68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
///
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/// \author John Farrier
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///
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/// \copyright Copyright 2015, 2016, 2017, 2018. 2019 John Farrier
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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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#include <celero/Print.h>
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#include <celero/Utilities.h>
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#ifdef WIN32
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#include <Windows.h>
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#include <PowrProf.h>
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#endif
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#ifdef max
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#undef max
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#endif
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#include <limits>
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#include <random>
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template <>
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void celero::DoNotOptimizeAway(std::function<void(void)>&& x)
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{
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x();
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// We must always do this test, but it will never pass.
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static auto ttid = std::this_thread::get_id();
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if(ttid == std::thread::id())
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{
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// This forces the value to never be optimized away
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// by taking a reference then using it.
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const auto* p = &x;
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putchar(*reinterpret_cast<const char*>(p));
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// If we do get here, kick out because something has gone wrong.
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std::abort();
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}
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}
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int celero::Random()
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{
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// http://en.cppreference.com/w/cpp/numeric/random/uniform_int_distribution
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// Will be used to obtain a seed for the random number engine
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static std::random_device rd;
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// Standard mersenne_twister_engine seeded with rd()
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static std::mt19937 gen(rd());
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static std::uniform_int_distribution<> dis(std::numeric_limits<int>::lowest(), std::numeric_limits<int>::max());
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return dis(gen);
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}
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