10b57cec5SDimitry Andric //=== Serialization/PCHContainerOperations.cpp - PCH Containers -*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file defines PCHContainerOperations and RawPCHContainerOperation. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #include "clang/Serialization/PCHContainerOperations.h" 140b57cec5SDimitry Andric #include "clang/AST/ASTConsumer.h" 150b57cec5SDimitry Andric #include "llvm/Support/raw_ostream.h" 160b57cec5SDimitry Andric #include <utility> 170b57cec5SDimitry Andric 180b57cec5SDimitry Andric using namespace clang; 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric PCHContainerWriter::~PCHContainerWriter() {} 210b57cec5SDimitry Andric PCHContainerReader::~PCHContainerReader() {} 220b57cec5SDimitry Andric 230b57cec5SDimitry Andric namespace { 240b57cec5SDimitry Andric 250b57cec5SDimitry Andric /// A PCHContainerGenerator that writes out the PCH to a flat file. 260b57cec5SDimitry Andric class RawPCHContainerGenerator : public ASTConsumer { 270b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer; 280b57cec5SDimitry Andric std::unique_ptr<raw_pwrite_stream> OS; 290b57cec5SDimitry Andric 300b57cec5SDimitry Andric public: 310b57cec5SDimitry Andric RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS, 320b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer) 330b57cec5SDimitry Andric : Buffer(std::move(Buffer)), OS(std::move(OS)) {} 340b57cec5SDimitry Andric 350b57cec5SDimitry Andric ~RawPCHContainerGenerator() override = default; 360b57cec5SDimitry Andric 370b57cec5SDimitry Andric void HandleTranslationUnit(ASTContext &Ctx) override { 380b57cec5SDimitry Andric if (Buffer->IsComplete) { 390b57cec5SDimitry Andric // Make sure it hits disk now. 400b57cec5SDimitry Andric *OS << Buffer->Data; 410b57cec5SDimitry Andric OS->flush(); 420b57cec5SDimitry Andric } 430b57cec5SDimitry Andric // Free the space of the temporary buffer. 440b57cec5SDimitry Andric llvm::SmallVector<char, 0> Empty; 450b57cec5SDimitry Andric Buffer->Data = std::move(Empty); 460b57cec5SDimitry Andric } 470b57cec5SDimitry Andric }; 480b57cec5SDimitry Andric 490b57cec5SDimitry Andric } // anonymous namespace 500b57cec5SDimitry Andric 510b57cec5SDimitry Andric std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator( 520b57cec5SDimitry Andric CompilerInstance &CI, const std::string &MainFileName, 530b57cec5SDimitry Andric const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS, 540b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer) const { 55a7dea167SDimitry Andric return std::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer); 560b57cec5SDimitry Andric } 570b57cec5SDimitry Andric 58*06c3fb27SDimitry Andric ArrayRef<llvm::StringRef> RawPCHContainerReader::getFormats() const { 59*06c3fb27SDimitry Andric static StringRef Raw("raw"); 60*06c3fb27SDimitry Andric return ArrayRef(Raw); 61*06c3fb27SDimitry Andric } 62*06c3fb27SDimitry Andric 630b57cec5SDimitry Andric StringRef 640b57cec5SDimitry Andric RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const { 650b57cec5SDimitry Andric return Buffer.getBuffer(); 660b57cec5SDimitry Andric } 670b57cec5SDimitry Andric 680b57cec5SDimitry Andric PCHContainerOperations::PCHContainerOperations() { 69a7dea167SDimitry Andric registerWriter(std::make_unique<RawPCHContainerWriter>()); 70a7dea167SDimitry Andric registerReader(std::make_unique<RawPCHContainerReader>()); 710b57cec5SDimitry Andric } 72