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/* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __BODYSYSTEMCUDA_H__
#define __BODYSYSTEMCUDA_H__
#include "bodysystem.h"
template <typename T>
struct DeviceData {
T *dPos[2]; // mapped host pointers
T *dVel;
cudaEvent_t event;
unsigned int offset;
unsigned int numBodies;
};
// CUDA BodySystem: runs on the GPU
template <typename T>
class BodySystemCUDA : public BodySystem<T> {
public:
BodySystemCUDA(unsigned int numBodies, unsigned int numDevices,
unsigned int blockSize, bool usePBO, bool useSysMem = false);
virtual ~BodySystemCUDA();
virtual void loadTipsyFile(const std::string &filename);
virtual void update(T deltaTime);
virtual void setSoftening(T softening);
virtual void setDamping(T damping);
virtual T *getArray(BodyArray array);
virtual void setArray(BodyArray array, const T *data);
virtual unsigned int getCurrentReadBuffer() const {
return m_pbo[m_currentRead];
}
virtual unsigned int getNumBodies() const { return m_numBodies; }
protected: // methods
BodySystemCUDA() {}
virtual void _initialize(int numBodies);
virtual void _finalize();
protected: // data
unsigned int m_numBodies;
unsigned int m_numDevices;
bool m_bInitialized;
// Host data
T *m_hPos[2];
T *m_hVel;
DeviceData<T> *m_deviceData;
bool m_bUsePBO;
bool m_bUseSysMem;
unsigned int m_SMVersion;
T m_damping;
unsigned int m_pbo[2];
cudaGraphicsResource *m_pGRes[2];
unsigned int m_currentRead;
unsigned int m_currentWrite;
unsigned int m_blockSize;
};
#include "bodysystemcuda_impl.h"
#endif // __BODYSYSTEMCUDA_H__
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