1 //===- MemoryBufferCache.cpp - Cache for loaded memory buffers ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Basic/MemoryBufferCache.h"
11 #include "llvm/Support/MemoryBuffer.h"
13 using namespace clang;
16 MemoryBufferCache::addBuffer(llvm::StringRef Filename,
17 std::unique_ptr<llvm::MemoryBuffer> Buffer) {
19 Buffers.insert({Filename, BufferEntry{std::move(Buffer), NextIndex++}});
20 assert(Insertion.second && "Already has a buffer");
21 return *Insertion.first->second.Buffer;
24 llvm::MemoryBuffer *MemoryBufferCache::lookupBuffer(llvm::StringRef Filename) {
25 auto I = Buffers.find(Filename);
26 if (I == Buffers.end())
28 return I->second.Buffer.get();
31 bool MemoryBufferCache::isBufferFinal(llvm::StringRef Filename) {
32 auto I = Buffers.find(Filename);
33 if (I == Buffers.end())
35 return I->second.Index < FirstRemovableIndex;
38 bool MemoryBufferCache::tryToRemoveBuffer(llvm::StringRef Filename) {
39 auto I = Buffers.find(Filename);
40 assert(I != Buffers.end() && "No buffer to remove...");
41 if (I->second.Index < FirstRemovableIndex)
48 void MemoryBufferCache::finalizeCurrentBuffers() { FirstRemovableIndex = NextIndex; }