| /* |
| * 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 "MemoryType.h" |
| |
| #include "HidlTypeAssertion.h" |
| |
| #include <hidl-util/Formatter.h> |
| #include <android-base/logging.h> |
| |
| namespace android { |
| |
| MemoryType::MemoryType(Scope* parent) : Type(parent, "memory") {} |
| |
| std::string MemoryType::getCppType(StorageMode mode, |
| bool specifyNamespaces) const { |
| const std::string base = |
| std::string(specifyNamespaces ? "::android::hardware::" : "") |
| + "hidl_memory"; |
| |
| switch (mode) { |
| case StorageMode_Stack: |
| return base; |
| |
| case StorageMode_Argument: |
| return "const " + base + "&"; |
| |
| case StorageMode_Result: |
| return "const " + base + "*"; |
| } |
| } |
| |
| std::string MemoryType::typeName() const { |
| return "memory"; |
| } |
| |
| std::string MemoryType::getVtsType() const { |
| return "TYPE_HIDL_MEMORY"; |
| } |
| |
| std::string MemoryType::getJavaType(bool /* forInitializer */) const { |
| return "android.os.HidlMemory"; |
| } |
| |
| std::string MemoryType::getJavaSuffix() const { |
| return "HidlMemory"; |
| } |
| |
| void MemoryType::emitJavaFieldInitializer( |
| Formatter &out, const std::string &fieldName) const { |
| const std::string fieldDeclaration = getJavaType(false) + " " + fieldName; |
| emitJavaFieldDefaultInitialValue(out, fieldDeclaration); |
| } |
| |
| void MemoryType::emitJavaFieldDefaultInitialValue( |
| Formatter &out, const std::string &declaredFieldName) const { |
| out << declaredFieldName |
| << " = null;\n"; |
| } |
| |
| void MemoryType::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 << "try {\n"; |
| out.indent(); |
| out << fieldName |
| << " = " |
| << parcelName |
| << ".readEmbeddedHidlMemory(\n"; |
| |
| out << blobName << ".getFieldHandle(" << offset << "),\n" |
| << blobName << ".handle(),\n" |
| << offset |
| << ").dup();\n"; |
| out.unindent(); |
| out << "} catch (java.io.IOException e) {\n"; |
| out.indent(); |
| out << "throw new RuntimeException(e);\n"; |
| out.unindent(); |
| out << "}\n"; |
| |
| return; |
| } |
| |
| out << blobName |
| << ".putHidlMemory(" |
| << offset |
| << ", " |
| << fieldName |
| << ");\n"; |
| } |
| |
| void MemoryType::emitJavaReaderWriter(Formatter& out, |
| const std::string& parcelObj, |
| const std::string& argName, |
| bool isReader) const { |
| if (isReader) { |
| // The weird-looking lambda code below is intended to replace an |
| // IOException with a RuntimeException within an expression context. |
| out << "((java.util.function.Function<android.os.HwParcel, android.os.HidlMemory>)" |
| " _parcel -> {\n"; |
| out.indent(); |
| out << "try {\n"; |
| out.indent(); |
| out << "return _parcel.readHidlMemory().dup();\n"; |
| out.unindent(); |
| out << "} catch (java.io.IOException e) {\n"; |
| out.indent(); |
| out << "throw new RuntimeException(e);\n"; |
| out.unindent(); |
| out << "}\n"; |
| out.unindent(); |
| out << "}).apply(" << parcelObj << ");\n"; |
| } else { |
| out << parcelObj |
| << ".writeHidlMemory(" |
| << argName |
| << ");\n"; |
| } |
| } |
| |
| void MemoryType::emitReaderWriter( |
| Formatter &out, |
| const std::string &name, |
| const std::string &parcelObj, |
| bool parcelObjIsPointer, |
| bool isReader, |
| ErrorMode mode) const { |
| const std::string parentName = "_hidl_" + name + "_parent"; |
| out << "size_t " << parentName << ";\n\n"; |
| |
| const std::string parcelObjDeref = |
| parcelObj + (parcelObjIsPointer ? "->" : "."); |
| |
| if (isReader) { |
| out << "_hidl_err = " |
| << parcelObjDeref |
| << "readBuffer(" |
| << "sizeof(*" |
| << name |
| << "), &" |
| << parentName |
| << ", " |
| << " reinterpret_cast<const void **>(" |
| << "&" << name |
| << "));\n\n"; |
| |
| handleError(out, mode); |
| } else { |
| out << "_hidl_err = " |
| << parcelObjDeref |
| << "writeBuffer(&" |
| << name |
| << ", sizeof(" |
| << name |
| << "), &" |
| << parentName |
| << ");\n"; |
| |
| handleError(out, mode); |
| } |
| |
| emitReaderWriterEmbedded( |
| out, |
| 0 /* depth */, |
| name, |
| name /* sanitizedName */, |
| isReader /* nameIsPointer */, |
| parcelObj, |
| parcelObjIsPointer, |
| isReader, |
| mode, |
| parentName, |
| "0 /* parentOffset */"); |
| } |
| |
| void MemoryType::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, |
| "::android::hardware::hidl_memory", |
| "" /* childName */, |
| "::android::hardware"); |
| } |
| |
| bool MemoryType::needsEmbeddedReadWrite() const { |
| return true; |
| } |
| |
| bool MemoryType::resultNeedsDeref() const { |
| return true; |
| } |
| |
| bool MemoryType::isMemory() const { |
| return true; |
| } |
| |
| bool MemoryType::deepIsJavaCompatible(std::unordered_set<const Type*>* /* visited */) const { |
| return true; |
| } |
| |
| static HidlTypeAssertion assertion("hidl_memory", 40 /* size */); |
| void MemoryType::getAlignmentAndSize(size_t *align, size_t *size) const { |
| *align = 8; // hidl_memory |
| *size = assertion.size(); |
| } |
| |
| void MemoryType::emitVtsTypeDeclarations(Formatter& out) const { |
| out << "type: " << getVtsType() << "\n"; |
| } |
| |
| } // namespace android |
| |