SharedLibrary.hpp

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/*
 * Copyright (c) 2011-2021, The DART development contributors
 * All rights reserved.
 *
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 *   without modification, are permitted provided that the following
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 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
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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_