In this exercise you will learn how to create buffers to manage data and
accessors to access the data within a kernel function.
Allocate memory on the host for your input and output data variables and assign values to the inputs.
In SYCL buffers are used to manage data across the host and device(s).
Construct a buffer to manage your input and output data. The parameters to
construct a buffer are a pointer to the host data and a 1 dimensional range
of 1 to represent a single value. The element type and dimensionality can be
inferred from the pointer and the range.
In SYCL accessors are used to declare data dependencies to a SYCL kernel function as well as to access the data within a SYCL kernel function.
Construct an accessor for each of the buffers to access the data of each within
the kernel function. The parameters to construct an accessor are the buffer
and the handler.
Declare a SYCL kernel function using the single_task command provide a lambda
as the kernel function. The kernel function should use the operator[] of the
accessor objects to read from the inputs and write the sum to the output. As
each accessor is only accessing a single element you can simply specify 0.
You can construct a temporary buffer that doesn’t copy back on destruction by
initializing it with just a range and no host pointer.
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