Buffers.h

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/*
 * Project: RooFit
 * Authors:
 *   Jonas Rembser, CERN  11/2021
 *
 * Copyright (c) 2021, CERN
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted according to the terms
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)
 */
 
#ifndef RooFit_Detail_Buffers_h
#define RooFit_Detail_Buffers_h
 
#include <RConfig.h>
 
#ifdef ROOFIT_CUDA
#include <RooFit/Detail/CudaInterface.h>
#endif
 
#include <cstddef>
#include <memory>
 
namespace RooFit {
namespace Detail {
 
class AbsBuffer {
public:
   virtual ~AbsBuffer() = default;
 
   virtual double const *cpuReadPtr() const = 0;
   virtual double const *gpuReadPtr() const = 0;
 
   virtual double *cpuWritePtr() = 0;
   virtual double *gpuWritePtr() = 0;
};
 
struct BufferQueuesMaps;
 
class BufferManager {
 
public:
   BufferManager();
   ~BufferManager();
 
   std::unique_ptr<AbsBuffer> makeScalarBuffer();
   std::unique_ptr<AbsBuffer> makeCpuBuffer(std::size_t size);
#ifdef ROOFIT_CUDA
   std::unique_ptr<AbsBuffer> makeGpuBuffer(std::size_t size);
   std::unique_ptr<AbsBuffer>
   makePinnedBuffer(std::size_t size, RooFit::Detail::CudaInterface::CudaStream *stream = nullptr);
#endif
 
private:
   std::unique_ptr<BufferQueuesMaps> _queuesMaps;
};
 
} // end namespace Detail
} // end namespace RooFit
 
#endif