CUDA: pinned_array_like, pinned_zeroes, pinned_ones, etc. would be handy

[gmarkall]

Being able to do things like:

# a is some np.ndarray
pinned_a = cuda.pinned_array_like(a)

# As opposed to `my_zs = cuda.pinned_array(10); my_zs[:] = 0`
my_zs = cuda.pinned_zeros(10)

# As opposed to `my_zs = cuda.pinned_array(10); my_zs[:] = 1`
my_ones = cuda.pinned_ones(10)

In general if we could create pinned arrays in more ways similar to how NumPy ndarray objects can be created, this would provide a slightly nicer API to work with.

[stuartarchibald]

This would be nice, marked as a feature request, thanks.