text: /* Platform independent shared object routines for GDB.
  
     Copyright (C) 2011-2016 Free Software Foundation, Inc.
  
     This file is part of GDB.
  
     This program 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; either version 3 of the License, or
     (at your option) any later version.
  
     This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include "defs.h"
  #include "gdb-dlfcn.h"
  
  #ifdef HAVE_DLFCN_H
  #include <dlfcn.h>
  #elif __MINGW32__
  #include <windows.h>
  #else
  /* Unsupported configuration. */
  #define NO_SHARED_LIB
  #endif
  
  #ifdef NO_SHARED_LIB
  
  void *
  gdb_dlopen (const char *filename)
  {
    gdb_assert_not_reached ("gdb_dlopen should not be called on this platform.");
  }
  
  void *
  gdb_dlsym (void *handle, const char *symbol)
  {
    gdb_assert_not_reached ("gdb_dlsym should not be called on this platform.");
  }
  
  struct cleanup *
  make_cleanup_dlclose (void *handle)
  {
    gdb_assert_not_reached ("make_cleanup_dlclose should not be called on this "
                            "platform.");
  }
  
  int
  gdb_dlclose (void *handle)
  {
    gdb_assert_not_reached ("gdb_dlclose should not be called on this platform.");
  }
  
  int
  is_dl_available (void)
  {
    return 0;
  }
  
  #else /* NO_SHARED_LIB */
  
  void *
  gdb_dlopen (const char *filename)
  {
    void *result;
  #ifdef HAVE_DLFCN_H
    result = dlopen (filename, RTLD_NOW);
  #elif __MINGW32__
    result = (void *) LoadLibrary (filename);
  #endif
    if (result != NULL)
      return result;
  
  #ifdef HAVE_DLFCN_H
    error (_("Could not load %s: %s"), filename, dlerror());
  #else
    {
      LPVOID buffer;
      DWORD dw;
  
      dw = GetLastError();
  
      FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
                     FORMAT_MESSAGE_IGNORE_INSERTS,
                     NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                     (LPTSTR) &buffer,
                     0, NULL);
  
      error (_("Could not load %s: %s"), filename, (char *) buffer);
    }
  #endif
  }
  
  void *
  gdb_dlsym (void *handle, const char *symbol)
  {
  #ifdef HAVE_DLFCN_H
    return dlsym (handle, symbol);
  #elif __MINGW32__
    return (void *) GetProcAddress ((HMODULE) handle, symbol);
  #endif
  }
  
  int
  gdb_dlclose (void *handle)
  {
  #ifdef HAVE_DLFCN_H
    return dlclose (handle);
  #elif __MINGW32__
    return !((int) FreeLibrary ((HMODULE) handle));
  #endif
  }
  
  static void
  do_dlclose_cleanup (void *handle)
  {
    gdb_dlclose (handle);
  }
  
  struct cleanup *
  make_cleanup_dlclose (void *handle)
  {
    return make_cleanup (do_dlclose_cleanup, handle);
  }
  
  int
  is_dl_available (void)
  {
    return 1;
  }
  
  #endif /* NO_SHARED_LIB */
  