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CompoundType.cpp
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CompoundType.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 "CompoundType.h"
#include "ArrayType.h"
#include "Reference.h"
#include "ScalarType.h"
#include "VectorType.h"
#include <android-base/logging.h>
#include <hidl-util/Formatter.h>
#include <iostream>
#include <set>
#include <string>
#include <unordered_set>
#include <vector>
namespace android {
CompoundType::CompoundType(Style style, const std::string& localName, const FQName& fullName,
const Location& location, Scope* parent)
: Scope(localName, fullName, location, parent), mStyle(style) {}
CompoundType::Style CompoundType::style() const {
return mStyle;
}
void CompoundType::addField(NamedReference<Type>* field) {
mFields.push_back(field);
}
std::vector<const NamedReference<Type>*> CompoundType::getFields() const {
return std::vector<const NamedReference<Type>*>(mFields.begin(), mFields.end());
}
std::vector<const Reference<Type>*> CompoundType::getReferences() const {
std::vector<const Reference<Type>*> ret;
ret.insert(ret.begin(), mFields.begin(), mFields.end());
return ret;
}
status_t CompoundType::validate() const {
for (const auto* field : mFields) {
const Type& type = field->type();
if ((type.isVector() && static_cast<const VectorType*>(&type)->isVectorOfBinders())) {
std::cerr << "ERROR: Struct/union cannot contain vectors of interfaces at "
<< field->location() << "\n";
return UNKNOWN_ERROR;
}
if (mStyle == STYLE_UNION) {
if (type.isInterface()) {
std::cerr << "ERROR: Union cannot contain interfaces at " << field->location()
<< "\n";
return UNKNOWN_ERROR;
}
if (type.needsEmbeddedReadWrite()) {
std::cerr << "ERROR: Union must not contain any types that need fixup at "
<< field->location() << "\n";
return UNKNOWN_ERROR;
}
}
}
if (mStyle == STYLE_SAFE_UNION && mFields.size() < 2) {
std::cerr << "ERROR: Safe union must contain at least two types to be useful at "
<< location() << "\n";
return UNKNOWN_ERROR;
}
status_t err = validateUniqueNames();
if (err != OK) return err;
err = validateSubTypeNames();
if (err != OK) return err;
return Scope::validate();
}
status_t CompoundType::validateUniqueNames() const {
std::unordered_set<std::string> names;
for (const auto* field : mFields) {
if (names.find(field->name()) != names.end()) {
std::cerr << "ERROR: Redefinition of field '" << field->name() << "' at "
<< field->location() << "\n";
return UNKNOWN_ERROR;
}
names.insert(field->name());
}
return OK;
}
void CompoundType::emitInvalidSubTypeNamesError(const std::string& subTypeName,
const Location& location) const {
std::cerr << "ERROR: Type name '" << subTypeName << "' defined at " << location
<< " conflicts with a member function of "
<< "safe_union " << definedName() << ". Consider renaming or "
<< "moving its definition outside the safe_union scope.\n";
}
status_t CompoundType::validateSubTypeNames() const {
if (mStyle != STYLE_SAFE_UNION) { return OK; }
const auto& subTypes = Scope::getSubTypes();
for (const auto& subType : subTypes) {
if (subType->definedName() == "getDiscriminator") {
emitInvalidSubTypeNamesError(subType->definedName(), subType->location());
return UNKNOWN_ERROR;
}
}
return OK;
}
bool CompoundType::isCompoundType() const {
return true;
}
bool CompoundType::deepCanCheckEquality(std::unordered_set<const Type*>* visited) const {
if (mStyle == STYLE_UNION) {
return false;
}
for (const auto* field : mFields) {
if (!field->get()->canCheckEquality(visited)) {
return false;
}
}
return true;
}
std::string CompoundType::typeName() const {
switch (mStyle) {
case STYLE_STRUCT: {
return "struct " + definedName();
}
case STYLE_UNION: {
return "union " + definedName();
}
case STYLE_SAFE_UNION: {
return "safe_union " + definedName();
}
}
CHECK(!"Should not be here");
}
std::string CompoundType::getCppType(
StorageMode mode,
bool /* specifyNamespaces */) const {
const std::string base = fullName();
switch (mode) {
case StorageMode_Stack:
return base;
case StorageMode_Argument:
return "const " + base + "&";
case StorageMode_Result:
return base + (containsInterface()?"":"*");
}
CHECK(!"Should not be here");
}
std::string CompoundType::getJavaType(bool /* forInitializer */) const {
return fullJavaName();
}
std::string CompoundType::getVtsType() const {
switch (mStyle) {
case STYLE_STRUCT:
{
return "TYPE_STRUCT";
}
case STYLE_UNION:
{
return "TYPE_UNION";
}
case STYLE_SAFE_UNION:
{
return "TYPE_SAFE_UNION";
}
}
CHECK(!"Should not be here");
}
bool CompoundType::containsInterface() const {
for (const auto& field : mFields) {
if (field->type().isCompoundType()) {
const Type& t = field->type();
const CompoundType* ct = static_cast<const CompoundType*>(&t);
if (ct->containsInterface()) {
return true;
}
}
if (field->type().isInterface()) {
return true;
}
}
return false;
}
void CompoundType::emitSafeUnionUnknownDiscriminatorError(Formatter& out, const std::string& value,
bool fatal) const {
if (fatal) {
out << "::android::hardware::details::logAlwaysFatal(";
} else {
out << "ALOGE(\"%s\", ";
}
out << "(\n";
out.indent(2, [&] {
out << "\"Unknown union discriminator (value: \" +\n"
<< "std::to_string(" << getUnionDiscriminatorType()->getCppTypeCast(value)
<< ") + \").\").c_str());\n";
});
}
void CompoundType::emitSafeUnionReaderWriterForInterfaces(
Formatter &out,
const std::string &name,
const std::string &parcelObj,
bool parcelObjIsPointer,
bool isReader,
ErrorMode mode) const {
CHECK(mStyle == STYLE_SAFE_UNION);
out.block([&] {
const auto discriminatorType = getUnionDiscriminatorType();
if (isReader) {
out << discriminatorType->getCppStackType()
<< " _hidl_d_primitive;\n";
} else {
out << "const "
<< discriminatorType->getCppStackType()
<< " _hidl_d_primitive = "
<< discriminatorType->getCppTypeCast(name + ".getDiscriminator()")
<< ";\n";
}
getUnionDiscriminatorType()->emitReaderWriter(out, "_hidl_d_primitive", parcelObj,
parcelObjIsPointer, isReader, mode);
out << "switch (("
<< fullName()
<< "::hidl_discriminator) _hidl_d_primitive) ";
out.block([&] {
for (const auto& field : mFields) {
out << "case " << fullName() << "::hidl_discriminator::" << field->name()
<< ": ";
const std::string tempFieldName = "_hidl_temp_" + field->name();
out.block([&] {
if (isReader) {
out << field->type().getCppResultType() << " " << tempFieldName
<< ";\n";
field->type().emitReaderWriter(out, tempFieldName, parcelObj,
parcelObjIsPointer, isReader, mode);
const std::string derefOperator =
field->type().resultNeedsDeref() ? "*" : "";
out << name << "." << field->name() << "(std::move(" << derefOperator
<< tempFieldName << "));\n";
} else {
const std::string fieldValue = name + "." + field->name() + "()";
out << field->type().getCppArgumentType() << " " << tempFieldName
<< " = " << fieldValue << ";\n";
field->type().emitReaderWriter(out, tempFieldName, parcelObj,
parcelObjIsPointer, isReader, mode);
}
out << "break;\n";
}).endl();
}
out << "default: ";
out.block([&] {
emitSafeUnionUnknownDiscriminatorError(out, "_hidl_d_primitive",
!isReader /*fatal*/);
if (isReader) {
out << "_hidl_err = ::android::BAD_VALUE;\n";
handleError(out, mode);
}
}).endl();
}).endl();
}).endl();
}
void CompoundType::emitReaderWriter(
Formatter &out,
const std::string &name,
const std::string &parcelObj,
bool parcelObjIsPointer,
bool isReader,
ErrorMode mode) const {
const std::string parcelObjDeref =
parcelObj + (parcelObjIsPointer ? "->" : ".");
if(containsInterface()){
if (mStyle == STYLE_SAFE_UNION) {
emitSafeUnionReaderWriterForInterfaces(out, name, parcelObj,
parcelObjIsPointer,
isReader, mode);
return;
}
for (const auto& field : mFields) {
const std::string tempFieldName = "_hidl_temp_" + field->name();
const std::string fieldValue = name + "." + field->name();
out.block([&] {
if (isReader) {
out << field->type().getCppResultType()
<< " "
<< tempFieldName
<< ";\n";
} else {
out << field->type().getCppArgumentType()
<< " "
<< tempFieldName
<< " = "
<< fieldValue
<< ";\n";
}
field->type().emitReaderWriter(out, tempFieldName, parcelObj,
parcelObjIsPointer, isReader, mode);
if (isReader) {
const std::string derefOperator = field->type().resultNeedsDeref()
? "*" : "";
out << fieldValue
<< " = std::move("
<< derefOperator
<< tempFieldName
<< ");\n";
}
}).endl();
}
} else {
const std::string parentName = "_hidl_" + name + "_parent";
out << "size_t " << parentName << ";\n\n";
if (isReader) {
out << "_hidl_err = " << parcelObjDeref << "readBuffer("
<< "sizeof(*" << name << "), &" << parentName << ", "
<< " const_cast<const void**>(reinterpret_cast<void **>("
<< "&" << name << ")));\n";
handleError(out, mode);
} else {
out << "_hidl_err = "
<< parcelObjDeref
<< "writeBuffer(&"
<< name
<< ", sizeof("
<< name
<< "), &"
<< parentName
<< ");\n";
handleError(out, mode);
}
bool needEmbeddedReadWrite = needsEmbeddedReadWrite();
CHECK(mStyle != STYLE_UNION || !needEmbeddedReadWrite);
if (needEmbeddedReadWrite) {
emitReaderWriterEmbedded(out, 0 /* depth */, name, name, /* sanitizedName */
isReader /* nameIsPointer */, parcelObj, parcelObjIsPointer,
isReader, mode, parentName, "0 /* parentOffset */");
}
}
}
void CompoundType::emitReaderWriterEmbedded(
Formatter &out,
size_t /* depth */,
const std::string &name,
const std::string & /*sanitizedName */,
bool nameIsPointer,
const std::string &parcelObj,
bool parcelObjIsPointer,
bool isReader,
ErrorMode mode,
const std::string &parentName,
const std::string &offsetText) const {
emitReaderWriterEmbeddedForTypeName(
out,
name,
nameIsPointer,
parcelObj,
parcelObjIsPointer,
isReader,
mode,
parentName,
offsetText,
fullName(),
"" /* childName */,
"" /* namespace */);
}
void CompoundType::emitJavaReaderWriter(
Formatter &out,
const std::string &parcelObj,
const std::string &argName,
bool isReader) const {
if (isReader) {
out << "new " << fullJavaName() << "();\n";
}
out << "(" << getJavaTypeCast(argName) << ")."
<< (isReader ? "readFromParcel" : "writeToParcel") << "(" << parcelObj << ");\n";
}
void CompoundType::emitJavaFieldInitializer(
Formatter &out, const std::string &fieldName) const {
const std::string fieldDeclaration = fullJavaName() + " " + fieldName;
emitJavaFieldDefaultInitialValue(out, fieldDeclaration);
}
void CompoundType::emitJavaFieldDefaultInitialValue(
Formatter &out, const std::string &declaredFieldName) const {
out << declaredFieldName
<< " = new "
<< fullJavaName()
<< "();\n";
}
void CompoundType::emitJavaFieldReaderWriter(
Formatter &out,
size_t /* depth */,
const std::string &parcelName,
const std::string &blobName,
const std::string &fieldName,
const std::string &offset,
bool isReader) const {
if (isReader) {
out << "("
<< getJavaTypeCast(fieldName)
<< ").readEmbeddedFromParcel("
<< parcelName
<< ", "
<< blobName
<< ", "
<< offset
<< ");\n";
return;
}
out << fieldName
<< ".writeEmbeddedToBlob("
<< blobName
<< ", "
<< offset
<< ");\n";
}
void CompoundType::emitLayoutAsserts(Formatter& out, const Layout& layout,
const std::string& layoutName) const {
out << "static_assert(sizeof("
<< fullName()
<< layoutName
<< ") == "
<< layout.size
<< ", \"wrong size\");\n";
out << "static_assert(__alignof("
<< fullName()
<< layoutName
<< ") == "
<< layout.align
<< ", \"wrong alignment\");\n";
}
void CompoundType::emitSafeUnionTypeDeclarations(Formatter& out) const {
out << "struct " << definedName() << " final {\n";
out.indent();
Scope::emitTypeDeclarations(out);
bool hasPointer = containsPointer();
CompoundLayout layout = hasPointer
? CompoundLayout()
: getCompoundAlignmentAndSize();
out << "enum class hidl_discriminator : "
<< getUnionDiscriminatorType()->getCppType(StorageMode_Stack, false)
<< " ";
out.block([&] {
for (size_t idx = 0; idx < mFields.size(); idx++) {
const auto& field = mFields.at(idx);
field->emitDocComment(out);
out << field->name()
<< " = "
<< idx
<< ", // "
<< field->type().getCppStackType(true /*specifyNamespaces*/)
<< "\n";
}
});
out << ";\n\n";
out << definedName() << "();\n" // Constructor
<< "~" << definedName() << "();\n" // Destructor
<< definedName() << "(" << definedName() << "&&);\n" // Move constructor
<< definedName() << "(const " << definedName() << "&);\n" // Copy constructor
<< definedName() << "& operator=(" << definedName() << "&&);\n" // Move assignment
<< definedName() << "& operator=(const " << definedName() << "&);\n\n"; // Copy assignment
for (const auto& field : mFields) {
// Setter (copy)
out << "void "
<< field->name()
<< "("
<< field->type().getCppArgumentType()
<< ");\n";
if (field->type().resolveToScalarType() == nullptr) {
// Setter (move)
out << "void "
<< field->name()
<< "("
<< field->type().getCppStackType()
<< "&&);\n";
}
// Getter (mutable)
out << field->type().getCppStackType()
<< "& "
<< field->name()
<< "();\n";
// Getter (immutable)
out << field->type().getCppArgumentType()
<< " "
<< field->name()
<< "() const;\n\n";
}
out << "// Utility methods\n";
out << "hidl_discriminator getDiscriminator() const;\n\n";
out << "constexpr size_t hidl_getUnionOffset() const ";
out.block([&] {
out << "return offsetof(" << fullName() << ", hidl_u);\n";
}).endl().endl();
out.unindent();
out << "private:\n";
out.indent();
out << "void hidl_destructUnion();\n\n";
out << "hidl_discriminator hidl_d";
if (!hasPointer) {
out << " __attribute__ ((aligned("
<< layout.discriminator.align << "))) ";
}
out << ";\n";
out << "union hidl_union final {\n";
out.indent();
for (const auto& field : mFields) {
size_t fieldAlign, fieldSize;
field->type().getAlignmentAndSize(&fieldAlign, &fieldSize);
out << field->type().getCppStackType()
<< " "
<< field->name();
if (!hasPointer) {
out << " __attribute__ ((aligned("
<< fieldAlign
<< ")))";
}
out << ";\n";
}
out << "\n"
<< "hidl_union();\n"
<< "~hidl_union();\n";
out.unindent();
out << "} hidl_u;\n";
if (!hasPointer) {
out << "\n";
emitLayoutAsserts(out, layout.innerStruct, "::hidl_union");
emitLayoutAsserts(out, layout.discriminator, "::hidl_discriminator");
}
out.unindent();
out << "};\n\n";
if (!hasPointer) {
emitLayoutAsserts(out, layout.overall, "");
out << "\n";
}
}
void CompoundType::emitFieldHidlDefinition(Formatter& out, const NamedReference<Type>& ref) const {
if (ref.getDocComment() != nullptr) ref.getDocComment()->emit(out);
if (ref.definedInline()) {
// Same check as above, this is for sanity
CHECK(ref.get()->isCompoundType());
static_cast<const CompoundType*>(ref.get())->emitInlineHidlDefinition(out);
out << " " << ref.name() << ";\n";
} else {
out << ref.localName() << " " << ref.name() << ";\n";
}
}
void CompoundType::emitInlineHidlDefinition(Formatter& out) const {
if (getDocComment() != nullptr) getDocComment()->emit(out);
out << typeName() << " ";
std::set<FQName> namesDeclaredInScope;
for (const NamedReference<Type>* ref : mFields) {
if (ref->definedInline()) {
const Type* type = ref->get();
CHECK(type->isCompoundType()) << " only compound types can be defined inline";
namesDeclaredInScope.insert(static_cast<const CompoundType*>(type)->fqName());
}
}
std::vector<const NamedType*> preDeclaredTypes;
for (const NamedType* namedType : getSortedDefinedTypes()) {
if (namesDeclaredInScope.find(namedType->fqName()) == namesDeclaredInScope.end()) {
// have to predeclare it
preDeclaredTypes.push_back(namedType);
}
}
out << "{";
out.indent([&] {
size_t preDeclaredTypesIdx = 0;
size_t fieldIdx = 0;
while (preDeclaredTypesIdx < preDeclaredTypes.size() && fieldIdx < mFields.size()) {
out << "\n";
if (preDeclaredTypes.at(preDeclaredTypesIdx)->location() <
mFields.at(fieldIdx)->location()) {
preDeclaredTypes.at(preDeclaredTypesIdx++)->emitHidlDefinition(out);
} else {
emitFieldHidlDefinition(out, *mFields.at(fieldIdx++));
}
}
while (preDeclaredTypesIdx < preDeclaredTypes.size()) {
out << "\n";
preDeclaredTypes.at(preDeclaredTypesIdx++)->emitHidlDefinition(out);
}
while (fieldIdx < mFields.size()) {
out << "\n";
emitFieldHidlDefinition(out, *mFields.at(fieldIdx++));
}
});
out << "}";
}
void CompoundType::emitHidlDefinition(Formatter& out) const {
emitInlineHidlDefinition(out);
out << ";\n";
}
void CompoundType::emitTypeDeclarations(Formatter& out) const {
if (mStyle == STYLE_SAFE_UNION) {
emitSafeUnionTypeDeclarations(out);
return;
}
out << ((mStyle == STYLE_STRUCT) ? "struct" : "union") << " " << definedName() << " final {\n";
out.indent();
Scope::emitTypeDeclarations(out);
if (containsPointer()) {
for (const auto& field : mFields) {
field->emitDocComment(out);
out << field->type().getCppStackType()
<< " "
<< field->name()
<< ";\n";
}
out.unindent();
out << "};\n\n";
return;
}
for (int pass = 0; pass < 2; ++pass) {
size_t offset = 0;
for (const auto& field : mFields) {
size_t fieldAlign, fieldSize;
field->type().getAlignmentAndSize(&fieldAlign, &fieldSize);
offset += Layout::getPad(offset, fieldAlign);
if (pass == 0) {
field->emitDocComment(out);
out << field->type().getCppStackType()
<< " "
<< field->name()
<< " __attribute__ ((aligned("
<< fieldAlign
<< ")));\n";
} else {
out << "static_assert(offsetof("
<< fullName()
<< ", "
<< field->name()
<< ") == "
<< offset
<< ", \"wrong offset\");\n";
}
if (mStyle == STYLE_STRUCT) {
offset += fieldSize;
}
}
if (pass == 0) {
out.unindent();
out << "};\n\n";
}
}
CompoundLayout layout = getCompoundAlignmentAndSize();
emitLayoutAsserts(out, layout.overall, "");
out << "\n";
}
void CompoundType::emitTypeForwardDeclaration(Formatter& out) const {
switch (mStyle) {
case STYLE_UNION: {
out << "union";
break;
}
case STYLE_STRUCT:
case STYLE_SAFE_UNION: {
out << "struct";
break;
}
default: {
CHECK(!"Should not be here");
}
}
out << " " << definedName() << ";\n";
}
void CompoundType::emitPackageTypeDeclarations(Formatter& out) const {
Scope::emitPackageTypeDeclarations(out);
out << "static inline std::string toString(" << getCppArgumentType() << " o);\n";
out << "static inline void PrintTo(" << getCppArgumentType() << " o, ::std::ostream*);\n";
if (canCheckEquality()) {
out << "static inline bool operator==("
<< getCppArgumentType() << " lhs, " << getCppArgumentType() << " rhs);\n";
out << "static inline bool operator!=("
<< getCppArgumentType() << " lhs, " << getCppArgumentType() << " rhs);\n";
} else {
out << "// operator== and operator!= are not generated for " << definedName() << "\n";
}
out.endl();
}
void CompoundType::emitPackageTypeHeaderDefinitions(Formatter& out) const {
Scope::emitPackageTypeHeaderDefinitions(out);
out << "static inline std::string toString(" << getCppArgumentType()
<< (mFields.empty() ? "" : " o") << ") ";
out.block([&] {
// include toString for scalar types
out << "using ::android::hardware::toString;\n"
<< "std::string os;\n";
out << "os += \"{\";\n";
if (mStyle == STYLE_SAFE_UNION) {
out << "\nswitch (o.getDiscriminator()) {\n";
out.indent();
}
for (const NamedReference<Type>* field : mFields) {
if (mStyle == STYLE_SAFE_UNION) {
out << "case "
<< fullName()
<< "::hidl_discriminator::"
<< field->name()
<< ": ";
out.block([&] {
out << "os += \"."
<< field->name()
<< " = \";\n"
<< "os += toString(o."
<< field->name()
<< "());\n"
<< "break;\n";
}).endl();
} else {
out << "os += \"";
if (field != *(mFields.begin())) {
out << ", ";
}
out << "." << field->name() << " = \";\n";
field->type().emitDump(out, "os", "o." + field->name());
}
}
if (mStyle == STYLE_SAFE_UNION) {
out << "default: ";
out.block([&] {
emitSafeUnionUnknownDiscriminatorError(out, "o.getDiscriminator()",
true /*fatal*/);
})
.endl();
out.unindent();
out << "}\n";
}
out << "os += \"}\"; return os;\n";
}).endl().endl();
out << "static inline void PrintTo(" << getCppArgumentType() << " o, ::std::ostream* os) ";
out.block([&] { out << "*os << toString(o);\n"; }).endl().endl();
if (canCheckEquality()) {
out << "static inline bool operator==(" << getCppArgumentType() << " "
<< (mFields.empty() ? "/* lhs */" : "lhs") << ", " << getCppArgumentType() << " "
<< (mFields.empty() ? "/* rhs */" : "rhs") << ") ";
out.block([&] {
if (mStyle == STYLE_SAFE_UNION) {
out.sIf("lhs.getDiscriminator() != rhs.getDiscriminator()", [&] {
out << "return false;\n";
}).endl();
out << "switch (lhs.getDiscriminator()) {\n";
out.indent();
}
for (const auto& field : mFields) {
if (mStyle == STYLE_SAFE_UNION) {
out << "case "
<< fullName()
<< "::hidl_discriminator::"
<< field->name()
<< ": ";
out.block([&] {
out << "return (lhs."
<< field->name()
<< "() == rhs."
<< field->name()
<< "());\n";
}).endl();
} else {
out.sIf("lhs." + field->name() + " != rhs." + field->name(), [&] {
out << "return false;\n";
}).endl();
}
}
if (mStyle == STYLE_SAFE_UNION) {
out << "default: ";
out.block([&] {
emitSafeUnionUnknownDiscriminatorError(out, "lhs.getDiscriminator()",
true /*fatal*/);
})
.endl();
out.unindent();
out << "}\n";
}
out << "return true;\n";
}).endl().endl();
out << "static inline bool operator!=("
<< getCppArgumentType() << " lhs, " << getCppArgumentType() << " rhs)";
out.block([&] {
out << "return !(lhs == rhs);\n";
}).endl().endl();
} else {
out << "// operator== and operator!= are not generated for " << definedName() << "\n\n";
}
}
void CompoundType::emitPackageHwDeclarations(Formatter& out) const {
Scope::emitPackageHwDeclarations(out);
if (needsEmbeddedReadWrite()) {
out << "::android::status_t readEmbeddedFromParcel(\n";
out.indent(2);
out << "const " << fullName() << " &obj,\n"
<< "const ::android::hardware::Parcel &parcel,\n"
<< "size_t parentHandle,\n"
<< "size_t parentOffset);\n\n";
out.unindent(2);
out << "::android::status_t writeEmbeddedToParcel(\n";
out.indent(2);
out << "const " << fullName() << " &obj,\n"
<< "::android::hardware::Parcel *parcel,\n"
<< "size_t parentHandle,\n"
<< "size_t parentOffset);\n\n";
out.unindent(2);
}
}
static void emitSafeUnionFieldConstructor(Formatter& out,
const NamedReference<Type>* field,
const std::string& initializerObjectName) {
out << "new (&hidl_u."
<< field->name()
<< ") "
<< field->type().getCppStackType()
<< "("
<< initializerObjectName
<< ");\n";
}
static void emitSafeUnionSetterDefinition(Formatter& out,
const NamedReference<Type>* field,
const std::string& parameterName,
bool usesMoveSemantics) {
out.block([&] {
out << "if (hidl_d != hidl_discriminator::"
<< field->name()
<< ") ";
const std::string argumentName = usesMoveSemantics
? ("std::move(" + parameterName + ")")
: parameterName;
out.block([&] {
out << "hidl_destructUnion();\n"
<< "::std::memset(&hidl_u, 0, sizeof(hidl_u));\n\n";
emitSafeUnionFieldConstructor(out, field, argumentName);
out << "hidl_d = hidl_discriminator::"
<< field->name()
<< ";\n";
}).endl();
out << "else if (&(hidl_u."
<< field->name()
<< ") != &"
<< parameterName
<< ") ";
out.block([&] {
out << "hidl_u."
<< field->name()
<< " = "
<< argumentName
<< ";\n";
}).endl();
}).endl().endl();
}
static void emitSafeUnionGetterDefinition(Formatter& out, const std::string& fieldName) {
out.block([&] {
out << "if (CC_UNLIKELY(hidl_d != hidl_discriminator::"
<< fieldName
<< ")) ";