o i@sdZddlmZddlmZddlmZddlmZddl m Z Gdd d Z zdd l Z Gd d d Z ddddZWneyIddddZYnwdddZdddZd S) zStream context.) annotations)c_void_p)Any)coredevicec@s.eZdZdZddd Zdd d ZdddZdS) StreamContexta1Represent a stream context in the FFI system. StreamContext helps setup ffi environment stream by python `with` statement. When entering `with` scope, it caches the current environment stream and setup the given new stream. When exiting `with` scope, it recovers the stream to the cached environment stream. Parameters ---------- device The device to which the stream belongs. stream The stream handle. See Also -------- :py:func:`tvm_ffi.use_raw_stream`, :py:func:`tvm_ffi.use_torch_stream` r core.Devicestreamint | c_void_preturnNonecCs||_|j|_||_dS)zs      * # .