90 lines
3.4 KiB
Python
90 lines
3.4 KiB
Python
|
# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
|
||
|
|
#
|
||
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
# you may not use this file except in compliance with the License.
|
||
|
|
# You may obtain a copy of the License at
|
||
|
|
#
|
||
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
#
|
||
|
|
# Unless required by applicable law or agreed to in writing, software
|
||
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
# See the License for the specific language governing permissions and
|
||
|
|
# limitations under the License.
|
||
|
|
# ==============================================================================
|
||
|
|
"""Decorator to overrides the gradient for a function."""
|
||
|
|
|
||
|
|
from tensorflow.python.client import pywrap_tf_session
|
||
|
|
from tensorflow.python.framework import cpp_shape_inference_pb2
|
||
|
|
from tensorflow.python.framework import dtypes
|
||
|
|
from tensorflow.python.types import core
|
||
|
|
from tensorflow.python.util import compat
|
||
|
|
|
||
|
|
|
||
|
|
def get_resource_handle_data(graph_op):
|
||
|
|
assert (isinstance(graph_op, core.Symbol)
|
||
|
|
and not isinstance(graph_op, core.Value))
|
||
|
|
|
||
|
|
with graph_op.graph._c_graph.get() as c_graph: # pylint: disable=protected-access
|
||
|
|
handle_data = pywrap_tf_session.GetHandleShapeAndType(
|
||
|
|
c_graph, graph_op._as_tf_output()) # pylint: disable=protected-access
|
||
|
|
|
||
|
|
return cpp_shape_inference_pb2.CppShapeInferenceResult.HandleData.FromString(
|
||
|
|
compat.as_bytes(handle_data))
|
||
|
|
|
||
|
|
|
||
|
|
def get_handle_data(source_t):
|
||
|
|
"""Obtains HandleData from a tensor."""
|
||
|
|
if isinstance(source_t, core.Value):
|
||
|
|
return source_t._handle_data # pylint: disable=protected-access
|
||
|
|
return get_resource_handle_data(source_t)
|
||
|
|
|
||
|
|
|
||
|
|
def copy_handle_data(source_t, target_t):
|
||
|
|
"""Copies HandleData for variant and resource type tensors if available.
|
||
|
|
|
||
|
|
The CppShapeInferenceResult::HandleData proto contains information about the
|
||
|
|
shapes and types of the element tensors of resource/variant type tensors.
|
||
|
|
We need to copy this across function boundaries, i.e., when capturing a
|
||
|
|
placeholder or when returning a function tensor as output. If we don't do this
|
||
|
|
the element tensors will have unknown shapes, e.g., if a TensorList variant
|
||
|
|
tensor is captured as a placeholder, elements popped from that list would have
|
||
|
|
unknown shape.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
source_t: The tensor to copy HandleData from.
|
||
|
|
target_t: The tensor to copy HandleData to.
|
||
|
|
"""
|
||
|
|
if (target_t.dtype == dtypes.resource or
|
||
|
|
target_t.dtype == dtypes.variant):
|
||
|
|
handle_data = get_handle_data(source_t)
|
||
|
|
set_handle_data(target_t, handle_data)
|
||
|
|
|
||
|
|
|
||
|
|
def set_handle_data(target_t, handle_data):
|
||
|
|
"""Sets handle data on the giver tensor."""
|
||
|
|
if (
|
||
|
|
handle_data is None
|
||
|
|
or not handle_data.is_set
|
||
|
|
or not handle_data.shape_and_type
|
||
|
|
):
|
||
|
|
return
|
||
|
|
|
||
|
|
# pylint: disable=protected-access
|
||
|
|
if isinstance(target_t, core.Value):
|
||
|
|
target_t._handle_data = handle_data
|
||
|
|
return
|
||
|
|
with target_t.graph._c_graph.get() as c_graph:
|
||
|
|
pywrap_tf_session.SetHandleShapeAndType(c_graph, target_t._as_tf_output(),
|
||
|
|
handle_data.SerializeToString())
|
||
|
|
# pylint: enable=protected-access
|
||
|
|
|
||
|
|
|
||
|
|
def create_handle_data(shape, dtype):
|
||
|
|
handle_data = cpp_shape_inference_pb2.CppShapeInferenceResult.HandleData()
|
||
|
|
handle_data.is_set = True
|
||
|
|
handle_data.shape_and_type.append(
|
||
|
|
cpp_shape_inference_pb2.CppShapeInferenceResult.HandleShapeAndType(
|
||
|
|
shape=shape.as_proto(), dtype=dtype.as_datatype_enum))
|
||
|
|
return handle_data
|