1 /* 2 * Copyright (C) 2019 The Android Open Source Project 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 #pragma once 17 18 #include <map> 19 #include <string> 20 #include <unordered_map> 21 #include <utility> 22 #include <vector> 23 24 #include <android-base/result.h> 25 26 #include "linkerconfig/basecontext.h" 27 #include "linkerconfig/configwriter.h" 28 #include "linkerconfig/namespace.h" 29 30 namespace android { 31 namespace linkerconfig { 32 namespace modules { 33 34 // LibProvider is a provider for alias of library requirements. 35 // When "foo" namespace requires "alias" (formatted ":name"), 36 // you would expect 37 // foo.GetLink(<ns>).AddSharedLib(<shared_libs); 38 // which is equivalent to 39 // namespace.foo.link.<ns>.shared_libs = <shared_libs> 40 // The referenced namespace (<ns>) is created via <ns_builder> and added 41 // in the current section. 42 struct LibProvider { 43 std::string ns; 44 std::function<Namespace()> ns_builder; 45 std::vector<std::string> shared_libs; 46 }; 47 48 // LibProviders maps "alias" to one or more LibProviders. 49 using LibProviders = std::unordered_map<std::string, std::vector<LibProvider>>; 50 51 class Section { 52 public: Section(std::string name,std::vector<Namespace> namespaces)53 Section(std::string name, std::vector<Namespace> namespaces) 54 : name_(std::move(name)), namespaces_(std::move(namespaces)) { 55 } 56 57 Section(const Section&) = delete; 58 Section(Section&&) = default; 59 60 void WriteConfig(ConfigWriter& writer); 61 std::vector<std::string> GetBinaryPaths(); 62 std::string GetName(); 63 64 void Resolve(const BaseContext& ctx, const LibProviders& lib_providers = {}); 65 Namespace* GetNamespace(const std::string& namespace_name); 66 67 template <class _Function> ForEachNamespaces(_Function f)68 void ForEachNamespaces(_Function f) { 69 for (auto& ns : namespaces_) { 70 f(ns); 71 } 72 } 73 74 private: 75 const std::string name_; 76 std::vector<Namespace> namespaces_; 77 }; 78 } // namespace modules 79 } // namespace linkerconfig 80 } // namespace android 81