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//===- InMemoryModuleCache.cpp - Cache for loaded memory buffers ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Serialization/InMemoryModuleCache.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace clang;
llvm::MemoryBuffer &
InMemoryModuleCache::addBuffer(llvm::StringRef Filename,
std::unique_ptr<llvm::MemoryBuffer> Buffer) {
auto Insertion = PCMs.insert({Filename, PCM{std::move(Buffer), NextIndex++}});
assert(Insertion.second && "Already has a buffer");
return *Insertion.first->second.Buffer;
}
llvm::MemoryBuffer *
InMemoryModuleCache::lookupBuffer(llvm::StringRef Filename) {
auto I = PCMs.find(Filename);
if (I == PCMs.end())
return nullptr;
return I->second.Buffer.get();
}
bool InMemoryModuleCache::isBufferFinal(llvm::StringRef Filename) {
auto I = PCMs.find(Filename);
if (I == PCMs.end())
return false;
return I->second.Index < FirstRemovableIndex;
}
bool InMemoryModuleCache::tryToRemoveBuffer(llvm::StringRef Filename) {
auto I = PCMs.find(Filename);
assert(I != PCMs.end() && "No buffer to remove...");
if (I->second.Index < FirstRemovableIndex)
return true;
PCMs.erase(I);
return false;
}
void InMemoryModuleCache::finalizeCurrentBuffers() {
FirstRemovableIndex = NextIndex;
}
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