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| 1 | +#=============================================================================== |
| 2 | +# Copyright 2023 Intel Corporation |
| 3 | +# |
| 4 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +# you may not use this file except in compliance with the License. |
| 6 | +# You may obtain a copy of the License at |
| 7 | +# |
| 8 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +# |
| 10 | +# Unless required by applicable law or agreed to in writing, software |
| 11 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +# See the License for the specific language governing permissions and |
| 14 | +# limitations under the License. |
| 15 | +#=============================================================================== |
| 16 | + |
| 17 | +from functools import wraps |
| 18 | + |
| 19 | +try: |
| 20 | + from sklearnex._device_offload import (_get_global_queue, |
| 21 | + _transfer_to_host, |
| 22 | + _copy_to_usm) |
| 23 | + _sklearnex_available = True |
| 24 | +except ImportError: |
| 25 | + import logging |
| 26 | + logging.warning('Device support requires ' |
| 27 | + 'Intel(R) Extension for Scikit-learn*.') |
| 28 | + _sklearnex_available = False |
| 29 | + |
| 30 | + |
| 31 | +def _get_host_inputs(*args, **kwargs): |
| 32 | + q = _get_global_queue() |
| 33 | + q, hostargs = _transfer_to_host(q, *args) |
| 34 | + q, hostvalues = _transfer_to_host(q, *kwargs.values()) |
| 35 | + hostkwargs = dict(zip(kwargs.keys(), hostvalues)) |
| 36 | + return q, hostargs, hostkwargs |
| 37 | + |
| 38 | + |
| 39 | +def _extract_usm_iface(*args, **kwargs): |
| 40 | + allargs = (*args, *kwargs.values()) |
| 41 | + if len(allargs) == 0: |
| 42 | + return None |
| 43 | + return getattr(allargs[0], |
| 44 | + '__sycl_usm_array_interface__', |
| 45 | + None) |
| 46 | + |
| 47 | + |
| 48 | +def _run_on_device(func, obj=None, *args, **kwargs): |
| 49 | + if obj is not None: |
| 50 | + return func(obj, *args, **kwargs) |
| 51 | + return func(*args, **kwargs) |
| 52 | + |
| 53 | + |
| 54 | +def support_usm_ndarray(freefunc=False): |
| 55 | + def decorator(func): |
| 56 | + def wrapper_impl(obj, *args, **kwargs): |
| 57 | + if _sklearnex_available: |
| 58 | + usm_iface = _extract_usm_iface(*args, **kwargs) |
| 59 | + data_queue, hostargs, hostkwargs = _get_host_inputs(*args, **kwargs) |
| 60 | + hostkwargs['queue'] = data_queue |
| 61 | + result = _run_on_device(func, obj, *hostargs, **hostkwargs) |
| 62 | + if usm_iface is not None and hasattr(result, '__array_interface__'): |
| 63 | + return _copy_to_usm(data_queue, result) |
| 64 | + return result |
| 65 | + return _run_on_device(func, obj, *args, **kwargs) |
| 66 | + |
| 67 | + if freefunc: |
| 68 | + @wraps(func) |
| 69 | + def wrapper_free(*args, **kwargs): |
| 70 | + return wrapper_impl(None, *args, **kwargs) |
| 71 | + return wrapper_free |
| 72 | + |
| 73 | + @wraps(func) |
| 74 | + def wrapper_with_self(self, *args, **kwargs): |
| 75 | + return wrapper_impl(self, *args, **kwargs) |
| 76 | + return wrapper_with_self |
| 77 | + return decorator |
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