72 lines · cpp
1//=== Serialization/PCHContainerOperations.cpp - PCH Containers -*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file defines PCHContainerOperations and RawPCHContainerOperation.10//11//===----------------------------------------------------------------------===//12 13#include "clang/Serialization/PCHContainerOperations.h"14#include "clang/AST/ASTConsumer.h"15#include "llvm/Support/raw_ostream.h"16#include <utility>17 18using namespace clang;19 20PCHContainerWriter::~PCHContainerWriter() {}21PCHContainerReader::~PCHContainerReader() {}22 23namespace {24 25/// A PCHContainerGenerator that writes out the PCH to a flat file.26class RawPCHContainerGenerator : public ASTConsumer {27 std::shared_ptr<PCHBuffer> Buffer;28 std::unique_ptr<raw_pwrite_stream> OS;29 30public:31 RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS,32 std::shared_ptr<PCHBuffer> Buffer)33 : Buffer(std::move(Buffer)), OS(std::move(OS)) {}34 35 ~RawPCHContainerGenerator() override = default;36 37 void HandleTranslationUnit(ASTContext &Ctx) override {38 if (Buffer->IsComplete) {39 // Make sure it hits disk now.40 *OS << Buffer->Data;41 OS->flush();42 }43 // Free the space of the temporary buffer.44 llvm::SmallVector<char, 0> Empty;45 Buffer->Data = std::move(Empty);46 }47};48 49} // anonymous namespace50 51std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator(52 CompilerInstance &CI, const std::string &MainFileName,53 const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS,54 std::shared_ptr<PCHBuffer> Buffer) const {55 return std::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer);56}57 58ArrayRef<llvm::StringRef> RawPCHContainerReader::getFormats() const {59 static StringRef Raw("raw");60 return ArrayRef(Raw);61}62 63StringRef64RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {65 return Buffer.getBuffer();66}67 68PCHContainerOperations::PCHContainerOperations() {69 registerWriter(std::make_unique<RawPCHContainerWriter>());70 registerReader(std::make_unique<RawPCHContainerReader>());71}72