mirror of
https://github.com/NVIDIA/cuda-samples.git
synced 2024-11-28 14:19:15 +08:00
103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
|
/* Copyright (c) 2021, 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,
|
||
|
|
bool useP2P = true, int deviceId = 0);
|
||
|
|
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;
|
||
|
|
int m_devID;
|
||
|
|
|
||
|
|
// Host data
|
||
|
|
T *m_hPos[2];
|
||
|
|
T *m_hVel;
|
||
|
|
|
||
|
|
DeviceData<T> *m_deviceData;
|
||
|
|
|
||
|
|
bool m_bUsePBO;
|
||
|
|
bool m_bUseSysMem;
|
||
|
|
bool m_bUseP2P;
|
||
|
|
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__
|