CUDAStream.h

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* (c) Copyright 2023-2024 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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* granted to it by virtue of its status as an Intergovernmental Organization        *
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#pragma once
// Gaudi
#include <Gaudi/AsynchronousAlgorithm.h>
 
// CUDA
#ifndef __CUDACC__
#  include <cuda_runtime.h>
#endif
 
namespace Gaudi::CUDA {
  class Stream {
  private:
    cudaStream_t                        m_stream;
    const Gaudi::AsynchronousAlgorithm* m_parent;
    int                                 m_dependents;
 
  public:
    Stream( const Gaudi::AsynchronousAlgorithm* parent );
    ~Stream();
 
    inline operator cudaStream_t() { return m_stream; }
 
    inline const Gaudi::AsynchronousAlgorithm* parent() { return m_parent; }
 
    StatusCode await();
 
    void registerDependency() { ++m_dependents; }
 
    void removeDependency() { --m_dependents; }
  };
} // namespace Gaudi::CUDA