//===--------------- SimpleExecutorDylibManager.h ---------------*- 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
//
//===----------------------------------------------------------------------===//
//
// A simple dynamic library management class. Allows dynamic libraries to be
// loaded and searched.
//
// FIXME: The functionality in this file should be moved to the ORC runtime.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H
#define LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H

#include "llvm/ADT/DenseSet.h"
#include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
#include "llvm/ExecutionEngine/Orc/Shared/ExecutorSymbolDef.h"
#include "llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h"
#include "llvm/ExecutionEngine/Orc/Shared/TargetProcessControlTypes.h"
#include "llvm/ExecutionEngine/Orc/Shared/WrapperFunctionUtils.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/ExecutorBootstrapService.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/ExecutorResolver.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/Error.h"

#include <mutex>

namespace llvm {
namespace orc {
namespace rt_bootstrap {

/// Simple page-based allocator.
class LLVM_ABI SimpleExecutorDylibManager : public ExecutorBootstrapService {
public:
  ~SimpleExecutorDylibManager() override;

  Expected<tpctypes::DylibHandle> open(const std::string &Path, uint64_t Mode);

  Error shutdown() override;
  void addBootstrapSymbols(StringMap<ExecutorAddr> &M) override;

private:
  using DylibSet = DenseSet<void *>;

  static llvm::orc::shared::CWrapperFunctionBuffer
  openWrapper(const char *ArgData, size_t ArgSize);

  static llvm::orc::shared::CWrapperFunctionBuffer
  resolveWrapper(const char *ArgData, size_t ArgSize);

  std::mutex M;
  DylibSet Dylibs;
  std::vector<std::unique_ptr<ExecutorResolver>> Resolvers;
};

} // end namespace rt_bootstrap
} // end namespace orc
} // end namespace llvm

#endif // LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H