| //===--- Frontend/PCHContainerOperations.cpp - PCH Containers ---*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines PCHContainerOperations and RawPCHContainerOperation. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Frontend/PCHContainerOperations.h" |
| #include "clang/AST/ASTConsumer.h" |
| #include "clang/Lex/ModuleLoader.h" |
| #include "llvm/Bitcode/BitstreamReader.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <utility> |
| |
| using namespace clang; |
| |
| PCHContainerWriter::~PCHContainerWriter() {} |
| PCHContainerReader::~PCHContainerReader() {} |
| |
| namespace { |
| |
| /// \brief A PCHContainerGenerator that writes out the PCH to a flat file. |
| class RawPCHContainerGenerator : public ASTConsumer { |
| std::shared_ptr<PCHBuffer> Buffer; |
| std::unique_ptr<raw_pwrite_stream> OS; |
| |
| public: |
| RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS, |
| std::shared_ptr<PCHBuffer> Buffer) |
| : Buffer(std::move(Buffer)), OS(std::move(OS)) {} |
| |
| ~RawPCHContainerGenerator() override = default; |
| |
| void HandleTranslationUnit(ASTContext &Ctx) override { |
| if (Buffer->IsComplete) { |
| // Make sure it hits disk now. |
| *OS << Buffer->Data; |
| OS->flush(); |
| } |
| // Free the space of the temporary buffer. |
| llvm::SmallVector<char, 0> Empty; |
| Buffer->Data = std::move(Empty); |
| } |
| }; |
| |
| } // anonymous namespace |
| |
| std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator( |
| CompilerInstance &CI, const std::string &MainFileName, |
| const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS, |
| std::shared_ptr<PCHBuffer> Buffer) const { |
| return llvm::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer); |
| } |
| |
| StringRef |
| RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const { |
| return Buffer.getBuffer(); |
| } |
| |
| PCHContainerOperations::PCHContainerOperations() { |
| registerWriter(llvm::make_unique<RawPCHContainerWriter>()); |
| registerReader(llvm::make_unique<RawPCHContainerReader>()); |
| } |