C++ ACE_DLL::close方法代码示例

int
run_main (int, ACE_TCHAR *[])
{
  ACE_START_TEST (ACE_TEXT ("DLL_Test"));

  int retval = 0;

// Protection against this test being run on platforms not supporting Dlls.
#if defined(ACE_HAS_DYNAMIC_LINKING)

  ACE_DLL dll;

  retval += basic_test (dll);

  retval += dynamic_cast_test (dll);

  retval += handle_test (dll);

  // Call close here so that any errors make it into the log.
  dll.close ();

#else
  ACE_ERROR ((LM_INFO,
              ACE_TEXT ("Dynamically Linkable Libraries not supported on this platform\n")));
#endif /* ACE_HAS_DYNAMIC_LINKING */

  ACE_END_TEST;
  return retval == 0 ? 0 : 1;
}

int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
  ACE_UNUSED_ARG (argc);
  ACE_UNUSED_ARG (argv);

  ACE_DLL dll;

  int retval = dll.open (ACE_DLL_PREFIX ACE_TEXT("DLL_Today"));

  if (retval != 0)
    ACE_ERROR_RETURN ((LM_ERROR,
                       "%p",
                       "dll.open"),
                      -1);
  Magazine_Creator mc;

  // Cast the void* to non-pointer type first - it's not legal to
  // cast a pointer-to-object directly to a pointer-to-function.
  void *void_ptr = dll.symbol (ACE_TEXT ("create_magazine"));
  ptrdiff_t tmp = reinterpret_cast<ptrdiff_t> (void_ptr);
  mc = reinterpret_cast<Magazine_Creator> (tmp);

  if (mc == 0)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "%p",
                         "dll.symbol"),
                        -1);
    }

  {
    auto_ptr <Magazine> magazine (mc ());

    magazine->title ();
  }

  dll.close ();

  // The other library is now loaded on demand.

  retval = dll.open (ACE_DLL_PREFIX ACE_TEXT ("DLL_Newsweek"));

  if (retval != 0)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "%p",
                         "dll.open"),
                        -1);
    }

  // Cast the void* to non-pointer type first - it's not legal to
  // cast a pointer-to-object directly to a pointer-to-function.
  void_ptr = dll.symbol (ACE_TEXT ("create_magazine"));
  tmp = reinterpret_cast<ptrdiff_t> (void_ptr);
  mc = reinterpret_cast<Magazine_Creator> (tmp);

  if (mc == 0)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "%p",
                         "dll.symbol"),
                        -1);
    }

  {
    auto_ptr <Magazine> magazine (mc ());

    magazine->title ();
  }

  dll.close ();

  return 0;
}

// Check that the ACE_Based_Pointer_Repository can be accessed
// from a Windows DLL
// (see http://bugzilla.dre.vanderbilt.edu/show_bug.cgi?id=1991)
int singleton_test (void)
{
    void* baddr1 = ACE_BASED_POINTER_REPOSITORY::instance();
    void* baddr2 = ACE_BASED_POINTER_REPOSITORY::instance();

    if (baddr1 != baddr2)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         ACE_TEXT ("ACE_Based_Pointer_Repository is not a singleton\n")),
                        -1);
    }

// Protection against this test being run on platforms not supporting Dlls.
#if defined(ACE_HAS_DYNAMIC_LINKING)

    ACE_TString dll_file;
    const char *subdir_env = ACE_OS::getenv ("ACE_EXE_SUB_DIR");
    if (subdir_env)
      {
        dll_file = ACE_TEXT_CHAR_TO_TCHAR (subdir_env);
        dll_file += ACE_DIRECTORY_SEPARATOR_STR;
      }

    dll_file += OBJ_PREFIX ACE_TEXT ("Based_Pointer_Test_Lib") OBJ_SUFFIX;

    // If DLL causes multiple instances of singleton
    // then the ACE_Cleanup object registered
    // with the ACE_Object_manager will no longer be valid,
    // at exit time if the library is unloaded. Override
    // the default close on destruct.
    ACE_DLL dll;
    int retval = dll.open (dll_file.c_str (),
                           ACE_DEFAULT_SHLIB_MODE,
                           0);

    if (retval != 0)
       {
       ACE_TCHAR *dll_error = dll.error ();
       ACE_ERROR_RETURN ((LM_ERROR,
                           ACE_TEXT ("Error in DLL Open: %s\n"),
                           dll_error ? dll_error : ACE_TEXT ("unknown error")),
                           -1);
       }

#if defined (ACE_OPENVMS)
    // with OPENVMS symbol names > 31 cause us trouble with dlsym()
    void* foo = dll.symbol (ACE_TEXT ("get_based_pointer_repo_inst"));
#else
    void* foo = dll.symbol (ACE_TEXT ("get_based_pointer_repository_instance"));
#endif

    // Cast the void* to function* with a long as intermediate.
    ptrdiff_t tmp = reinterpret_cast<ptrdiff_t> (foo);
    Get_Bp_Repository_Inst get_bp_repository_inst =
       reinterpret_cast<Get_Bp_Repository_Inst> (tmp);
    if (get_bp_repository_inst == 0)
       ACE_ERROR_RETURN ((LM_ERROR,
                          ACE_TEXT ("%p\n"),
                          dll.error ()),
                         -1);

    void* baddr_dll = get_bp_repository_inst ();

    dll.close ();

    if (baddr_dll != baddr1)
      {
        ACE_ERROR_RETURN ((LM_ERROR,
                           ACE_TEXT ("ACE_Based_Pointer_Repository is not a ")
                           ACE_TEXT ("singleton in DLL <%@> <%@>\n"),
                           baddr_dll,
                           baddr1),
                          -1);
      }
#endif /* ACE_HAS_DYNAMIC_LINKING */

    return 0;
}