1/* Copyright 2016 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#ifndef TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_WORKER_CACHE_PARTIAL_H_
17#define TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_WORKER_CACHE_PARTIAL_H_
18
19#include <string>
20#include <unordered_map>
21
22#include "tensorflow/core/distributed_runtime/worker_cache.h"
23#include "tensorflow/core/platform/mutex.h"
24#include "tensorflow/core/platform/thread_annotations.h"
25#include "tensorflow/core/platform/types.h"
26#include "tensorflow/core/protobuf/worker.pb.h"
27
28namespace tensorflow {
29
30// Implements the part of the interface that caches and returns remote
31// device status attributes.
32class WorkerCachePartial : public WorkerCacheInterface {
33 public:
34 bool GetDeviceLocalityNonBlocking(const string& device,
35 DeviceLocality* locality) override;
36
37 void GetDeviceLocalityAsync(const string& device, DeviceLocality* locality,
38 StatusCallback) override;
39
40 ~WorkerCachePartial() override {}
41
42 // Clear all entries from the DeviceStatus cache.
43 void FlushStatusCache();
44
45 private:
46 mutex mu_;
47
48 // Initiate a GetStatusAsync to the remote task named by "task", and
49 // update the cache with all the DeviceAttributes reported.
50 Status RefreshDeviceStatus(const string& device_name);
51
52 typedef std::unordered_map<string, DeviceAttributes> StatusMap;
53 StatusMap device_status_cache_ TF_GUARDED_BY(mu_);
54};
55
56} // namespace tensorflow
57#endif // TENSORFLOW_CORE_DISTRIBUTED_RUNTIME_WORKER_CACHE_PARTIAL_H_
58