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