blob: 57ed3493db8c7f21a165a478d1a996cf0f4348c5 [file] [log] [blame]
/*
* 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 "Formatter.h"
#include "Interface.h"
#include "Method.h"
#include "ScalarType.h"
#include "Scope.h"
#include <algorithm>
#include <android-base/logging.h>
#include <string>
#include <vector>
namespace android {
static std::string upcase(const std::string in) {
std::string out{in};
for (auto &ch : out) {
ch = toupper(ch);
}
return out;
}
status_t AST::generateCpp(const std::string &outputPath) const {
status_t err = generateInterfaceHeader(outputPath);
if (err == OK) {
err = generateStubHeader(outputPath);
}
if (err == OK) {
err = generateHwBinderHeader(outputPath);
}
if (err == OK) {
err = generateProxyHeader(outputPath);
}
if (err == OK) {
err = generateAllSource(outputPath);
}
return err;
}
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) const {
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, true /* cpp_compatible */);
std::string guard = "HIDL_GENERATED";
for (const auto &component : packageComponents) {
guard += "_";
guard += component;
}
guard += "_";
guard += baseName;
guard += "_H_";
return guard;
}
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";
}
}
}
status_t AST::generateInterfaceHeader(const std::string &outputPath) const {
std::string path = outputPath;
path.append(mCoordinator->convertPackageRootToPath(mPackage));
path.append(mCoordinator->getPackagePath(mPackage, true /* relative */));
std::string ifaceName;
bool isInterface = true;
if (!AST::isInterface(&ifaceName)) {
ifaceName = "types";
isInterface = false;
}
path.append(ifaceName);
path.append(".h");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
const std::string guard = makeHeaderGuard(ifaceName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
for (const auto &item : mImportedNames) {
out << "#include <";
std::vector<std::string> components;
item.getPackageAndVersionComponents(
&components, false /* cpp_compatible */);
for (const auto &component : components) {
out << component << "/";
}
out << item.name()
<< ".h>\n";
}
if (!mImportedNames.empty()) {
out << "\n";
}
out << "#include <hidl/HidlSupport.h>\n";
out << "#include <hidl/IServiceManager.h>\n";
if (isInterface) {
out << "#include <hwbinder/Status.h>\n";
}
out << "#include <utils/NativeHandle.h>\n\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
// cut off the leading 'I'.
const std::string baseName = ifaceName.substr(1);
if (isInterface) {
out << "struct "
<< ifaceName;
const Interface *iface = mRootScope->getInterface();
const Interface *superType = iface->superType();
if (superType == NULL) {
out << " : virtual public RefBase";
} else {
out << " : public "
<< superType->fullName();
}
out << " {\n";
out.indent();
}
status_t err = emitTypeDeclarations(out);
if (err != OK) {
return err;
}
if (isInterface) {
const Interface *iface = mRootScope->getInterface();
const Interface *superType = iface->superType();
out << "virtual bool isRemote() const { return false; } \n\n";
bool haveCallbacks = false;
for (const auto &method : iface->methods()) {
const bool returnsValue = !method->results().empty();
if (!returnsValue) {
continue;
}
if (method->canElideCallback() != nullptr) {
continue;
}
haveCallbacks = true;
out << "using "
<< method->name()
<< "_cb = std::function<void("
<< Method::GetSignature(method->results())
<< ")>;\n";
}
if (haveCallbacks) {
out << "\n";
}
for (const auto &method : iface->methods()) {
const bool returnsValue = !method->results().empty();
method->dumpAnnotations(out);
const TypedVar *elidedReturn = method->canElideCallback();
if (elidedReturn) {
std::string extra;
out << "virtual ::android::hardware::Return<";
out << elidedReturn->type().getCppResultType(&extra) << "> ";
} else {
out << "virtual ::android::hardware::Status ";
}
out << method->name()
<< "("
<< Method::GetSignature(method->args());
if (returnsValue && elidedReturn == nullptr) {
if (!method->args().empty()) {
out << ", ";
}
out << method->name() << "_cb _hidl_cb = nullptr";
}
out << ") = 0;\n";
}
out << "DECLARE_REGISTER_AND_GET_SERVICE(" << baseName << ")\n";
}
if (isInterface) {
out.unindent();
out << "};\n";
}
out << "\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
return OK;
}
status_t AST::generateHwBinderHeader(const std::string &outputPath) const {
std::string ifaceName;
if(!AST::isInterface(&ifaceName)) {
// types.hal does not get an HwBinder header.
return OK;
}
// cut off the leading 'I'.
const std::string baseName = ifaceName.substr(1);
const std::string klassName = "IHw" + baseName;
std::string path = outputPath;
path.append(mCoordinator->convertPackageRootToPath(mPackage));
path.append(mCoordinator->getPackagePath(mPackage, true /* relative */));
path.append(klassName + ".h");
FILE* file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
const std::string guard = makeHeaderGuard(klassName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, false /* cpp_compatible */);
out << "#include <";
for (const auto &component : packageComponents) {
out << component << "/";
}
out << ifaceName << ".h>\n\n";
for (const auto &item : mImportedNames) {
if (item.name() == "types") {
continue;
}
out << "#include <";
std::vector<std::string> components;
item.getPackageAndVersionComponents(
&components, false /* cpp_compatible */);
for (const auto &component : components) {
out << component << "/";
}
// cut off the leading I
const std::string itemBaseName = item.name().substr(1);
out << "Bn"
<< itemBaseName
<< ".h>\n";
}
out << "\n";
out << "#include <hidl/HidlSupport.h>\n";
out << "#include <hwbinder/IBinder.h>\n";
out << "#include <hwbinder/IInterface.h>\n";
out << "#include <hwbinder/Status.h>\n";
out << "\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
out << "struct "
<< klassName
<< " : public "
<< ifaceName;
const Interface *iface = mRootScope->getInterface();
const Interface *superType = iface->superType();
out << ", public ::android::hardware::IInterface";
out << " {\n";
out.indent();
out << "DECLARE_HWBINDER_META_INTERFACE(" << baseName << ");\n\n";
out << "enum Call {\n";
out.indent();
bool first = true;
for (const auto &method : iface->methods()) {
out << upcase(method->name());
if (first) {
out << " = ";
if (superType != NULL) {
out << superType->fqName().cppNamespace()
<< "::IHw"
<< superType->getBaseName()
<< "::Call::CallCount";
} else {
out << "::android::hardware::IBinder::FIRST_CALL_TRANSACTION";
}
first = false;
}
out << ",\n";
}
out << "CallCount\n";
out.unindent();
out << "};\n\n";
out.unindent();
out << "};\n\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
return OK;
}
status_t AST::emitTypeDeclarations(Formatter &out) const {
return mRootScope->emitTypeDeclarations(out);
}
status_t AST::generateHeaderMethodSignatures(
Formatter &out, bool stub) const {
const Interface *iface = mRootScope->getInterface();
std::vector<const Interface *> chain;
while (iface != NULL) {
chain.push_back(iface);
iface = iface->superType();
}
for (auto it = chain.rbegin(); it != chain.rend(); ++it) {
const Interface *superInterface = *it;
out << "// Methods from "
<< superInterface->fullName()
<< " follow.\n";
for (const auto &method : superInterface->methods()) {
if (stub) {
out << "inline ";
}
const bool returnsValue = !method->results().empty();
const TypedVar *elidedReturn = method->canElideCallback();
if (elidedReturn == nullptr) {
out << "::android::hardware::Status ";
} else {
std::string extra;
out << "::android::hardware::Return<";
out << elidedReturn->type().getCppResultType(&extra) << "> ";
}
out << method->name()
<< "("
<< Method::GetSignature(method->args());
if (returnsValue && elidedReturn == nullptr) {
if (!method->args().empty()) {
out << ", ";
}
out << method->name() << "_cb _hidl_cb";
}
out << ") ";
if (stub) {
out << " {\n";
out.indent();
out << "return mImpl->"
<< method->name()
<< "(";
bool first = true;
for (const auto &arg : method->args()) {
if (!first) {
out << ", ";
}
first = false;
out << arg->name();
}
if (returnsValue && elidedReturn == nullptr) {
if (!method->args().empty()) {
out << ", ";
}
out << "_hidl_cb";
}
out << ");\n";
out.unindent();
out << "}";
} else {
out << "override";
}
out << ";\n";
}
out << "\n";
}
return OK;
}
status_t AST::generateStubHeader(const std::string &outputPath) const {
std::string ifaceName;
if (!AST::isInterface(&ifaceName)) {
// types.hal does not get a stub header.
return OK;
}
// cut off the leading 'I'.
const std::string baseName = ifaceName.substr(1);
const std::string klassName = "Bn" + baseName;
std::string path = outputPath;
path.append(mCoordinator->convertPackageRootToPath(mPackage));
path.append(mCoordinator->getPackagePath(mPackage, true /* relative */));
path.append(klassName);
path.append(".h");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
const std::string guard = makeHeaderGuard(klassName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, false /* cpp_compatible */);
out << "#include <";
for (const auto &component : packageComponents) {
out << component << "/";
}
out << "IHw" << baseName << ".h>\n\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
out << "struct "
<< "Bn"
<< baseName
<< " : public ::android::hardware::BnInterface<I"
<< baseName << ", IHw" << baseName
<< "> {\n";
out.indent();
out << "explicit Bn"
<< baseName
<< "(const ::android::sp<" << ifaceName << "> &_hidl_impl);"
<< "\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();
generateHeaderMethodSignatures(out, true); // stub
out.unindent();
out << "};\n\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
return OK;
}
status_t AST::generateProxyHeader(const std::string &outputPath) const {
std::string ifaceName;
if (!AST::isInterface(&ifaceName)) {
// types.hal does not get a proxy header.
return OK;
}
// cut off the leading 'I'.
const std::string baseName = ifaceName.substr(1);
std::string path = outputPath;
path.append(mCoordinator->convertPackageRootToPath(mPackage));
path.append(mCoordinator->getPackagePath(mPackage, true /* relative */));
path.append("Bp");
path.append(baseName);
path.append(".h");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
const std::string guard = makeHeaderGuard("Bp" + baseName);
out << "#ifndef " << guard << "\n";
out << "#define " << guard << "\n\n";
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, false /* cpp_compatible */);
out << "#include <";
for (const auto &component : packageComponents) {
out << component << "/";
}
out << "IHw" << baseName << ".h>\n\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
out << "struct "
<< "Bp"
<< baseName
<< " : public ::android::hardware::BpInterface<IHw"
<< baseName
<< "> {\n";
out.indent();
out << "explicit Bp"
<< baseName
<< "(const ::android::sp<::android::hardware::IBinder> &_hidl_impl);"
<< "\n\n";
out << "virtual bool isRemote() const { return true; } \n\n";
generateHeaderMethodSignatures(out, false); // proxy
out.unindent();
out << "};\n\n";
enterLeaveNamespace(out, false /* enter */);
out << "\n#endif // " << guard << "\n";
return OK;
}
status_t AST::generateAllSource(const std::string &outputPath) const {
std::string path = outputPath;
path.append(mCoordinator->convertPackageRootToPath(mPackage));
path.append(mCoordinator->getPackagePath(mPackage, true /* relative */));
std::string ifaceName;
std::string baseName;
bool isInterface = true;
if (!AST::isInterface(&ifaceName)) {
baseName = "types";
isInterface = false;
} else {
baseName = ifaceName.substr(1); // cut off the leading 'I'.
}
path.append(baseName);
if (baseName != "types") {
path.append("All");
}
path.append(".cpp");
CHECK(Coordinator::MakeParentHierarchy(path));
FILE *file = fopen(path.c_str(), "w");
if (file == NULL) {
return -errno;
}
Formatter out(file);
std::vector<std::string> packageComponents;
getPackageAndVersionComponents(
&packageComponents, false /* cpp_compatible */);
std::string prefix;
for (const auto &component : packageComponents) {
prefix += component;
prefix += "/";
}
if (isInterface) {
out << "#include <" << prefix << "/Bp" << baseName << ".h>\n";
out << "#include <" << prefix << "/Bn" << baseName << ".h>\n";
} else {
out << "#include <" << prefix << "types.h>\n";
}
out << "\n";
enterLeaveNamespace(out, true /* enter */);
out << "\n";
status_t err = generateTypeSource(out, ifaceName);
if (err == OK && isInterface) {
err = generateProxySource(out, baseName);
}
if (err == OK && isInterface) {
err = generateStubSource(out, baseName);
}
if (err == OK && isInterface) {
out << "IMPLEMENT_REGISTER_AND_GET_SERVICE(" << baseName << ")\n";
}
enterLeaveNamespace(out, false /* enter */);
return err;
}
status_t AST::generateTypeSource(
Formatter &out, const std::string &ifaceName) const {
return mRootScope->emitTypeDefinitions(out, ifaceName);
}
void AST::declareCppReaderLocals(
Formatter &out, const std::vector<TypedVar *> &args) const {
if (args.empty()) {
return;
}
for (const auto &arg : args) {
const Type &type = arg->type();
std::string extra;
out << type.getCppResultType(&extra)
<< " "
<< arg->name()
<< extra
<< ";\n";
}
out << "\n";
}
void AST::emitCppReaderWriter(
Formatter &out,
const std::string &parcelObj,
bool parcelObjIsPointer,
const TypedVar *arg,
bool isReader,
Type::ErrorMode mode) const {
const Type &type = arg->type();
type.emitReaderWriter(
out,
arg->name(),
parcelObj,
parcelObjIsPointer,
isReader,
mode);
}
status_t AST::generateProxySource(
Formatter &out, const std::string &baseName) const {
const std::string klassName = "Bp" + baseName;
out << klassName
<< "::"
<< klassName
<< "(const ::android::sp<::android::hardware::IBinder> &_hidl_impl)\n";
out.indent();
out.indent();
out << ": BpInterface"
<< "<IHw"
<< baseName
<< ">(_hidl_impl) {\n";
out.unindent();
out.unindent();
out << "}\n\n";
const Interface *iface = mRootScope->getInterface();
std::vector<const Interface *> chain;
while (iface != NULL) {
chain.push_back(iface);
iface = iface->superType();
}
for (auto it = chain.rbegin(); it != chain.rend(); ++it) {
const Interface *superInterface = *it;
for (const auto &method : superInterface->methods()) {
const bool returnsValue = !method->results().empty();
const TypedVar *elidedReturn = method->canElideCallback();
if (elidedReturn) {
std::string extra;
out << "::android::hardware::Return<";
out << elidedReturn->type().getCppResultType(&extra) << "> ";
} else {
out << "::android::hardware::Status ";
}
out << klassName
<< "::"
<< method->name()
<< "("
<< Method::GetSignature(method->args());
if (returnsValue && elidedReturn == nullptr) {
if (!method->args().empty()) {
out << ", ";
}
out << method->name() << "_cb _hidl_cb";
}
out << ") {\n";
out.indent();
out << "::android::hardware::Parcel _hidl_data;\n";
out << "::android::hardware::Parcel _hidl_reply;\n";
out << "::android::status_t _hidl_err;\n";
out << "::android::hardware::Status _hidl_status;\n\n";
declareCppReaderLocals(out, method->results());
out << "_hidl_err = _hidl_data.writeInterfaceToken("
<< superInterface->fqName().cppNamespace()
<< "::IHw"
<< superInterface->getBaseName()
<< "::descriptor);\n";
out << "if (_hidl_err != ::android::OK) { goto _hidl_error; }\n\n";
for (const auto &arg : method->args()) {
emitCppReaderWriter(
out,
"_hidl_data",
false /* parcelObjIsPointer */,
arg,
false /* reader */,
Type::ErrorMode_Goto);
}
out << "_hidl_err = remote()->transact("
<< superInterface->fqName().cppNamespace()
<< "::IHw"
<< superInterface->getBaseName()
<< "::Call::"
<< upcase(method->name())
<< ", _hidl_data, &_hidl_reply";
if (method->isOneway()) {
out << ", ::android::hardware::IBinder::FLAG_ONEWAY";
}
out << ");\n";
out << "if (_hidl_err != ::android::OK) { goto _hidl_error; }\n\n";
if (!method->isOneway()) {
out << "_hidl_err = _hidl_status.readFromParcel(_hidl_reply);\n";
out << "if (_hidl_err != ::android::OK) { goto _hidl_error; }\n\n";
out << "if (!_hidl_status.isOk()) { return _hidl_status; }\n\n";
for (const auto &arg : method->results()) {
emitCppReaderWriter(
out,
"_hidl_reply",
false /* parcelObjIsPointer */,
arg,
true /* reader */,
Type::ErrorMode_Goto);
}
if (returnsValue && elidedReturn == nullptr) {
out << "if (_hidl_cb != nullptr) {\n";
out.indent();
out << "_hidl_cb(";
bool first = true;
for (const auto &arg : method->results()) {
if (!first) {
out << ", ";
}
if (arg->type().resultNeedsDeref()) {
out << "*";
}
out << arg->name();
first = false;
}
out << ");\n";
out.unindent();
out << "}\n\n";
}
}
if (elidedReturn != nullptr) {
std::string extra;
out << "_hidl_status.setFromStatusT(_hidl_err);\n";
out << "return ::android::hardware::Return<";
out << elidedReturn->type().getCppResultType(&extra)
<< ">(" << elidedReturn->name() << ");\n\n";
out.unindent();
out << "_hidl_error:\n";
out.indent();
out << "_hidl_status.setFromStatusT(_hidl_err);\n";
out << "return ::android::hardware::Return<";
out << method->results().at(0)->type().getCppResultType(&extra)
<< ">(_hidl_status);\n";
} else {
out.unindent();
out << "_hidl_error:\n";
out.indent();
out << "_hidl_status.setFromStatusT(_hidl_err);\n";
out << "return _hidl_status;\n";
}
out.unindent();
out << "}\n\n";
}
}
return OK;
}
status_t AST::generateStubSource(
Formatter &out, const std::string &baseName) const {
out << "IMPLEMENT_HWBINDER_META_INTERFACE("
<< baseName
<< ", \""
<< mPackage.string()
<< "::I"
<< baseName
<< "\");\n\n";
const std::string klassName = "Bn" + baseName;
out << klassName
<< "::"
<< klassName
<< "(const ::android::sp<I" << baseName <<"> &_hidl_impl)\n";
out.indent();
out.indent();
out << ": BnInterface"
<< "<I"
<< baseName
<< ", IHw"
<< baseName
<< ">(_hidl_impl) {\n";
out.unindent();
out.unindent();
out << "}\n\n";
out << "::android::status_t " << klassName << "::onTransact(\n";
out.indent();
out.indent();
out << "uint32_t _hidl_code,\n"
<< "const ::android::hardware::Parcel &_hidl_data,\n"
<< "::android::hardware::Parcel *_hidl_reply,\n"
<< "uint32_t _hidl_flags,\n"
<< "TransactCallback _hidl_cb) {\n";
out.unindent();
out << "::android::status_t _hidl_err = ::android::OK;\n\n";
out << "switch (_hidl_code) {\n";
out.indent();
const Interface *iface = mRootScope->getInterface();
std::vector<const Interface *> chain;
while (iface != NULL) {
chain.push_back(iface);
iface = iface->superType();
}
for (auto it = chain.rbegin(); it != chain.rend(); ++it) {
const Interface *superInterface = *it;
for (const auto &method : superInterface->methods()) {
out << "case "
<< superInterface->fqName().cppNamespace()
<< "::IHw"
<< superInterface->getBaseName()
<< "::Call::"
<< upcase(method->name())
<< ":\n{\n";
out.indent();
status_t err =
generateStubSourceForMethod(out, superInterface, method);
if (err != OK) {
return err;
}
out.unindent();
out << "}\n\n";
}
}
out << "default:\n{\n";
out.indent();
out << "return ::android::hardware::BnInterface<I"
<< baseName << ", IHw" << baseName
<< ">::onTransact(\n";
out.indent();
out.indent();
out << "_hidl_code, _hidl_data, _hidl_reply, "
<< "_hidl_flags, _hidl_cb);\n";
out.unindent();
out.unindent();
out.unindent();
out << "}\n";
out.unindent();
out << "}\n\n";
out << "if (_hidl_err == ::android::UNEXPECTED_NULL) {\n";
out.indent();
out << "_hidl_err = ::android::hardware::Status::fromExceptionCode(\n";
out.indent();
out.indent();
out << "::android::hardware::Status::EX_NULL_POINTER)\n";
out.indent();
out.indent();
out << ".writeToParcel(_hidl_reply);\n";
out.unindent();
out.unindent();
out.unindent();
out.unindent();
out.unindent();
out << "}\n\n";
out << "return _hidl_err;\n";
out.unindent();
out << "}\n\n";
return OK;
}
status_t AST::generateStubSourceForMethod(
Formatter &out, const Interface *iface, const Method *method) const {
out << "if (!_hidl_data.enforceInterface("
<< iface->fqName().cppNamespace()
<< "::IHw"
<< iface->getBaseName()
<< "::descriptor)) {\n";
out.indent();
out << "_hidl_err = ::android::BAD_TYPE;\n";
out << "break;\n";
out.unindent();
out << "}\n\n";
declareCppReaderLocals(out, method->args());
for (const auto &arg : method->args()) {
emitCppReaderWriter(
out,
"_hidl_data",
false /* parcelObjIsPointer */,
arg,
true /* reader */,
Type::ErrorMode_Break);
}
const bool returnsValue = !method->results().empty();
const TypedVar *elidedReturn = method->canElideCallback();
if (elidedReturn != nullptr) {
std::string extra;
out << elidedReturn->type().getCppResultType(&extra) << " ";
out << elidedReturn->name() << " = ";
out << method->name() << "(";
bool first = true;
for (const auto &arg : method->args()) {
if (!first) {
out << ", ";
}
if (arg->type().resultNeedsDeref()) {
out << "*";
}
out << arg->name();
first = false;
}
out << ");\n\n";
out << "::android::hardware::Status::ok()"
<< ".writeToParcel(_hidl_reply);\n\n";
elidedReturn->type().emitReaderWriter(
out,
elidedReturn->name(),
"_hidl_reply",
true, /* parcelObjIsPointer */
false, /* isReader */
Type::ErrorMode_Ignore);
out << "_hidl_cb(*_hidl_reply);\n";
} else {
if (returnsValue) {
out << "bool _hidl_callbackCalled = false;\n\n";
}
out << "::android::hardware::Status _hidl_status(\n";
out.indent();
out.indent();
out << method->name() << "(";
bool first = true;
for (const auto &arg : method->args()) {
if (!first) {
out << ", ";
}
if (arg->type().resultNeedsDeref()) {
out << "*";
}
out << arg->name();
first = false;
}
if (returnsValue) {
if (!first) {
out << ", ";
}
out << "[&](";
first = true;
for (const auto &arg : method->results()) {
if (!first) {
out << ", ";
}
out << "const auto &" << arg->name();
first = false;
}
out << ") {\n";
out.indent();
out << "_hidl_callbackCalled = true;\n\n";
out << "::android::hardware::Status::ok()"
<< ".writeToParcel(_hidl_reply);\n\n";
for (const auto &arg : method->results()) {
emitCppReaderWriter(
out,
"_hidl_reply",
true /* parcelObjIsPointer */,
arg,
false /* reader */,
Type::ErrorMode_Ignore);
}
out << "_hidl_cb(*_hidl_reply);\n";
out.unindent();
out << "}\n";
}
out.unindent();
out.unindent();
out << "));\n\n";
if (returnsValue) {
out << "if (!_hidl_callbackCalled) {\n";
out.indent();
}
out << "_hidl_err = _hidl_status.writeToParcel(_hidl_reply);\n";
if (returnsValue) {
out.unindent();
out << "}\n\n";
}
}
out << "break;\n";
return OK;
}
} // namespace android