1 /* 2 * Copyright 2019 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "fcp/tensorflow/host_object.h" 18 19 #include <utility> 20 21 #include "fcp/base/monitoring.h" 22 23 namespace fcp { 24 25 namespace host_object_internal { 26 TryLookup(RandomToken token)27std::optional<std::shared_ptr<void>> HostObjectRegistryImpl::TryLookup( 28 RandomToken token) { 29 std::shared_ptr<void> p = nullptr; 30 31 { 32 absl::ReaderMutexLock lock{&mutex_}; 33 auto it = objects_.find(token); 34 if (it != objects_.end()) { 35 p = it->second; 36 } 37 } 38 39 if (p == nullptr) { 40 return std::nullopt; 41 } else { 42 return p; 43 } 44 } 45 Register(RandomToken token,std::shared_ptr<void> p)46void HostObjectRegistryImpl::Register(RandomToken token, 47 std::shared_ptr<void> p) { 48 absl::WriterMutexLock lock{&mutex_}; 49 auto r = objects_.insert({token, std::move(p)}); 50 FCP_CHECK(r.second) 51 << "An object has already been registered with the provided token"; 52 } 53 Unregister(RandomToken token)54void HostObjectRegistryImpl::Unregister(RandomToken token) { 55 absl::WriterMutexLock lock{&mutex_}; 56 size_t erased = objects_.erase(token); 57 FCP_CHECK(erased == 1) 58 << "An object is not currently registered for the provided token"; 59 } 60 61 } // namespace host_object_internal 62 63 } // namespace fcp 64