chore: import upstream snapshot with attribution

tools/tensorflow-quantization/tensorflow_quantization/global_config.py

@@ -0,0 +1,64 @@
+#
+# SPDX-FileCopyrightText: Copyright (c) 1993-2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# 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.
+#
+
+
+"""
+This module holds the quantization config class object that is accessed globally by library modules.
+DIRECT USE OF THIS MODULE BY USER IS PROHIBITED.
+"""
+
+# List that holds quantization config class object, Length is always one!
+# Object is added automatically on class creation
+G_CONFIG_OBJECT = []
+
+
+def add_config_object(config_object: "BaseConfig") -> None:
+    """
+    Add instance of quantize config class to the global list.
+    Args:
+        config_object : Instance of one of four quantize config class
+    """
+    assert (
+            len(G_CONFIG_OBJECT) == 0
+    ), "Looks like previous quatize object is alive. Did you call clear() on the object?"
+    G_CONFIG_OBJECT.append(config_object)
+
+
+def remove_config_object() -> None:
+    """
+    Remove instance of quantize config class from the global list.
+    """
+    if G_CONFIG_OBJECT:
+        G_CONFIG_OBJECT.clear()
+
+
+def get_config_object() -> "BaseConfig":
+    """
+    Return quantize config class object
+    """
+    assert (
+            len(G_CONFIG_OBJECT) == 1
+    ), "Have you created quantize config object before calling `quantize_model`?"
+    if G_CONFIG_OBJECT:
+        return G_CONFIG_OBJECT[0]
+
+
+def is_config_object_created() -> bool:
+    """
+    Sanity check function for whether quantize config class object is created.
+    """
+    return len(G_CONFIG_OBJECT) == 1