1/* Copyright 2019 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/framework/logging.h"
17
18#include <iostream>
19
20#include "tensorflow/core/lib/strings/str_util.h"
21#include "tensorflow/core/lib/strings/strcat.h"
22
23namespace tensorflow {
24
25namespace logging {
26
27typedef std::vector<void (*)(const char*)> Listeners;
28
29Listeners* GetListeners() {
30 static Listeners* listeners = new Listeners;
31 return listeners;
32}
33
34bool RegisterListener(void (*listener)(const char*)) {
35 GetListeners()->push_back(listener);
36 return true;
37}
38
39bool LogToListeners(string msg, string end) {
40 auto listeners = logging::GetListeners();
41 if (listeners->empty()) {
42 return false;
43 }
44
45 string ended_msg = strings::StrCat(msg, end);
46
47 for (auto& listener : *listeners) {
48 listener(ended_msg.c_str());
49 }
50
51 return true;
52}
53
54} // end namespace logging
55
56} // end namespace tensorflow
57