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File indexing completed on 2025-01-18 09:54:50
0001 //----------------------------------*-C++-*----------------------------------// 0002 // Copyright 2020-2024 UT-Battelle, LLC, and other Celeritas developers. 0003 // See the top-level COPYRIGHT file for details. 0004 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0005 //---------------------------------------------------------------------------// 0006 //! \file corecel/sys/Stopwatch.hh 0007 //---------------------------------------------------------------------------// 0008 #pragma once 0009 0010 #include <chrono> 0011 0012 #include "corecel/Types.hh" 0013 0014 namespace celeritas 0015 { 0016 //---------------------------------------------------------------------------// 0017 /*! 0018 * Simple timer. 0019 * 0020 * The stopwatch starts counting upward at construction and can be reset by 0021 * assigning a new stopwatch instance. 0022 * 0023 * \code 0024 Stopwatch get_elapsed_time; 0025 // ... 0026 double time = get_elapsed_time(); 0027 // Reset the stopwatch 0028 get_elapsed_time = {}; 0029 \endcode 0030 */ 0031 class Stopwatch 0032 { 0033 public: 0034 // Start the count at construction 0035 inline Stopwatch(); 0036 0037 // Get the current elapsed time [s] 0038 inline double operator()() const; 0039 0040 private: 0041 using Clock = std::chrono::high_resolution_clock; 0042 using TimePoint = Clock::time_point; 0043 using Duration = Clock::duration; 0044 0045 TimePoint start_; 0046 }; 0047 0048 //---------------------------------------------------------------------------// 0049 // INLINE DEFINITIONS 0050 //---------------------------------------------------------------------------// 0051 /*! 0052 * Start the count at construction. 0053 */ 0054 Stopwatch::Stopwatch() : start_(Clock::now()) {} 0055 0056 //---------------------------------------------------------------------------// 0057 /*! 0058 * Get the current elapsed time in seconds. 0059 */ 0060 double Stopwatch::operator()() const 0061 { 0062 using DurationSec = std::chrono::duration<double>; 0063 0064 auto duration = Clock::now() - start_; 0065 return std::chrono::duration_cast<DurationSec>(duration).count(); 0066 } 0067 0068 //---------------------------------------------------------------------------// 0069 } // namespace celeritas
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