//===------ NullResolver.h - Reject symbol lookup requests ------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//   Defines a RuntimeDyld::SymbolResolver subclass that rejects all symbol
// resolution requests, for clients that have no cross-object fixups.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H
#define LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H

#include "llvm/ExecutionEngine/Orc/Core.h"
#include "llvm/ExecutionEngine/RuntimeDyld.h"

namespace llvm {
namespace orc {

class NullResolver : public SymbolResolver {
public:
  SymbolNameSet lookupFlags(SymbolFlagsMap &Flags,
                            const SymbolNameSet &Symbols) override;

  SymbolNameSet lookup(std::shared_ptr<AsynchronousSymbolQuery> Query,
                       SymbolNameSet Symbols) override;
};

/// SymbolResolver impliementation that rejects all resolution requests.
/// Useful for clients that have no cross-object fixups.
class NullLegacyResolver : public LegacyJITSymbolResolver {
public:
  JITSymbol findSymbol(const std::string &Name) final;

  JITSymbol findSymbolInLogicalDylib(const std::string &Name) final;
};

} // End namespace orc.
} // End namespace llvm.

#endif // LLVM_EXECUTIONENGINE_ORC_NULLRESOLVER_H