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37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2024 The Eigen Authors
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifdef _WIN32
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#include <cstdint>
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#else
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#include <ctime>
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#endif
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extern "C" {
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double dsecnd_();
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}
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// Elapsed CPU Time in seconds.
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double dsecnd_() {
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#ifdef _WIN32
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// GetProcessTimes() uses 100-nanosecond time units.
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FILETIME creation_time, exit_time, kernel_time, user_time;
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GetProcessTimes(GetCurrentProcess(), &creation_time, &exit_time, &kernel_time, &user_time);
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ULARGE_INTEGER user;
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user.HighPart = user_time.dwHighDateTime;
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user.LowPart = user_time.dwLowDateTime;
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uint64_t time_100ns = user.QuadPart;
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return static_cast<double>(time_100ns) / 10000000.0;
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#else
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return static_cast<double>(std::clock()) / static_cast<double>(CLOCKS_PER_SEC);
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#endif
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}
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