serve_snapshot()

void MayaFlux::Buffers::RelaxationStepProcessor::serve_snapshot ( )

private

Copy the front state buffer to the host and signal RelaxationGridBuffer::snapshot_source(), if a request is pending.

back_buffers are HostVisible | HostCoherent, so download_back_buffer reads mapped_ptr directly with no staging buffer or fenced transfer. The dispatch has completed by this point: submit_and_wait has returned under synchronous submission, and on_dispatch_complete fires under deferred submission.

Definition at line 136 of file RelaxationStepProcessor.cpp.

{
    if (!m_grid->consume_snapshot_request()) {
        return;
    }
 
    const auto& front = m_grid->get_buffer_resources().back_buffers[m_grid->front_index()];
 
    std::vector<uint8_t> bytes(m_grid->get_state_bytes());
    download_back_buffer(front, bytes.data(), bytes.size(), m_snapshot_staging);
 
    m_grid->snapshot_source()->signal(bytes);
}

References MayaFlux::Buffers::download_back_buffer(), m_grid, and m_snapshot_staging.

Referenced by on_dispatch_complete(), and processing_function().

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