src/os/unix/library_loader_unix.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file library_loader_unix.cpp Implementation of the LibraryLoader for Linux / MacOS */
   9
  10 #include "../../stdafx.h"
  11
  12 #include <dlfcn.h>
  13
  14 #include "../../library_loader.h"
  15
  16 #include "../../safeguards.h"
  17
  18 /* Emscripten cannot dynamically load other files. */
  19 #if defined(__EMSCRIPTEN__)
  20
  21 void *LibraryLoader::OpenLibrary(const std::string &)
  22 {
  23         this->error = "Dynamic loading is not supported on this platform.";
  24         return nullptr;
  25 }
  26
  27 void LibraryLoader::CloseLibrary()
  28 {
  29 }
  30
  31 void *LibraryLoader::GetSymbol(const std::string &)
  32 {
  33         this->error = "Dynamic loading is not supported on this platform.";
  34         return nullptr;
  35 }
  36
  37 #else
  38
  39 void *LibraryLoader::OpenLibrary(const std::string &filename)
  40 {
  41         void *h = dlopen(filename.c_str(), RTLD_NOW | RTLD_LOCAL);
  42         if (h == nullptr) {
  43                 this->error = dlerror();
  44         }
  45
  46         return h;
  47 }
  48
  49 void LibraryLoader::CloseLibrary()
  50 {
  51         dlclose(this->handle);
  52 }
  53
  54 void *LibraryLoader::GetSymbol(const std::string &symbol_name)
  55 {
  56         void *p = dlsym(this->handle, symbol_name.c_str());
  57         if (p == nullptr) {
  58                 this->error = dlerror();
  59         }
  60
  61         return p;
  62 }
  63
  64 #endif /* __EMSCRIPTEN__ */