1*0b57cec5SDimitry Andric //=== Serialization/PCHContainerOperations.cpp - PCH Containers -*- C++ -*-===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file defines PCHContainerOperations and RawPCHContainerOperation. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #include "clang/Serialization/PCHContainerOperations.h" 14*0b57cec5SDimitry Andric #include "clang/AST/ASTConsumer.h" 15*0b57cec5SDimitry Andric #include "clang/Lex/ModuleLoader.h" 16*0b57cec5SDimitry Andric #include "llvm/Bitstream/BitstreamReader.h" 17*0b57cec5SDimitry Andric #include "llvm/Support/raw_ostream.h" 18*0b57cec5SDimitry Andric #include <utility> 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric using namespace clang; 21*0b57cec5SDimitry Andric 22*0b57cec5SDimitry Andric PCHContainerWriter::~PCHContainerWriter() {} 23*0b57cec5SDimitry Andric PCHContainerReader::~PCHContainerReader() {} 24*0b57cec5SDimitry Andric 25*0b57cec5SDimitry Andric namespace { 26*0b57cec5SDimitry Andric 27*0b57cec5SDimitry Andric /// A PCHContainerGenerator that writes out the PCH to a flat file. 28*0b57cec5SDimitry Andric class RawPCHContainerGenerator : public ASTConsumer { 29*0b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer; 30*0b57cec5SDimitry Andric std::unique_ptr<raw_pwrite_stream> OS; 31*0b57cec5SDimitry Andric 32*0b57cec5SDimitry Andric public: 33*0b57cec5SDimitry Andric RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS, 34*0b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer) 35*0b57cec5SDimitry Andric : Buffer(std::move(Buffer)), OS(std::move(OS)) {} 36*0b57cec5SDimitry Andric 37*0b57cec5SDimitry Andric ~RawPCHContainerGenerator() override = default; 38*0b57cec5SDimitry Andric 39*0b57cec5SDimitry Andric void HandleTranslationUnit(ASTContext &Ctx) override { 40*0b57cec5SDimitry Andric if (Buffer->IsComplete) { 41*0b57cec5SDimitry Andric // Make sure it hits disk now. 42*0b57cec5SDimitry Andric *OS << Buffer->Data; 43*0b57cec5SDimitry Andric OS->flush(); 44*0b57cec5SDimitry Andric } 45*0b57cec5SDimitry Andric // Free the space of the temporary buffer. 46*0b57cec5SDimitry Andric llvm::SmallVector<char, 0> Empty; 47*0b57cec5SDimitry Andric Buffer->Data = std::move(Empty); 48*0b57cec5SDimitry Andric } 49*0b57cec5SDimitry Andric }; 50*0b57cec5SDimitry Andric 51*0b57cec5SDimitry Andric } // anonymous namespace 52*0b57cec5SDimitry Andric 53*0b57cec5SDimitry Andric std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator( 54*0b57cec5SDimitry Andric CompilerInstance &CI, const std::string &MainFileName, 55*0b57cec5SDimitry Andric const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS, 56*0b57cec5SDimitry Andric std::shared_ptr<PCHBuffer> Buffer) const { 57*0b57cec5SDimitry Andric return llvm::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer); 58*0b57cec5SDimitry Andric } 59*0b57cec5SDimitry Andric 60*0b57cec5SDimitry Andric StringRef 61*0b57cec5SDimitry Andric RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const { 62*0b57cec5SDimitry Andric return Buffer.getBuffer(); 63*0b57cec5SDimitry Andric } 64*0b57cec5SDimitry Andric 65*0b57cec5SDimitry Andric PCHContainerOperations::PCHContainerOperations() { 66*0b57cec5SDimitry Andric registerWriter(llvm::make_unique<RawPCHContainerWriter>()); 67*0b57cec5SDimitry Andric registerReader(llvm::make_unique<RawPCHContainerReader>()); 68*0b57cec5SDimitry Andric } 69