Function copy_htod_async 

pub fn copy_htod_async<T: Copy>(
    dst: &mut DeviceBuffer<T>,
    src: &PinnedBuffer<T>,
    stream: &Stream,
) -> CudaResult<()>

Asynchronously copies data from a pinned host buffer into a device buffer.

The copy is enqueued on stream and may not be complete when this function returns. The caller must not modify src or read dst until the stream has been synchronised.

Using a PinnedBuffer as the source guarantees that the host memory is page-locked, which is required for correct async DMA transfers.

Errors

• CudaError::InvalidValue if src.len() != dst.len().
• Other driver errors from cuMemcpyHtoDAsync_v2.