dynamic_library_lin.cpp

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#include "dynamic_library.h"

#include <opc/common/addons_core/errors.h>

#include <dlfcn.h>

namespace
{

void * LoadLibrary(const char * path)
{
  void * library = dlopen(path, RTLD_LAZY);

  if (!library)
    {
      std::string msg;

      if (const char * err = dlerror())
        {
          msg = err;
        }

      THROW_ERROR2(UnableToLoadDynamicLibrary, path, msg);
    }

  return library;
}

}

namespace Common
{

DynamicLibrary::DynamicLibrary(const std::string & libraryPath)
  : Path(libraryPath)
  , Library(0)
{
}

DynamicLibrary::~DynamicLibrary()
{
  if (Library)
    {
      //dlclose(Library);
    }
}

void * DynamicLibrary::FindSymbol(const std::string & funcName)
{
  if (!Library)
    {
      Library = LoadLibrary(Path.c_str());
    }

  void * func = dlsym(Library, funcName.c_str());

  if (!func)
    {
      std::string msg;

      if (const char * err = dlerror())
        {
          msg = err;
        }

      THROW_ERROR3(UnableToFundSymbolInTheLibrary, funcName, Path, msg);
    }

  return func;
}

}