LambdaResolver.h revision 360784 
1//===- LambdaResolverMM - Redirect symbol lookup via a functor --*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9//   Defines a RuntimeDyld::SymbolResolver subclass that uses a user-supplied
10// functor for symbol resolution.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_EXECUTIONENGINE_ORC_LAMBDARESOLVER_H
15#define LLVM_EXECUTIONENGINE_ORC_LAMBDARESOLVER_H
16
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ExecutionEngine/JITSymbol.h"
19#include "llvm/ExecutionEngine/OrcV1Deprecation.h"
20#include <memory>
21
22namespace llvm {
23namespace orc {
24
25template <typename DylibLookupFtorT, typename ExternalLookupFtorT>
26class LambdaResolver : public LegacyJITSymbolResolver {
27public:
28  LLVM_ATTRIBUTE_DEPRECATED(
29      LambdaResolver(DylibLookupFtorT DylibLookupFtor,
30                     ExternalLookupFtorT ExternalLookupFtor),
31      "ORCv1 utilities (including resolvers) are deprecated and will be "
32      "removed "
33      "in the next release. Please use ORCv2 (see docs/ORCv2.rst)");
34
35  LambdaResolver(ORCv1DeprecationAcknowledgement,
36                 DylibLookupFtorT DylibLookupFtor,
37                 ExternalLookupFtorT ExternalLookupFtor)
38      : DylibLookupFtor(DylibLookupFtor),
39        ExternalLookupFtor(ExternalLookupFtor) {}
40
41  JITSymbol findSymbolInLogicalDylib(const std::string &Name) final {
42    return DylibLookupFtor(Name);
43  }
44
45  JITSymbol findSymbol(const std::string &Name) final {
46    return ExternalLookupFtor(Name);
47  }
48
49private:
50  DylibLookupFtorT DylibLookupFtor;
51  ExternalLookupFtorT ExternalLookupFtor;
52};
53
54template <typename DylibLookupFtorT, typename ExternalLookupFtorT>
55LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>::LambdaResolver(
56    DylibLookupFtorT DylibLookupFtor, ExternalLookupFtorT ExternalLookupFtor)
57    : DylibLookupFtor(DylibLookupFtor), ExternalLookupFtor(ExternalLookupFtor) {
58}
59
60template <typename DylibLookupFtorT,
61          typename ExternalLookupFtorT>
62std::shared_ptr<LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>>
63createLambdaResolver(DylibLookupFtorT DylibLookupFtor,
64                     ExternalLookupFtorT ExternalLookupFtor) {
65  using LR = LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>;
66  return std::make_unique<LR>(std::move(DylibLookupFtor),
67                         std::move(ExternalLookupFtor));
68}
69
70template <typename DylibLookupFtorT, typename ExternalLookupFtorT>
71std::shared_ptr<LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>>
72createLambdaResolver(ORCv1DeprecationAcknowledgement,
73                     DylibLookupFtorT DylibLookupFtor,
74                     ExternalLookupFtorT ExternalLookupFtor) {
75  using LR = LambdaResolver<DylibLookupFtorT, ExternalLookupFtorT>;
76  return std::make_unique<LR>(AcknowledgeORCv1Deprecation,
77                         std::move(DylibLookupFtor),
78                         std::move(ExternalLookupFtor));
79}
80
81} // end namespace orc
82} // end namespace llvm
83
84#endif // LLVM_EXECUTIONENGINE_ORC_LAMBDARESOLVER_H
85