
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#include "stlport_prefix.h" |
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|
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#include <chrono> |
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|
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_STLP_BEGIN_NAMESPACE |
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|
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namespace chrono { |
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|
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const bool system_clock::is_steady = false; |
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|
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system_clock::time_point system_clock::now() /* nothrow */ throw() |
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{ |
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//timeval tv; |
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//::gettimeofday( &tv, 0 ); |
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//return system_time( tv.tv_sec * nanoseconds::ticks_per_second + tv.tv_usec * 1000LL, system_time::_adopt_t() ); |
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|
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#ifdef __unix |
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::timespec tv; |
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clock_gettime( CLOCK_REALTIME, &tv ); |
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|
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return time_point( duration( tv.tv_nsec + tv.tv_sec * period::den ) /* seconds(tv.tv_sec) + nanoseconds(tv.tv_nsec) */ ); |
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#elif defined( WIN32 ) |
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union { |
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FILETIME ft; // 100 ns intervals since Jan 1 1601 (UTC) |
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__int64 t; |
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} ft; |
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GetSystemTimeAsFileTime( &ft.ft ); |
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|
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return time_point( duration( ft.t - 11644473600LL) ); // 60 * 60 * 24 * 134774, 1970 - 1601 |
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#else |
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# error "You should implement OS-dependent precise clock" |
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#endif |
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} |
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|
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time_t system_clock::to_time_t( const system_clock::time_point& t ) /* noexcept */ throw() |
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{ |
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#ifdef __unix |
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return t.time_since_epoch().count() / period::den; |
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#elif defined( WIN32 ) |
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#else |
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# error "You should implement OS-dependent precise clock" |
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#endif |
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} |
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|
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system_clock::time_point system_clock::from_time_t( time_t t ) /* noexcept */ throw() |
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{ |
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#ifdef __unix |
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return time_point( duration_cast<duration>( seconds(t) ) ); |
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#elif defined( WIN32 ) |
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#else |
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# error "You should implement OS-dependent precise clock" |
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#endif |
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} |
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|
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const bool steady_clock::is_steady = true; |
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|
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steady_clock::time_point steady_clock::now() /* nothrow */ throw() |
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{ |
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#ifdef __unix |
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::timespec tv; |
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clock_gettime( CLOCK_MONOTONIC, &tv ); |
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|
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return time_point( duration( tv.tv_nsec + tv.tv_sec * period::den ) /* seconds(tv.tv_sec) + nanoseconds(tv.tv_nsec) */ ); |
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#elif defined( WIN32 ) |
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#else |
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# error "You should implement OS-dependent precise clock" |
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#endif |
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} |
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|
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} // namespace chrono |
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|
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_STLP_END_NAMESPACE |
