library_loader_unix.cpp

Go to the documentation of this file.

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "../../stdafx.h"
 
#include <dlfcn.h>
 
#include "../../library_loader.h"
 
#include "../../safeguards.h"
 
/* Emscripten cannot dynamically load other files. */
#if defined(__EMSCRIPTEN__)
 
void *LibraryLoader::OpenLibrary(const std::string &)
{
  this->error = "Dynamic loading is not supported on this platform.";
  return nullptr;
}
 
void LibraryLoader::CloseLibrary()
{
}
 
void *LibraryLoader::GetSymbol(const std::string &)
{
  this->error = "Dynamic loading is not supported on this platform.";
  return nullptr;
}
 
#else
 
void *LibraryLoader::OpenLibrary(const std::string &filename)
{
  void *h = dlopen(filename.c_str(), RTLD_NOW | RTLD_LOCAL);
  if (h == nullptr) {
    this->error = dlerror();
  }
 
  return h;
}
 
void LibraryLoader::CloseLibrary()
{
  dlclose(this->handle);
}
 
void *LibraryLoader::GetSymbol(const std::string &symbol_name)
{
  void *p = dlsym(this->handle, symbol_name.c_str());
  if (p == nullptr) {
    this->error = dlerror();
  }
 
  return p;
}
 
#endif /* __EMSCRIPTEN__ */