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7f94eafc9c
Providing these types tends to "lock in" the precision of the algorithms used in VTK-m. Since we are using templating anyway, our templates should be generic enough to handle difference precision in the data. Usually the appropriate type can be determined by the data provided. In the case where there is no hint on the precision of data to use (for example, in the code that provides coordinates for uniform data), there is a vtkm::FloatDefault.
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014. Los Alamos National Security
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef vtk_m_cont_Timer_h
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#define vtk_m_cont_Timer_h
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#include <vtkm/cont/DeviceAdapter.h>
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namespace vtkm {
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namespace cont {
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/// A class that can be used to time operations in VTK-m that might be occuring
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/// in parallel. You should make sure that the device adapter for the timer
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/// matches that being used to execute algorithms to ensure that the thread
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/// synchronization is correct.
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///
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/// The there is no guaranteed resolution of the time but should generally be
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/// good to about a millisecond.
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///
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template<class Device = VTKM_DEFAULT_DEVICE_ADAPTER_TAG>
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class Timer
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{
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public:
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/// When a timer is constructed, all threads are synchronized and the
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/// current time is marked so that GetElapsedTime returns the number of
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/// seconds elapsed since the construction.
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VTKM_CONT_EXPORT
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Timer() : TimerImplementation() { }
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/// Resets the timer. All further calls to GetElapsedTime will report the
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/// number of seconds elapsed since the call to this. This method
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/// synchronizes all asynchronous operations.
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///
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VTKM_CONT_EXPORT
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void Reset()
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{
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this->TimerImplementation.Reset();
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}
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/// Returns the elapsed time in seconds between the construction of this
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/// class or the last call to Reset and the time this function is called. The
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/// time returned is measured in wall time. GetElapsedTime may be called any
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/// number of times to get the progressive time. This method synchronizes all
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/// asynchronous operations.
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///
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VTKM_CONT_EXPORT
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vtkm::Float64 GetElapsedTime()
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{
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return this->TimerImplementation.GetElapsedTime();
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}
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private:
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/// Some timers are ill-defined when copied, so disallow that for all timers.
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VTKM_CONT_EXPORT Timer(const Timer<Device> &); // Not implemented.
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VTKM_CONT_EXPORT void operator=(const Timer<Device> &); // Not implemented.
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vtkm::cont::DeviceAdapterTimerImplementation<Device>
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TimerImplementation;
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};
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}
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} // namespace vtkm::cont
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#endif //vtk_m_cont_Timer_h
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