src/gromacs/gpu_utils/pinning.h

   1 /*
   2  * This file is part of the GROMACS molecular simulation package.
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   4  * Copyright (c) 2017, by the GROMACS development team, led by
   5  * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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  35 /*! \internal \file
  36  * \brief Declares functions for pinning memory to be suitable for
  37  * efficient GPU transfers on CUDA.
  38  *
  39  * \author Mark Abraham <mark.j.abraham@gmail.com>
  40  */
  41
  42 #include <cstddef>
  43
  44 namespace gmx
  45 {
  46
  47 /*! \brief Pin the allocation to physical memory.
  48  *
  49  * Requires that \c pointer is not nullptr.
  50  *
  51  * Does not throw.
  52  */
  53 void pinBuffer(void *pointer, std::size_t numBytes) noexcept;
  54
  55 /*! \brief Unpin the allocation.
  56  *
  57  * Requries that \c pointer is not nullptr and was previously pinned
  58  * with pinBuffer().
  59  *
  60  * Does not throw.
  61  */
  62 void unpinBuffer(void *pointer) noexcept;
  63
  64 } // namespace gmx