class_loader.h

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#ifndef TESSERACT_COMMON_CLASS_LOADER_H
#define TESSERACT_COMMON_CLASS_LOADER_H
 
#include <tesseract_common/macros.h>
TESSERACT_COMMON_IGNORE_WARNINGS_PUSH
#include <memory>
#include <string>
#include <vector>
TESSERACT_COMMON_IGNORE_WARNINGS_POP
 
namespace tesseract_common
{
struct ClassLoader
{
  template <class ClassBase>
  static std::shared_ptr<ClassBase> createSharedInstance(const std::string& symbol_name,
                                                         const std::string& library_name,
                                                         const std::string& library_directory = "");
 
  static inline bool isClassAvailable(const std::string& symbol_name,
                                      const std::string& library_name,
                                      const std::string& library_directory = "");
 
  static inline std::vector<std::string> getAvailableSymbols(const std::string& section,
                                                             const std::string& library_name,
                                                             const std::string& library_directory = "");
 
  static inline std::vector<std::string> getAvailableSections(const std::string& library_name,
                                                              const std::string& library_directory = "",
                                                              bool include_hidden = false);
 
  static inline std::string decorate(const std::string& library_name, const std::string& library_directory = "");
};
}  // namespace tesseract_common
 
// clang-format off
#define TESSERACT_ADD_PLUGIN_SECTIONED(DERIVED_CLASS, ALIAS, SECTION)                                                  \
  extern "C" BOOST_SYMBOL_EXPORT DERIVED_CLASS ALIAS;                                                                  \
  BOOST_DLL_SECTION(SECTION, read) BOOST_DLL_SELECTANY                                                                 \
  DERIVED_CLASS ALIAS;
 
#define TESSERACT_ADD_PLUGIN(DERIVED_CLASS, ALIAS)                                                                     \
  TESSERACT_ADD_PLUGIN_SECTIONED(DERIVED_CLASS, ALIAS, boostdll)
 
#define TESSERACT_PLUGIN_ANCHOR_DECL(ANCHOR_NAME) \
  const void* ANCHOR_NAME(); // NOLINT
 
#define TESSERACT_PLUGIN_ANCHOR_IMPL(ANCHOR_NAME) \
  const void* ANCHOR_NAME() { return (const void*)(&ANCHOR_NAME); } // NOLINT
 
// clang-format on
 
#include <tesseract_common/class_loader.hpp>
 
#endif  // TESSERACT_COMMON_CLASS_LOADER_H