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generateCpp.cpp
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generateCpp.cpp
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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 "AST.h"
#include "Coordinator.h"
#include "EnumType.h"
#include "HidlTypeAssertion.h"
#include "Interface.h"
#include "Method.h"
#include "Reference.h"
#include "ScalarType.h"
#include "Scope.h"
#include <algorithm>
#include <hidl-util/Formatter.h>
#include <hidl-util/StringHelper.h>
#include <android-base/logging.h>
#include <string>
#include <vector>
namespace android {
void AST::getPackageComponents(
std::vector<std::string> *components) const {
mPackage.getPackageComponents(components);
}
void AST::getPackageAndVersionComponents(
std::vector<std::string> *components, bool cpp_compatible) const {
mPackage.getPackageAndVersionComponents(components, cpp_compatible);
}
std::string AST::makeHeaderGuard(const std::string &baseName,
bool indicateGenerated) const {
std::string guard;
if (indicateGenerated) {
guard += "HIDL_GENERATED_";
}
guard += StringHelper::Uppercase(mPackage.tokenName());
guard += "_";
guard += StringHelper::Uppercase(baseName);
guard += "_H";
return guard;
}
void AST::generateCppPackageInclude(
Formatter &out,
const FQName &package,
const std::string &klass) {
out << "#include <";
std::vector<std::string> components;
package.getPackageAndVersionComponents(&components, false /* cpp_compatible */);
for (const auto &component : components) {
out << component << "/";
}
out << klass
<< ".h>\n";
}
void AST::enterLeaveNamespace(Formatter &out, bool enter) const {
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, true /* cpp_compatible */);
if (enter) {
for (const auto &component : packageComponents) {
out << "namespace " << component << " {\n";
}
out.setNamespace(mPackage.cppNamespace() + "::");
} else {
out.setNamespace(std::string());
for (auto it = packageComponents.rbegin();
it != packageComponents.rend();
++it) {
out << "} // namespace " << *it << "\n";
}
}
}
static void declareGetService(Formatter &out, const std::string &interfaceName, bool isTry) {
const std::string functionName = isTry ? "tryGetService" : "getService";
out << "static ::android::sp<" << interfaceName << "> " << functionName << "("
<< "const std::string &serviceName=\"default\", bool getStub=false);\n";
out << "static ::android::sp<" << interfaceName << "> " << functionName << "("
<< "const char serviceName[], bool getStub=false)"
<< " { std::string str(serviceName ? serviceName : \"\");"
<< " return " << functionName << "(str, getStub); }\n";
out << "static ::android::sp<" << interfaceName << "> " << functionName << "("
<< "const ::android::hardware::hidl_string& serviceName, bool getStub=false)"
// without c_str the std::string constructor is ambiguous
<< " { std::string str(serviceName.c_str());"
<< " return " << functionName << "(str, getStub); }\n";
out << "static ::android::sp<" << interfaceName << "> " << functionName << "("
<< "bool getStub) { return " << functionName << "(\"default\", getStub); }\n";
}
static void declareServiceManagerInteractions(Formatter &out, const std::string &interfaceName) {
declareGetService(out, interfaceName, true /* isTry */);
declareGetService(out, interfaceName, false /* isTry */);
out << "__attribute__ ((warn_unused_result))"
<< "::android::status_t registerAsService(const std::string &serviceName=\"default\");\n";
out << "static bool registerForNotifications(\n";
out.indent(2, [&] {
out << "const std::string &serviceName,\n"
<< "const ::android::sp<::android::hidl::manager::V1_0::IServiceNotification> "
<< "¬ification);\n";
});
}
static void implementGetService(Formatter &out,
const FQName &fqName,
bool isTry) {
const std::string interfaceName = fqName.getInterfaceName();
const std::string functionName = isTry ? "tryGetService" : "getService";
out << "// static\n"
<< "::android::sp<" << interfaceName << "> " << interfaceName << "::" << functionName << "("
<< "const std::string &serviceName, const bool getStub) ";
out.block([&] {
out << "return ::android::hardware::details::getServiceInternal<"
<< fqName.getInterfaceProxyName()
<< ">(serviceName, "
<< (!isTry ? "true" : "false") // retry
<< ", getStub);\n";
}).endl().endl();
}
static void implementServiceManagerInteractions(Formatter &out,
const FQName &fqName, const std::string &package) {
const std::string interfaceName = fqName.getInterfaceName();
implementGetService(out, fqName, true /* isTry */);
implementGetService(out, fqName, false /* isTry */);
out << "::android::status_t " << interfaceName << "::registerAsService("
<< "const std::string &serviceName) ";
out.block([&] {
out << "::android::hardware::details::onRegistration(\""
<< fqName.getPackageAndVersion().string() << "\", \""
<< interfaceName
<< "\", serviceName);\n\n";
out << "const ::android::sp<::android::hidl::manager::V1_0::IServiceManager> sm\n";
out.indent(2, [&] {
out << "= ::android::hardware::defaultServiceManager();\n";
});
out.sIf("sm == nullptr", [&] {
out << "return ::android::INVALID_OPERATION;\n";
}).endl();
out << "::android::hardware::Return<bool> ret = "
<< "sm->add(serviceName.c_str(), this);\n"
<< "return ret.isOk() && ret ? ::android::OK : ::android::UNKNOWN_ERROR;\n";
}).endl().endl();
out << "bool " << interfaceName << "::registerForNotifications(\n";
out.indent(2, [&] {
out << "const std::string &serviceName,\n"
<< "const ::android::sp<::android::hidl::manager::V1_0::IServiceNotification> "
<< "¬ification) ";
});
out.block([&] {
out << "const ::android::sp<::android::hidl::manager::V1_0::IServiceManager> sm\n";
out.indent(2, [&] {
out << "= ::android::hardware::defaultServiceManager();\n";
});
out.sIf("sm == nullptr", [&] {
out << "return false;\n";
}).endl();
out << "::android::hardware::Return<bool> success =\n";
out.indent(2, [&] {
out << "sm->registerForNotifications(\"" << package << "::" << interfaceName << "\",\n";
out.indent(2, [&] {
out << "serviceName, notification);\n";
});
});
out << "return success.isOk() && success;\n";
}).endl().endl();
}
void AST::generateInterfaceHeader(Formatter& out) const {
const Interface *iface = getInterface();
std::string ifaceName = iface ? iface->localName() : "types";
const std::string guard = makeHeaderGuard(ifaceName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
for (const auto &item : mImportedNames) {
generateCppPackageInclude(out, item, item.name());
}
if (!mImportedNames.empty()) {
out << "\n";
}
if (iface) {
if (isIBase()) {
out << "// skipped #include IServiceNotification.h\n\n";
} else {
out << "#include <android/hidl/manager/1.0/IServiceNotification.h>\n\n";
}
}
out << "#include <hidl/HidlSupport.h>\n";
out << "#include <hidl/MQDescriptor.h>\n";
if (iface) {
out << "#include <hidl/Status.h>\n";
}
out << "#include <utils/NativeHandle.h>\n";
out << "#include <utils/misc.h>\n\n"; /* for report_sysprop_change() */
enterLeaveNamespace(out, true /* enter */);
out << "\n";
if (iface) {
out << "struct "
<< ifaceName;
const Interface *superType = iface->superType();
if (superType == NULL) {
out << " : virtual public ::android::RefBase";
} else {
out << " : public "
<< superType->fullName();
}
out << " {\n";
out.indent();
generateCppTag(out, "android::hardware::details::i_tag");
}
emitTypeDeclarations(out);
if (iface) {
out << "virtual bool isRemote() const ";
if (!isIBase()) {
out << "override ";
}
out << "{ return false; }\n\n";
for (const auto& tuple : iface->allMethodsFromRoot()) {
const Method* method = tuple.method();
out << "\n";
const bool returnsValue = !method->results().empty();
const NamedReference<Type>* elidedReturn = method->canElideCallback();
if (elidedReturn == nullptr && returnsValue) {
out << "using "
<< method->name()
<< "_cb = std::function<void(";
method->emitCppResultSignature(out, true /* specify namespaces */);
out << ")>;\n";
}
method->dumpAnnotations(out);
method->emitDocComment(out);
if (elidedReturn) {
out << "virtual ::android::hardware::Return<";
out << elidedReturn->type().getCppResultType() << "> ";
} else {
out << "virtual ::android::hardware::Return<void> ";
}
out << method->name()
<< "(";
method->emitCppArgSignature(out, true /* specify namespaces */);
out << ")";
if (method->isHidlReserved()) {
if (!isIBase()) {
out << " override";
}
} else {
out << " = 0";
}
out << ";\n";
}
out << "// cast static functions\n";
std::string childTypeResult = iface->getCppResultType();
for (const Interface *superType : iface->typeChain()) {
out << "static ::android::hardware::Return<"
<< childTypeResult
<< "> castFrom("
<< superType->getCppArgumentType()
<< " parent"
<< ", bool emitError = false);\n";
}
out << "\nstatic const char* descriptor;\n\n";
if (isIBase()) {
out << "// skipped getService, registerAsService, registerForNotifications\n\n";
} else {
declareServiceManagerInteractions(out, iface->localName());
}
}
if (iface) {
out.unindent();
out << "};\n\n";
}
mRootScope.emitPackageTypeDeclarations(out);
out << "\n";
enterLeaveNamespace(out, false /* enter */);
mRootScope.emitGlobalTypeDeclarations(out);
out << "\n#endif // " << guard << "\n";
}
void AST::generateHwBinderHeader(Formatter& out) const {
const Interface *iface = getInterface();
std::string klassName = iface ? iface->getHwName() : "hwtypes";
const std::string guard = makeHeaderGuard(klassName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
generateCppPackageInclude(out, mPackage, iface ? iface->localName() : "types");
out << "\n";
for (const auto &item : mImportedNames) {
if (item.name() == "types") {
generateCppPackageInclude(out, item, "hwtypes");
} else {
generateCppPackageInclude(out, item, item.getInterfaceStubName());
generateCppPackageInclude(out, item, item.getInterfaceProxyName());
}
}
out << "\n";
out << "#include <hidl/Status.h>\n";
out << "#include <hwbinder/IBinder.h>\n";
out << "#include <hwbinder/Parcel.h>\n";
out << "\n";
enterLeaveNamespace(out, true /* enter */);
mRootScope.emitPackageHwDeclarations(out);
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
}
void AST::emitTypeDeclarations(Formatter& out) const {
return mRootScope.emitTypeDeclarations(out);
}
static void wrapPassthroughArg(Formatter& out, const NamedReference<Type>* arg,
bool addPrefixToName, std::function<void(void)> handleError) {
if (!arg->type().isInterface()) {
return;
}
std::string name = (addPrefixToName ? "_hidl_out_" : "") + arg->name();
std::string wrappedName = (addPrefixToName ? "_hidl_out_wrapped_" : "_hidl_wrapped_")
+ arg->name();
const Interface &iface = static_cast<const Interface &>(arg->type());
out << iface.getCppStackType() << " " << wrappedName << ";\n";
// TODO(elsk): b/33754152 Should not wrap this if object is Bs*
out.sIf(name + " != nullptr && !" + name + "->isRemote()", [&] {
out << wrappedName
<< " = "
<< "::android::hardware::details::wrapPassthrough("
<< name
<< ");\n";
out.sIf(wrappedName + " == nullptr", [&] {
// Fatal error. Happens when the BsFoo class is not found in the binary
// or any dynamic libraries.
handleError();
}).endl();
}).sElse([&] {
out << wrappedName << " = " << name << ";\n";
}).endl().endl();
}
void AST::generatePassthroughMethod(Formatter& out, const Method* method) const {
method->generateCppSignature(out);
out << " {\n";
out.indent();
if (method->isHidlReserved()
&& method->overridesCppImpl(IMPL_PASSTHROUGH)) {
method->cppImpl(IMPL_PASSTHROUGH, out);
out.unindent();
out << "}\n\n";
return;
}
const bool returnsValue = !method->results().empty();
const NamedReference<Type>* elidedReturn = method->canElideCallback();
if (returnsValue && elidedReturn == nullptr) {
generateCheckNonNull(out, "_hidl_cb");
}
generateCppInstrumentationCall(
out,
InstrumentationEvent::PASSTHROUGH_ENTRY,
method);
for (const auto &arg : method->args()) {
wrapPassthroughArg(out, arg, false /* addPrefixToName */, [&] {
out << "return ::android::hardware::Status::fromExceptionCode(\n";
out.indent(2, [&] {
out << "::android::hardware::Status::EX_TRANSACTION_FAILED,\n"
<< "\"Cannot wrap passthrough interface.\");\n";
});
});
}
out << "auto _hidl_error = ::android::hardware::Void();\n";
out << "auto _hidl_return = ";
if (method->isOneway()) {
out << "addOnewayTask([mImpl = this->mImpl\n"
<< "#ifdef __ANDROID_DEBUGGABLE__\n"
", mEnableInstrumentation = this->mEnableInstrumentation, "
"mInstrumentationCallbacks = this->mInstrumentationCallbacks\n"
<< "#endif // __ANDROID_DEBUGGABLE__\n";
for (const auto &arg : method->args()) {
out << ", "
<< (arg->type().isInterface() ? "_hidl_wrapped_" : "")
<< arg->name();
}
out << "] {\n";
out.indent();
}
out << "mImpl->"
<< method->name()
<< "(";
out.join(method->args().begin(), method->args().end(), ", ", [&](const auto &arg) {
out << (arg->type().isInterface() ? "_hidl_wrapped_" : "") << arg->name();
});
if (returnsValue && elidedReturn == nullptr) {
// never true if oneway since oneway methods don't return values
if (!method->args().empty()) {
out << ", ";
}
out << "[&](";
out.join(method->results().begin(), method->results().end(), ", ", [&](const auto &arg) {
out << "const auto &_hidl_out_"
<< arg->name();
});
out << ") {\n";
out.indent();
generateCppInstrumentationCall(
out,
InstrumentationEvent::PASSTHROUGH_EXIT,
method);
for (const auto &arg : method->results()) {
wrapPassthroughArg(out, arg, true /* addPrefixToName */, [&] {
out << "_hidl_error = ::android::hardware::Status::fromExceptionCode(\n";
out.indent(2, [&] {
out << "::android::hardware::Status::EX_TRANSACTION_FAILED,\n"
<< "\"Cannot wrap passthrough interface.\");\n";
});
out << "return;\n";
});
}
out << "_hidl_cb(";
out.join(method->results().begin(), method->results().end(), ", ", [&](const auto &arg) {
out << (arg->type().isInterface() ? "_hidl_out_wrapped_" : "_hidl_out_")
<< arg->name();
});
out << ");\n";
out.unindent();
out << "});\n\n";
} else {
out << ");\n\n";
// used by generateCppInstrumentationCall
if (elidedReturn != nullptr) {
out << "#ifdef __ANDROID_DEBUGGABLE__\n"
<< elidedReturn->type().getCppResultType() << " _hidl_out_" << elidedReturn->name()
<< " = _hidl_return;\n"
<< "#endif // __ANDROID_DEBUGGABLE__\n";
}
generateCppInstrumentationCall(
out,
InstrumentationEvent::PASSTHROUGH_EXIT,
method);
}
if (method->isOneway()) {
out.unindent();
out << "});\n";
}
out << "return _hidl_return;\n";
out.unindent();
out << "}\n";
}
void AST::generateMethods(Formatter& out, const MethodGenerator& gen, bool includeParent) const {
const Interface* iface = mRootScope.getInterface();
const Interface *prevIterface = nullptr;
for (const auto &tuple : iface->allMethodsFromRoot()) {
const Method *method = tuple.method();
const Interface *superInterface = tuple.interface();
if (!includeParent && superInterface != iface) {
continue;
}
if(prevIterface != superInterface) {
if (prevIterface != nullptr) {
out << "\n";
}
out << "// Methods from "
<< superInterface->fullName()
<< " follow.\n";
prevIterface = superInterface;
}
gen(method, superInterface);
}
out << "\n";
}
void AST::generateTemplatizationLink(Formatter& out) const {
out << "typedef " << mRootScope.getInterface()->localName() << " Pure;\n\n";
}
void AST::generateCppTag(Formatter& out, const std::string& tag) const {
out << "typedef " << tag << " _hidl_tag;\n\n";
}
void AST::generateStubHeader(Formatter& out) const {
CHECK(AST::isInterface());
const Interface* iface = mRootScope.getInterface();
const std::string klassName = iface->getStubName();
const std::string guard = makeHeaderGuard(klassName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
generateCppPackageInclude(out, mPackage, iface->getHwName());
out << "\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
out << "struct "
<< klassName;
if (iface->isIBase()) {
out << " : public ::android::hardware::BHwBinder";
out << ", public ::android::hardware::details::HidlInstrumentor {\n";
} else {
out << " : public "
<< gIBaseFqName.getInterfaceStubFqName().cppName()
<< " {\n";
}
out.indent();
out << "explicit "
<< klassName
<< "(const ::android::sp<" << iface->localName() << "> &_hidl_impl);"
<< "\n";
out << "explicit "
<< klassName
<< "(const ::android::sp<" << iface->localName() << "> &_hidl_impl,"
<< " const std::string& HidlInstrumentor_package,"
<< " const std::string& HidlInstrumentor_interface);"
<< "\n\n";
out << "virtual ~" << klassName << "();\n\n";
out << "::android::status_t onTransact(\n";
out.indent();
out.indent();
out << "uint32_t _hidl_code,\n";
out << "const ::android::hardware::Parcel &_hidl_data,\n";
out << "::android::hardware::Parcel *_hidl_reply,\n";
out << "uint32_t _hidl_flags = 0,\n";
out << "TransactCallback _hidl_cb = nullptr) override;\n\n";
out.unindent();
out.unindent();
out.endl();
generateTemplatizationLink(out);
generateCppTag(out, "android::hardware::details::bnhw_tag");
out << "::android::sp<" << iface->localName() << "> getImpl() { return _hidl_mImpl; }\n";
generateMethods(out,
[&](const Method* method, const Interface*) {
if (method->isHidlReserved() && method->overridesCppImpl(IMPL_PROXY)) {
return;
}
out << "static ::android::status_t _hidl_" << method->name() << "(\n";
out.indent(2,
[&] {
out << "::android::hidl::base::V1_0::BnHwBase* _hidl_this,\n"
<< "const ::android::hardware::Parcel &_hidl_data,\n"
<< "::android::hardware::Parcel *_hidl_reply,\n"
<< "TransactCallback _hidl_cb);\n";
})
.endl()
.endl();
},
false /* include parents */);
out.unindent();
out << "private:\n";
out.indent();
generateMethods(out, [&](const Method* method, const Interface* iface) {
if (!method->isHidlReserved() || !method->overridesCppImpl(IMPL_STUB_IMPL)) {
return;
}
const bool returnsValue = !method->results().empty();
const NamedReference<Type>* elidedReturn = method->canElideCallback();
if (elidedReturn == nullptr && returnsValue) {
out << "using " << method->name() << "_cb = "
<< iface->fqName().cppName()
<< "::" << method->name() << "_cb;\n";
}
method->generateCppSignature(out);
out << ";\n";
});
out << "::android::sp<" << iface->localName() << "> _hidl_mImpl;\n";
out.unindent();
out << "};\n\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
}
void AST::generateProxyHeader(Formatter& out) const {
if (!AST::isInterface()) {
// types.hal does not get a proxy header.
return;
}
const Interface* iface = mRootScope.getInterface();
const std::string proxyName = iface->getProxyName();
const std::string guard = makeHeaderGuard(proxyName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
out << "#include <hidl/HidlTransportSupport.h>\n\n";
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, false /* cpp_compatible */);
generateCppPackageInclude(out, mPackage, iface->getHwName());
out << "\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
out << "struct "
<< proxyName
<< " : public ::android::hardware::BpInterface<"
<< iface->localName()
<< ">, public ::android::hardware::details::HidlInstrumentor {\n";
out.indent();
out << "explicit "
<< proxyName
<< "(const ::android::sp<::android::hardware::IBinder> &_hidl_impl);"
<< "\n\n";
generateTemplatizationLink(out);
generateCppTag(out, "android::hardware::details::bphw_tag");
out << "virtual bool isRemote() const override { return true; }\n\n";
generateMethods(
out,
[&](const Method* method, const Interface*) {
if (method->isHidlReserved() && method->overridesCppImpl(IMPL_PROXY)) {
return;
}
out << "static ";
method->generateCppReturnType(out);
out << " _hidl_" << method->name() << "("
<< "::android::hardware::IInterface* _hidl_this, "
<< "::android::hardware::details::HidlInstrumentor *_hidl_this_instrumentor";
if (!method->hasEmptyCppArgSignature()) {
out << ", ";
}
method->emitCppArgSignature(out);
out << ");\n";
},
false /* include parents */);
generateMethods(out, [&](const Method* method, const Interface*) {
method->generateCppSignature(out);
out << " override;\n";
});
out.unindent();
out << "private:\n";
out.indent();
out << "std::mutex _hidl_mMutex;\n"
<< "std::vector<::android::sp<::android::hardware::hidl_binder_death_recipient>>"
<< " _hidl_mDeathRecipients;\n";
out.unindent();
out << "};\n\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
}
void AST::generateCppSource(Formatter& out) const {
std::string baseName = getBaseName();
const Interface *iface = getInterface();
const std::string klassName = baseName + (baseName == "types" ? "" : "All");
out << "#define LOG_TAG \""
<< mPackage.string() << "::" << baseName
<< "\"\n\n";
out << "#include <android/log.h>\n";
out << "#include <cutils/trace.h>\n";
out << "#include <hidl/HidlTransportSupport.h>\n\n";
if (iface) {
// This is a no-op for IServiceManager itself.
out << "#include <android/hidl/manager/1.0/IServiceManager.h>\n";
generateCppPackageInclude(out, mPackage, iface->getProxyName());
generateCppPackageInclude(out, mPackage, iface->getStubName());
generateCppPackageInclude(out, mPackage, iface->getPassthroughName());
for (const Interface *superType : iface->superTypeChain()) {
generateCppPackageInclude(out,
superType->fqName(),
superType->fqName().getInterfaceProxyName());
}
out << "#include <hidl/ServiceManagement.h>\n";
} else {
generateCppPackageInclude(out, mPackage, "types");
generateCppPackageInclude(out, mPackage, "hwtypes");
}
out << "\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
generateTypeSource(out, iface ? iface->localName() : "");
if (iface) {
const Interface* iface = mRootScope.getInterface();
// need to be put here, generateStubSource is using this.
out << "const char* "
<< iface->localName()
<< "::descriptor(\""
<< iface->fqName().string()
<< "\");\n\n";
out << "__attribute__((constructor)) ";
out << "static void static_constructor() {\n";
out.indent([&] {
out << "::android::hardware::details::getBnConstructorMap().set("
<< iface->localName()
<< "::descriptor,\n";
out.indent(2, [&] {
out << "[](void *iIntf) -> ::android::sp<::android::hardware::IBinder> {\n";
out.indent([&] {
out << "return new "
<< iface->getStubName()
<< "(static_cast<"
<< iface->localName()
<< " *>(iIntf));\n";
});
out << "});\n";
});
out << "::android::hardware::details::getBsConstructorMap().set("
<< iface->localName()
<< "::descriptor,\n";
out.indent(2, [&] {
out << "[](void *iIntf) -> ::android::sp<"
<< gIBaseFqName.cppName()
<< "> {\n";
out.indent([&] {
out << "return new "
<< iface->getPassthroughName()
<< "(static_cast<"
<< iface->localName()
<< " *>(iIntf));\n";
});
out << "});\n";
});
});
out << "};\n\n";
out << "__attribute__((destructor))";
out << "static void static_destructor() {\n";
out.indent([&] {
out << "::android::hardware::details::getBnConstructorMap().erase("
<< iface->localName()
<< "::descriptor);\n";
out << "::android::hardware::details::getBsConstructorMap().erase("
<< iface->localName()
<< "::descriptor);\n";
});
out << "};\n\n";
generateInterfaceSource(out);
generateProxySource(out, iface->fqName());
generateStubSource(out, iface);
generatePassthroughSource(out);
if (isIBase()) {
out << "// skipped getService, registerAsService, registerForNotifications\n";
} else {
std::string package = iface->fqName().package()
+ iface->fqName().atVersion();
implementServiceManagerInteractions(out, iface->fqName(), package);
}
}
HidlTypeAssertion::EmitAll(out);
out << "\n";
enterLeaveNamespace(out, false /* enter */);
}
void AST::generateCheckNonNull(Formatter &out, const std::string &nonNull) {
out.sIf(nonNull + " == nullptr", [&] {
out << "return ::android::hardware::Status::fromExceptionCode(\n";
out.indent(2, [&] {
out << "::android::hardware::Status::EX_ILLEGAL_ARGUMENT,\n"
<< "\"Null synchronous callback passed.\");\n";
});
}).endl().endl();
}
void AST::generateTypeSource(Formatter& out, const std::string& ifaceName) const {
mRootScope.emitTypeDefinitions(out, ifaceName);
}
void AST::declareCppReaderLocals(Formatter& out, const std::vector<NamedReference<Type>*>& args,
bool forResults) const {
if (args.empty()) {
return;
}
for (const auto &arg : args) {
const Type &type = arg->type();
out << type.getCppResultType()
<< " "
<< (forResults ? "_hidl_out_" : "") + arg->name()
<< ";\n";
}
out << "\n";
}
void AST::emitCppReaderWriter(Formatter& out, const std::string& parcelObj, bool parcelObjIsPointer,
const NamedReference<Type>* arg, bool isReader, Type::ErrorMode mode,
bool addPrefixToName) const {
const Type &type = arg->type();
type.emitReaderWriter(
out,
addPrefixToName ? ("_hidl_out_" + arg->name()) : arg->name(),
parcelObj,
parcelObjIsPointer,
isReader,
mode);
}
void AST::emitCppResolveReferences(Formatter& out, const std::string& parcelObj,
bool parcelObjIsPointer, const NamedReference<Type>* arg,
bool isReader, Type::ErrorMode mode,
bool addPrefixToName) const {
const Type &type = arg->type();
if(type.needsResolveReferences()) {
type.emitResolveReferences(
out,
addPrefixToName ? ("_hidl_out_" + arg->name()) : arg->name(),
isReader, // nameIsPointer
parcelObj,
parcelObjIsPointer,
isReader,
mode);
}
}
void AST::generateProxyMethodSource(Formatter& out, const std::string& klassName,
const Method* method, const Interface* superInterface) const {
method->generateCppSignature(out,
klassName,
true /* specify namespaces */);
if (method->isHidlReserved() && method->overridesCppImpl(IMPL_PROXY)) {
out.block([&] {
method->cppImpl(IMPL_PROXY, out);
}).endl().endl();
return;
}
out.block([&] {
const bool returnsValue = !method->results().empty();
const NamedReference<Type>* elidedReturn = method->canElideCallback();
method->generateCppReturnType(out);
out << " _hidl_out = "
<< superInterface->fqName().cppNamespace()
<< "::"
<< superInterface->getProxyName()
<< "::_hidl_"
<< method->name()
<< "(this, this";
if (!method->hasEmptyCppArgSignature()) {
out << ", ";
}
out.join(method->args().begin(), method->args().end(), ", ", [&](const auto &arg) {
out << arg->name();
});
if (returnsValue && elidedReturn == nullptr) {
if (!method->args().empty()) {
out << ", ";
}
out << "_hidl_cb";
}
out << ");\n\n";
out << "return _hidl_out;\n";
}).endl().endl();
}
void AST::generateStaticProxyMethodSource(Formatter& out, const std::string& klassName,