1 // Copyright 2021 gRPC authors. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef GRPC_SRC_CORE_EXT_TRANSPORT_BINDER_CLIENT_CONNECTION_ID_GENERATOR_H 16 #define GRPC_SRC_CORE_EXT_TRANSPORT_BINDER_CLIENT_CONNECTION_ID_GENERATOR_H 17 18 #include <grpc/support/port_platform.h> 19 20 #include <map> 21 22 #include "absl/strings/string_view.h" 23 24 #include "src/core/lib/gprpp/sync.h" 25 26 namespace grpc_binder { 27 28 // Generates somewhat human-readable unique identifiers from package name and 29 // class name. We will generate a Id that only contains unreserved URI 30 // characters (uppercase and lowercase letters, decimal digits, hyphen, period, 31 // underscore, and tilde). 32 class ConnectionIdGenerator { 33 public: 34 std::string Generate(absl::string_view uri); 35 36 private: 37 // Our generated Id need to fit in unix socket path length limit. We use 100 38 // here to be safe. 39 const size_t kPathLengthLimit = 100; 40 41 grpc_core::Mutex m_; 42 // Every generated identifier will followed by the value of this counter to 43 // make sure every generated id is unique. 44 int count_ ABSL_GUARDED_BY(m_); 45 }; 46 47 ConnectionIdGenerator* GetConnectionIdGenerator(); 48 49 } // namespace grpc_binder 50 51 #endif // GRPC_SRC_CORE_EXT_TRANSPORT_BINDER_CLIENT_CONNECTION_ID_GENERATOR_H 52