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Warning, file /include/corecel/sys/Stopwatch.hh was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file corecel/sys/Stopwatch.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include <chrono> 0010 0011 #include "corecel/Types.hh" 0012 0013 namespace celeritas 0014 { 0015 //---------------------------------------------------------------------------// 0016 /*! 0017 * Simple timer. 0018 * 0019 * The stopwatch starts counting upward at construction and can be reset by 0020 * assigning a new stopwatch instance. 0021 * 0022 * \code 0023 Stopwatch get_elapsed_time; 0024 // ... 0025 double time = get_elapsed_time(); 0026 // Reset the stopwatch 0027 get_elapsed_time = {}; 0028 \endcode 0029 */ 0030 class Stopwatch 0031 { 0032 public: 0033 // Start the count at construction 0034 inline Stopwatch(); 0035 0036 // Get the current elapsed time [s] 0037 inline double operator()() const; 0038 0039 private: 0040 using Clock = std::chrono::high_resolution_clock; 0041 using TimePoint = Clock::time_point; 0042 using Duration = Clock::duration; 0043 0044 TimePoint start_; 0045 }; 0046 0047 //---------------------------------------------------------------------------// 0048 // INLINE DEFINITIONS 0049 //---------------------------------------------------------------------------// 0050 /*! 0051 * Start the count at construction. 0052 */ 0053 Stopwatch::Stopwatch() : start_(Clock::now()) {} 0054 0055 //---------------------------------------------------------------------------// 0056 /*! 0057 * Get the current elapsed time in seconds. 0058 */ 0059 double Stopwatch::operator()() const 0060 { 0061 using DurationSec = std::chrono::duration<double>; 0062 0063 auto duration = Clock::now() - start_; 0064 return std::chrono::duration_cast<DurationSec>(duration).count(); 0065 } 0066 0067 //---------------------------------------------------------------------------// 0068 } // namespace celeritas
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