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0b57cec536
This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next.
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//===- InMemoryModuleCache.cpp - Cache for loaded memory buffers ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Serialization/InMemoryModuleCache.h"
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#include "llvm/Support/MemoryBuffer.h"
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using namespace clang;
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InMemoryModuleCache::State
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InMemoryModuleCache::getPCMState(llvm::StringRef Filename) const {
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auto I = PCMs.find(Filename);
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if (I == PCMs.end())
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return Unknown;
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if (I->second.IsFinal)
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return Final;
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return I->second.Buffer ? Tentative : ToBuild;
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}
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llvm::MemoryBuffer &
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InMemoryModuleCache::addPCM(llvm::StringRef Filename,
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std::unique_ptr<llvm::MemoryBuffer> Buffer) {
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auto Insertion = PCMs.insert(std::make_pair(Filename, std::move(Buffer)));
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assert(Insertion.second && "Already has a PCM");
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return *Insertion.first->second.Buffer;
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}
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llvm::MemoryBuffer &
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InMemoryModuleCache::addBuiltPCM(llvm::StringRef Filename,
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std::unique_ptr<llvm::MemoryBuffer> Buffer) {
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auto &PCM = PCMs[Filename];
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assert(!PCM.IsFinal && "Trying to override finalized PCM?");
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assert(!PCM.Buffer && "Trying to override tentative PCM?");
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PCM.Buffer = std::move(Buffer);
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PCM.IsFinal = true;
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return *PCM.Buffer;
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}
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llvm::MemoryBuffer *
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InMemoryModuleCache::lookupPCM(llvm::StringRef Filename) const {
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auto I = PCMs.find(Filename);
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if (I == PCMs.end())
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return nullptr;
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return I->second.Buffer.get();
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}
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bool InMemoryModuleCache::isPCMFinal(llvm::StringRef Filename) const {
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return getPCMState(Filename) == Final;
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}
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bool InMemoryModuleCache::shouldBuildPCM(llvm::StringRef Filename) const {
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return getPCMState(Filename) == ToBuild;
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}
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bool InMemoryModuleCache::tryToDropPCM(llvm::StringRef Filename) {
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auto I = PCMs.find(Filename);
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assert(I != PCMs.end() && "PCM to remove is unknown...");
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auto &PCM = I->second;
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assert(PCM.Buffer && "PCM to remove is scheduled to be built...");
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if (PCM.IsFinal)
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return true;
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PCM.Buffer.reset();
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return false;
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}
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void InMemoryModuleCache::finalizePCM(llvm::StringRef Filename) {
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auto I = PCMs.find(Filename);
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assert(I != PCMs.end() && "PCM to finalize is unknown...");
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auto &PCM = I->second;
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assert(PCM.Buffer && "Trying to finalize a dropped PCM...");
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PCM.IsFinal = true;
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}
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