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/* Copyright 2015 Google Inc. 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.
==============================================================================*/
#include "tensorflow/core/common_runtime/session_factory.h"
#include <unordered_map>
#include "tensorflow/core/platform/logging.h"
#include "tensorflow/core/platform/port.h"
namespace tensorflow {
namespace {
static mutex* get_session_factory_lock() {
static mutex session_factory_lock;
return &session_factory_lock;
}
typedef std::unordered_map<string, SessionFactory*> SessionFactories;
SessionFactories* session_factories() {
static SessionFactories* factories = new SessionFactories;
return factories;
}
} // namespace
void SessionFactory::Register(const string& runtime_type,
SessionFactory* factory) {
mutex_lock l(*get_session_factory_lock());
if (!session_factories()->insert({runtime_type, factory}).second) {
LOG(ERROR) << "Two session factories are being registered "
<< "under" << runtime_type;
}
}
SessionFactory* SessionFactory::GetFactory(const string& runtime_type) {
mutex_lock l(*get_session_factory_lock()); // could use reader lock
auto it = session_factories()->find(runtime_type);
if (it == session_factories()->end()) {
return nullptr;
}
return it->second;
}
} // namespace tensorflow
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