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/*! \internal \file
 *
 * \brief May be used to implement PME-PP GPU comm interfaces for non-GPU builds.
 *
 * Currently, reports and exits if any of the interfaces are called.
 * Needed to satisfy compiler on systems, where CUDA is not available.
 *
 * \author Alan Gray <alang@nvidia.com>
 *
 * \ingroup module_ewald
 */
#include "gmxpre.h"

#include "config.h"

#include "gromacs/ewald/pme_pp_comm_gpu.h"
#include "gromacs/utility/gmxassert.h"
#include "gromacs/utility/gmxmpi.h"

#if !GMX_GPU_CUDA && !GMX_GPU_SYCL

namespace gmx
{

/*!\brief \internal Impl class stub. */
class PmePpCommGpu::Impl
{
};

/*!\brief Constructor stub. */
PmePpCommGpu::PmePpCommGpu(MPI_Comm /* comm */,
                           int /* pmeRank */,
                           gmx::HostVector<gmx::RVec>* /* pmeCpuForceBuffer */,
                           const DeviceContext& /* deviceContext */,
                           const DeviceStream& /* deviceStream */) :
    impl_(nullptr)
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
}

PmePpCommGpu::~PmePpCommGpu() = default;

/*!\brief init PME-PP GPU communication stub */
//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
void PmePpCommGpu::reinit(int /* size */)
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication initialization was called instead of the "
               "correct implementation.");
}

//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
void PmePpCommGpu::receiveForceFromPme(RVec* /* recvPtr */, int /* recvSize */, bool /* receivePmeForceToGpu */)
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
}

//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
void PmePpCommGpu::sendCoordinatesToPmeFromGpu(DeviceBuffer<RVec> /* sendPtr */,
                                               int /* sendSize */,
                                               GpuEventSynchronizer* /* coordinatesOnDeviceEvent */)
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
}

//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
void PmePpCommGpu::sendCoordinatesToPmeFromCpu(RVec* /* sendPtr */, int /* sendSize */)
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
}

//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
DeviceBuffer<gmx::RVec> PmePpCommGpu::getGpuForceStagingPtr()
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
    return DeviceBuffer<gmx::RVec>{};
}

//NOLINTNEXTLINE(readability-convert-member-functions-to-static)
GpuEventSynchronizer* PmePpCommGpu::getForcesReadySynchronizer()
{
    GMX_ASSERT(!impl_,
               "A CPU stub for PME-PP GPU communication was called instead of the correct "
               "implementation.");
    return nullptr;
}

} // namespace gmx

#endif // !GMX_GPU_CUDA && !GMX_GPU_SYCL
