Buffer

class lluvia.core.Buffer

allocationInfo

copy(self, Buffer output=None)

Copies the content of this buffer into output.

If output is None, a new buffer is created in the same memory as this one and with the same usage flags.

Parameters

outputBuffer. Defaults to None.: Buffer where the content of this buffer will be copied to. Its size must be equal as this buffer.

Returns

outputBuffer.: If output parameter is None, returns a new Buffer object, otherwise returns the same output object.

fromHost(self, ndarray input)

Copies the content of a Numpy array to this buffer.

Parameters

inputnumpy.ndarray.: Input array. Its size in bytes (input.nbytes) must be equal to this buffer size.

Raises

ValueErrorif the size of the input array in bytes is different: to this buffer size.

isMappable

memory

session

size

toHost(self, ndarray output=None, dtype=np.uint8)

Copies the content of this buffer into a numpy host array.

Parameters

outputnumpy.ndarray. Defaults to None.: Numpy array where the memory content of this buffer will be copied to. If None, a new Numpy array will be created with the same size in bytes as this buffer.
dtypenumpy.dtype. Defaults to numpy.uint8.: Data type of the returned array.

Returns

outputa new numpy array if input parameter output was None: or the same output object otherwise.

Raises

RuntimeErrorif the buffer is not mappable to host-visible memory.: This might be caused by another object mapping the same memory page as this one or because the memory this buffer was created from is not mappable to host-visible memory, e.g., memories created with ‘DeviceLocal’ flag.
ValueErrorif output is different than None but its size in bytes: output.nbytes is different than this buffer’s size.

usageFlags