1 /* 2 * Copyright (C) 2017 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 17 #include "AST.h" 18 19 #include "Coordinator.h" 20 #include "EnumType.h" 21 #include "HidlTypeAssertion.h" 22 #include "Interface.h" 23 #include "Method.h" 24 #include "Reference.h" 25 #include "ScalarType.h" 26 #include "Scope.h" 27 28 #include <android-base/logging.h> 29 #include <hidl-util/Formatter.h> 30 #include <hidl-util/StringHelper.h> 31 #include <algorithm> 32 #include <string> 33 #include <vector> 34 35 namespace android { 36 37 void AST::generateCppAdapterHeader(Formatter& out) const { 38 const std::string klassName = AST::isInterface() ? getInterface()->getAdapterName() : "Atypes"; 39 const std::string guard = makeHeaderGuard(klassName, true /* indicateGenerated */); 40 41 out << "#ifndef " << guard << "\n"; 42 out << "#define " << guard << "\n\n"; 43 44 if (AST::isInterface()) { 45 generateCppPackageInclude(out, mPackage, getInterface()->localName()); 46 47 enterLeaveNamespace(out, true /* enter */); 48 out.endl(); 49 50 const std::string mockName = getInterface()->fqName().cppName(); 51 52 out << "class " << klassName << " : public " << mockName << " "; 53 out.block([&] { 54 out << "public:\n"; 55 out << "typedef " << mockName << " Pure;\n"; 56 57 out << klassName << "(::android::sp<" << mockName << "> impl);\n"; 58 59 generateMethods(out, [&](const Method* method, const Interface* /* interface */) { 60 if (method->isHidlReserved()) { 61 return; 62 } 63 64 out << "virtual "; 65 method->generateCppSignature(out); 66 out << " override;\n"; 67 }); 68 out << "private:\n"; 69 out << "::android::sp<" << mockName << "> mImpl;\n"; 70 71 }) << ";\n\n"; 72 73 enterLeaveNamespace(out, false /* enter */); 74 } else { 75 out << "// no adapters for types.hal\n"; 76 } 77 78 out << "#endif // " << guard << "\n"; 79 } 80 81 void AST::generateCppAdapterSource(Formatter& out) const { 82 const std::string klassName = AST::isInterface() ? getInterface()->getAdapterName() : "Atypes"; 83 84 generateCppPackageInclude(out, mPackage, klassName); 85 86 if (AST::isInterface()) { 87 out << "#include <hidladapter/HidlBinderAdapter.h>\n"; 88 generateCppPackageInclude(out, mPackage, getInterface()->localName()); 89 90 std::set<FQName> allImportedNames; 91 getAllImportedNames(&allImportedNames); 92 for (const auto& item : allImportedNames) { 93 if (item.name() == "types") { 94 continue; 95 } 96 generateCppPackageInclude(out, item, item.getInterfaceAdapterName()); 97 } 98 99 out.endl(); 100 101 enterLeaveNamespace(out, true /* enter */); 102 out.endl(); 103 104 const std::string mockName = getInterface()->fqName().cppName(); 105 106 out << klassName << "::" << klassName << "(::android::sp<" << mockName 107 << "> impl) : mImpl(impl) {}"; 108 109 generateMethods(out, [&](const Method* method, const Interface* /* interface */) { 110 generateAdapterMethod(out, method); 111 }); 112 113 enterLeaveNamespace(out, false /* enter */); 114 out.endl(); 115 } else { 116 out << "// no adapters for types.hal\n"; 117 } 118 } 119 120 void AST::generateAdapterMethod(Formatter& out, const Method* method) const { 121 if (method->isHidlReserved()) { 122 return; 123 } 124 125 const auto adapt = [](Formatter& out, const std::string& var, const Type* type) { 126 if (!type->isInterface()) { 127 out << var; 128 return; 129 } 130 131 // TODO(b/66900959): if we are creating the adapter for a 1.1 IFoo 132 // and we are using a method that takes/returns a 1.0 Callback, but 133 // there exists a 1.1 Callback (or other subclass that is depended 134 // on by this module), then wrap with the adapter subclass adapter 135 // IFF that callback is a subclass. However, if the callback 136 // is 1.0 ICallback, then wrap with a 1.0 adapter. 137 138 const Interface* interface = static_cast<const Interface*>(type); 139 out << "static_cast<::android::sp<" << interface->fqName().cppName() << ">>(" 140 << interface->fqName().cppName() << "::castFrom(" 141 << "::android::hardware::details::adaptWithDefault(" 142 << "static_cast<::android::sp<" << interface->fqName().cppName() << ">>(" << var 143 << "), [&] { return new " << interface->fqName().getInterfaceAdapterFqName().cppName() 144 << "(" << var << "); })))"; 145 }; 146 147 const std::string klassName = getInterface()->getAdapterName(); 148 149 method->generateCppSignature(out, klassName); 150 out.block([&] { 151 bool hasCallback = !method->canElideCallback() && !method->results().empty(); 152 153 if (hasCallback) { 154 out << method->name() << "_cb _hidl_cb_wrapped = [&]("; 155 method->emitCppResultSignature(out); 156 out << ") "; 157 out.block([&] { 158 out << "return _hidl_cb(\n"; 159 out.indent([&]() { 160 out.join(method->results().begin(), method->results().end(), ",\n", 161 [&](auto arg) { adapt(out, arg->name(), arg->get()); }); 162 }); 163 out << ");\n"; 164 }); 165 out << ";\n"; 166 } 167 168 out << "auto _hidl_out = mImpl->" << method->name() << "(\n"; 169 out.indent([&]() { 170 out.join(method->args().begin(), method->args().end(), ",\n", 171 [&](auto arg) { adapt(out, arg->name(), arg->get()); }); 172 if (hasCallback) { 173 if (!method->args().empty()) { 174 out << ",\n"; 175 } 176 out << "_hidl_cb_wrapped"; 177 } 178 }); 179 out << ");\n"; 180 181 const auto elidedCallback = method->canElideCallback(); 182 if (elidedCallback) { 183 out.sIf("!_hidl_out.isOkUnchecked()", [&] { out << "return _hidl_out;\n"; }); 184 out << "return "; 185 adapt(out, "_hidl_out", elidedCallback->get()); 186 out << ";\n"; 187 } else { 188 out << "return _hidl_out;\n"; 189 } 190 }).endl(); 191 } 192 193 } // namespace android 194
