SharedLibrary.hpp

/*
 * Copyright (c) 2011-2021, The DART development contributors
 * All rights reserved.
 *
 * The list of contributors can be found at:
 *   https://github.com/dartsim/dart/blob/master/LICENSE
 *
 * This file is provided under the following "BSD-style" License:
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 *   without modification, are permitted provided that the following
 *   conditions are met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
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 */

#ifndef DART_COMMON_SHAREDLIBRARY_HPP_
#define DART_COMMON_SHAREDLIBRARY_HPP_

#include <memory>
#include <string>

#include <boost/filesystem.hpp>

#include "dart/common/Deprecated.hpp"
#include "dart/common/Platform.hpp"

#if DART_OS_LINUX

#  define DYNLIB_HANDLE void*

#elif DART_OS_MACOS

#  define DYNLIB_HANDLE void*

#elif DART_OS_WINDOWS

#  ifdef NOMINMAX
#    include <windows.h>
#  else
#    define NOMINMAX
#    include <windows.h>
#    undef NOMINMAX
#  endif
using hInstance = HINSTANCE__*;
#  define DYNLIB_HANDLE hInstance

#endif

#if DART_OS_LINUX
static constexpr const char* DART_SHARED_LIB_EXTENSION = "so";
#elif DART_OS_MACOS
static constexpr const char* DART_SHARED_LIB_EXTENSION = "dylib";
#elif DART_OS_WINDOWS
static constexpr const char* DART_SHARED_LIB_EXTENSION = "dll";
#else
#  error Unhandled platform
#endif

#if DART_OS_LINUX
static constexpr const char* DART_SHARED_LIB_PREFIX = "lib";
#elif DART_OS_MACOS
static constexpr const char* DART_SHARED_LIB_PREFIX = "lib";
#elif DART_OS_WINDOWS
static constexpr const char* DART_SHARED_LIB_PREFIX = "";
#else
#  error Unhandled platform
#endif

namespace dart {
namespace common {

namespace detail {
class SharedLibraryManager;
} // namespace detail

class SharedLibrary
{
protected:
  enum ProtectedConstructionTag
  {
    ProtectedConstruction
  };

public:
  DART_DEPRECATED(6.10)
  static std::shared_ptr<SharedLibrary> create(
      const boost::filesystem::path& path);

  static std::shared_ptr<SharedLibrary> create(const std::string& path);

  DART_DEPRECATED(6.10)
  explicit SharedLibrary(
      ProtectedConstructionTag, const boost::filesystem::path& path);

  explicit SharedLibrary(ProtectedConstructionTag, const std::string& path);

  virtual ~SharedLibrary();

  const boost::filesystem::path& getCanonicalPath() const;

  const std::string& path() const;

  bool isValid() const;

  void* getSymbol(const std::string& symbolName) const;

protected:
  friend class detail::SharedLibraryManager;

  boost::filesystem::path mCanonicalPath;
  // TODO(JS): Remove in DART 7.

  std::string mPath;

  DYNLIB_HANDLE mInstance;

private:
  std::string getLastError() const;
};

} // namespace common
} // namespace dart

#endif // DART_COMMON_SHAREDLIBRARY_HPP_