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Merge pull request #2578 from opensim-org/stopwatch
Add class Stopwatch
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,89 @@ | ||
| #ifndef OPENSIM_STOPWATCH_H_ | ||
| #define OPENSIM_STOPWATCH_H_ | ||
| /* -------------------------------------------------------------------------- * | ||
| * OpenSim: Stopwatch.h * | ||
| * -------------------------------------------------------------------------- * | ||
| * The OpenSim API is a toolkit for musculoskeletal modeling and simulation. * | ||
| * See http://opensim.stanford.edu and the NOTICE file for more information. * | ||
| * OpenSim is developed at Stanford University and supported by the US * | ||
| * National Institutes of Health (U54 GM072970, R24 HD065690) and by DARPA * | ||
| * through the Warrior Web program. * | ||
| * * | ||
| * Copyright (c) 2005-2019 Stanford University and the Authors * | ||
| * Author(s): Christopher Dembia * | ||
| * * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); you may * | ||
| * not use this file except in compliance with the License. You may obtain a * | ||
| * copy of the License at http://www.apache.org/licenses/LICENSE-2.0. * | ||
| * * | ||
| * Unless required by applicable law or agreed to in writing, software * | ||
| * distributed under the License is distributed on an "AS IS" BASIS, * | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * | ||
| * See the License for the specific language governing permissions and * | ||
| * limitations under the License. * | ||
| * -------------------------------------------------------------------------- */ | ||
|
|
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| /// Record and report elapsed real time ("clock" or "wall" time) in seconds. | ||
| class Stopwatch { | ||
| public: | ||
| /// This stores the start time as the current time. | ||
| Stopwatch() { reset(); } | ||
| /// Reset the start time to the current time. | ||
| void reset() { m_startTime = SimTK::realTimeInNs(); } | ||
| /// Return the amount of time that has elapsed since this object was | ||
| /// constructed or since reset() has been called. | ||
| double getElapsedTime() const { | ||
| return SimTK::realTime() - SimTK::nsToSec(m_startTime); | ||
| } | ||
| /// Get elapsed time in nanoseconds. See SimTK::realTimeInNs() for more | ||
| /// information. | ||
| long long getElapsedTimeInNs() const { | ||
| return SimTK::realTimeInNs() - m_startTime; | ||
| } | ||
| /// This provides the elapsed time as a formatted string (using format()). | ||
| std::string getElapsedTimeFormatted() const { | ||
| return formatNs(getElapsedTimeInNs()); | ||
| } | ||
| /// Format the provided elapsed time in nanoseconds into a string. | ||
| /// The time may be converted into seconds, milliseconds, or microseconds. | ||
| /// Additionally, if the time is greater or equal to 60 seconds, the time in | ||
| /// hours and/or minutes is also added to the string. | ||
| /// Usually, you can call getElapsedTimeFormatted() instead of calling this | ||
| /// function directly. If you call this function directly, use | ||
| /// getElapsedTimeInNs() to get a time in nanoseconds (rather than | ||
| /// getElapsedTime()). | ||
| static std::string formatNs(const long long& nanoseconds) { | ||
| std::stringstream ss; | ||
| double seconds = SimTK::nsToSec(nanoseconds); | ||
| int secRounded = (int)std::round(seconds); | ||
| if (seconds > 1) | ||
| ss << secRounded << " second(s)"; | ||
| else if (nanoseconds >= 1000000) | ||
| ss << nanoseconds / 1000000 << " millisecond(s)"; | ||
| else if (nanoseconds >= 1000) | ||
| ss << nanoseconds / 1000 << " microsecond(s)"; | ||
| else | ||
| ss << nanoseconds << " nanosecond(s)"; | ||
| int minutes = secRounded / 60; | ||
| int hours = minutes / 60; | ||
| if (minutes || hours) { | ||
| ss << " ("; | ||
| if (hours) { | ||
| ss << hours << " hour(s), "; | ||
| ss << minutes % 60 << " minute(s), "; | ||
| ss << secRounded % 60 << " second(s)"; | ||
| } else { | ||
| ss << minutes % 60 << " minute(s), "; | ||
| ss << secRounded % 60 << " second(s)"; | ||
| } | ||
| ss << ")"; | ||
| } | ||
| return ss.str(); | ||
| } | ||
|
|
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| private: | ||
| long long m_startTime; | ||
| }; | ||
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| #endif // OPENSIM_STOPWATCH_H_ |
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