1/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#include "tensorflow/core/tpu/tpu_executor_api.h"
17
18namespace tensorflow {
19namespace tpu {
20
21TfTpu_ExecutorApiFn* ExecutorApiFn() {
22 static TfTpu_ExecutorApiFn executor_api_fn;
23 return &executor_api_fn;
24}
25
26bool IsStreamExecutorEnabled(TfTpu_ExecutorApiFn* executor_api_fn) {
27 if (!IsInitialized(executor_api_fn)) {
28 return false;
29 }
30 bool is_se_enabled = false;
31 auto* tpu_platform = executor_api_fn->TpuPlatform_NewFn();
32 if (tpu_platform != nullptr) {
33 is_se_enabled = true;
34 executor_api_fn->TpuPlatform_FreeFn(tpu_platform);
35 }
36 return is_se_enabled;
37}
38
39bool IsInitialized(TfTpu_ExecutorApiFn* executor_api_fn) {
40 // Check if an arbitrary function pointer is initialized. We could check more
41 // functions or add an explicit 'initialized' field to TfTpu_ExecutorApiFn,
42 // but this works well enough.
43 return executor_api_fn->TpuPlatform_NewFn != nullptr;
44}
45
46} // namespace tpu
47} // namespace tensorflow
48