llvm/clang/include/clang/Serialization/InMemoryModuleCache.h

//===- InMemoryModuleCache.h - In-memory cache for modules ------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H
#define LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H

#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>

namespace clang {

/// In-memory cache for modules.
///
/// This is a cache for modules for use across a compilation, sharing state
/// between the CompilerInstances in an implicit modules build.  It must be
/// shared by each CompilerInstance, ASTReader, ASTWriter, and ModuleManager
/// that are coordinating.
///
/// Critically, it ensures that a single process has a consistent view of each
/// PCM.  This is used by \a CompilerInstance when building PCMs to ensure that
/// each \a ModuleManager sees the same files.
class InMemoryModuleCache : public llvm::RefCountedBase<InMemoryModuleCache> { … };

} // end namespace clang

#endif // LLVM_CLANG_SERIALIZATION_INMEMORYMODULECACHE_H