time: use std::chrono for nanoseconds query
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27
time.cpp
27
time.cpp
@ -11,24 +11,37 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "time.hpp"
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#include "./time.hpp"
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#include "debug.hpp"
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#include "log.hpp"
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#include "platform.hpp"
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#include "cast.hpp"
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#include "./debug.hpp"
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#include "./log.hpp"
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#include "./platform.hpp"
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#include "./cast.hpp"
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#include <chrono>
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using namespace util;
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using util::delta_clock;
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///////////////////////////////////////////////////////////////////////////////
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static const uint64_t SECOND = 1'000'000'000UL;
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static const uint64_t MILLISECOND = 1'000'000UL;
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///////////////////////////////////////////////////////////////////////////////
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uintmax_t
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util::nanoseconds (void)
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{
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return std::chrono::duration_cast<
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std::chrono::duration<uintmax_t, std::nano>
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> (
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std::chrono::high_resolution_clock::now ().time_since_epoch ()
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).count ();
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}
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///////////////////////////////////////////////////////////////////////////////
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delta_clock::delta_clock ():
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time { util::nanoseconds (), util::nanoseconds () }
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13
time.hpp
13
time.hpp
@ -11,20 +11,25 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_TIME_HPP
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#define __UTIL_TIME_HPP
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#include <chrono>
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#include <cstdint>
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#include <string>
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#include "stats.hpp"
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#include "./stats.hpp"
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namespace util {
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// ------------------------------------------------------------------------
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uint64_t nanoseconds (void);
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uintmax_t nanoseconds (void);
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template <typename T>
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void sleep (std::chrono::duration<T,std::nano>);
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void sleep (uint64_t ns);
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// ------------------------------------------------------------------------
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@ -84,4 +89,6 @@ namespace util {
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};
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}
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#include "./time.ipp"
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#endif // __UTIL_TIME_HPP
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28
time.ipp
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28
time.ipp
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@ -0,0 +1,28 @@
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2016 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_TIME_IPP
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#define __UTIL_TIME_IPP
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template <typename T>
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void
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util::sleep (std::chrono::duration<T,std::nano> dt)
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{
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auto nano = std::chrono::duration_cast<std::chrono::nanoseconds> (dt);
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sleep (nano.count ());
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}
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#endif
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@ -11,31 +11,16 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "time.hpp"
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#include "./time.hpp"
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#include "cast.hpp"
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#include "./cast.hpp"
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#include <ctime>
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static const uint64_t SECOND = 1'000'000'000UL;
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static const uint64_t MILLISECOND = 1'000'000UL;
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///////////////////////////////////////////////////////////////////////////////
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uint64_t
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util::nanoseconds (void)
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{
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struct timespec t;
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clock_gettime (CLOCK_MONOTONIC, &t);
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CHECK_GT (t.tv_sec, 0);
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CHECK_GT (t.tv_nsec, 0);
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return static_cast<uint64_t> (t.tv_sec) * SECOND + static_cast<uint64_t> (t.tv_nsec);
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}
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static constexpr uint64_t SECOND = 1'000'000'000UL;
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///////////////////////////////////////////////////////////////////////////////
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void
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@ -11,37 +11,16 @@
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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* Copyright 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "time.hpp"
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#include "platform.hpp"
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#if !defined(PLATFORM_WIN32)
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#error
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#endif
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#include <windows.h>
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static const uint64_t SECOND = 1'000'000'000UL;
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static const uint64_t MILLISECOND = 1'000'000UL;
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///////////////////////////////////////////////////////////////////////////////
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uint64_t
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util::nanoseconds (void)
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{
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LARGE_INTEGER freq, count;
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QueryPerformanceFrequency (&freq);
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QueryPerformanceCounter (&count);
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return count.QuadPart * SECOND / freq.QuadPart;
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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util::sleep (uint64_t ns)
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{
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Sleep (ns / MILLISECOND);
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Sleep (ns / 1'000'000UL);
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}
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