code: def cudaMemcpy_htod(dst, src, count):
      
  
      status = _libcudart.cudaMemcpy(dst, src,
                                     ctypes.c_size_t(count),
                                     cudaMemcpyHostToDevice)
      cudaCheckStatus(status)
docs: Copy memory from host to device.
  
      Copy data from host memory to device memory.
  
      Parameters
      ----------
      dst : ctypes pointer
          Device memory pointer.
      src : ctypes pointer
          Host memory pointer.
      count : int
          Number of bytes to copy.