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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#include <catch2/catch_timer.hpp>
#include <chrono>
namespace Catch {
namespace {
static auto getCurrentNanosecondsSinceEpoch() -> uint64_t {
return std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
}
} // end unnamed namespace
void Timer::start() {
m_nanoseconds = getCurrentNanosecondsSinceEpoch();
}
auto Timer::getElapsedNanoseconds() const -> uint64_t {
return getCurrentNanosecondsSinceEpoch() - m_nanoseconds;
}
auto Timer::getElapsedMicroseconds() const -> uint64_t {
return getElapsedNanoseconds()/1000;
}
auto Timer::getElapsedMilliseconds() const -> unsigned int {
return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
}
auto Timer::getElapsedSeconds() const -> double {
return static_cast<double>(getElapsedMicroseconds())/1000000.0;
}
} // namespace Catch
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