C++ service_ptr_t::is_valid方法代码示例

void seekabilizer::g_seekabilize(service_ptr_t<file> & p_reader,t_size p_buffer_size,abort_callback & p_abort) {
	if (p_reader.is_valid() && p_reader->is_remote() && p_buffer_size > 0) {
		service_ptr_t<seekabilizer> instance = new service_impl_t<seekabilizer>();
		instance->initialize(p_reader,p_buffer_size,p_abort);
		p_reader = instance.get_ptr();
	}
}

static void prepare_for_open(service_ptr_t<input_entry> & p_service,service_ptr_t<file> & p_file,const char * p_path,filesystem::t_open_mode p_open_mode,abort_callback & p_abort,bool p_from_redirect)
{
	if (p_file.is_empty())
	{
		service_ptr_t<filesystem> fs;
		if (filesystem::g_get_interface(fs,p_path)) {
			if (fs->supports_content_types()) {
				fs->open(p_file,p_path,p_open_mode,p_abort);
			}
		}
	}

	if (p_file.is_valid())
	{
		pfc::string8 content_type;
		if (p_file->get_content_type(content_type))
		{
			if (input_entry::g_find_service_by_content_type(p_service,content_type))
				return;
		}
	}

	if (input_entry::g_find_service_by_path(p_service,p_path))
	{
		if (p_from_redirect && p_service->is_redirect()) throw exception_io_unsupported_format();
		return;
	}

	throw exception_io_unsupported_format();
}

bool dsp_rate_entry::instantiate(service_ptr_t<dsp>& p_out, const dsp_preset& p_preset)
{
	bool ret = false;
	if (p_preset.get_owner() == get_guid())
	{
		t_dsp_rate_params params;
		params.set_data(p_preset);
		p_out = reinterpret_cast<dsp*>(new service_impl_t<dsp_rate>(params));
		ret = p_out.is_valid();
	}
	return ret;
}

static void process_fullbuffer(service_ptr_t<file> & p_file,const char * p_path,t_filesize p_fullbuffer,abort_callback & p_abort) {
	if (p_fullbuffer > 0) {
		if (p_file.is_empty()) {
			service_ptr_t<filesystem> fs;
			if (filesystem::g_get_interface(fs,p_path)) {
				fs->open(p_file,p_path,filesystem::open_mode_read,p_abort);
			}
		}

		if (p_file.is_valid()) {
			t_filesize size = p_file->get_size(p_abort);
			if (size != filesize_invalid && size <= p_fullbuffer) {
				service_ptr_t<file> l_file_buffered;
				if (reader_membuffer_mirror::g_create(l_file_buffered,p_file,p_abort)) {
					p_file = l_file_buffered;
				}
			}
		}
	}
}

//.........这里部分代码省略.........
				BOOL a = true;
				SystemParametersInfo(SPI_GETKEYBOARDCUES, 0, &a, 0);
				if ((SendMessage(wnd_menu, WM_QUERYUISTATE, 0, 0) & UISF_HIDEACCEL) != !a)
					SendMessage(wnd_menu, WM_UPDATEUISTATE, MAKEWPARAM(a ? UIS_CLEAR : UIS_SET, UISF_HIDEACCEL), 0);
			}
			break;
		}
		case MSG_SHOW_MENUACC:
		{
			//if (is_win2k_or_newer())
			{
				SendMessage(wnd_menu, WM_UPDATEUISTATE, MAKEWPARAM(UIS_CLEAR, UISF_HIDEACCEL), 0);
			}
			break;
		}
		case MSG_CREATE_MENU:
		{
			if (lp) SetFocus(wnd_menu);
			active_item = wp;

			make_menu(wp);
			break;
		}
		case WM_MENUSELECT:
		{
			if (HIWORD(wp) & MF_POPUP)
			{
				is_submenu = true;
				m_status_override.release();
			}
			else
			{
				is_submenu = false;
				if (p_manager.is_valid())
				{
					unsigned id = LOWORD(wp);

					bool set = false;

					pfc::string8 blah;

					set = p_manager->get_description(id - 1, blah);

					service_ptr_t<ui_status_text_override> p_status_override;

					if (set)
					{
						get_host()->override_status_text_create(p_status_override);

						if (p_status_override.is_valid())
						{
							p_status_override->override_text(blah);
						}
					}
					m_status_override = p_status_override;
				}
			}
			break;
		}
		case WM_INITMENUPOPUP:
		{
			sub_menu_ref_count++;
			break;
		}
		case WM_UNINITMENUPOPUP:
		{

static void process_path_internal(const char * p_path,const service_ptr_t<file> & p_reader,playlist_loader_callback_v2 & p_callback,playlist_loader_callback::t_entry_type p_type,const t_filestats & p_stats)
{
	//p_path must be canonical

	p_callback.check();

	p_callback.on_progress(p_path);

	
	{
		if (p_reader.is_empty()) {
			directory_callback_impl directory_results(true);
			try {
				filesystem::g_list_directory(p_path,directory_results,p_callback);
				for(t_size n=0;n<directory_results.get_count();n++) {
					process_path_internal(directory_results.get_item(n),0,p_callback,playlist_loader_callback::entry_directory_enumerated,directory_results.get_item_stats(n));
				}
				return;
			} catch(exception_aborted) {throw;}
			catch(...) {
				//do nothing, fall thru
				//fixme - catch only filesystem exceptions?
			}
		}

		bool found = false;


		{
			archive_callback_impl archive_results(p_callback);
			service_enum_t<filesystem> e;
			service_ptr_t<filesystem> f;
			while(e.next(f)) {
				p_callback.check();
				service_ptr_t<archive> arch;
				if (f->service_query_t(arch)) {
					if (p_reader.is_valid()) p_reader->reopen(p_callback);

					try {
						TRACK_CODE("archive::archive_list",arch->archive_list(p_path,p_reader,archive_results,true));
						return;
					} catch(exception_aborted) {throw;} 
					catch(...) {}
				}
			} 
		}
	}

	

	{
		service_ptr_t<link_resolver> ptr;
		if (link_resolver::g_find(ptr,p_path))
		{
			if (p_reader.is_valid()) p_reader->reopen(p_callback);

			pfc::string8 temp;
			try {
				TRACK_CODE("link_resolver::resolve",ptr->resolve(p_reader,p_path,temp,p_callback));

				track_indexer__g_get_tracks_wrap(temp,0,filestats_invalid,playlist_loader_callback::entry_from_playlist,p_callback);
				return;//success
			} catch(exception_aborted) {throw;}
			catch(...) {}
		}
	}

	if (p_callback.is_path_wanted(p_path,p_type)) {
		track_indexer__g_get_tracks_wrap(p_path,p_reader,p_stats,p_type,p_callback);
	}
}

void playlist_view::g_get_global_style_titleformat_object(service_ptr_t<titleformat_object> & p_out)
{
	if (!g_to_global_colour.is_valid()) 
		static_api_ptr_t<titleformat_compiler>()->compile_safe(g_to_global_colour, cfg_colour);
	p_out = g_to_global_colour;
}