示例#1
0
static void
a_xcb_check_cb(EV_P_ ev_check *w, int revents)
{
    xcb_generic_event_t *mouse = NULL, *event;

    while((event = xcb_poll_for_event(globalconf.connection)))
    {
        /* We will treat mouse events later.
         * We cannot afford to treat all mouse motion events,
         * because that would be too much CPU intensive, so we just
         * take the last we get after a bunch of events. */
        if(XCB_EVENT_RESPONSE_TYPE(event) == XCB_MOTION_NOTIFY)
        {
            p_delete(&mouse);
            mouse = event;
        }
        else
        {
            event_handle(event);
            p_delete(&event);
        }
    }

    if(mouse)
    {
        event_handle(mouse);
        p_delete(&mouse);
    }
}
示例#2
0
void
event_maprequest(XMapRequestEvent *ev) {
	Window *w;

	if((w = findwin(ev->parent)))
		event_handle(w, mapreq, ev);
}
示例#3
0
void
event_motionnotify(XMotionEvent *ev) {
	Window *w;

	if(!ev->send_event)
		event_xtime = ev->time;
	if((w = findwin(ev->window)))
		event_handle(w, motion, ev);
}
示例#4
0
void
event_selectionrequest(XSelectionRequestEvent *ev) {
	Window *w;

	if(!ev->send_event)
		event_xtime = ev->time;
	if((w = findwin(ev->owner)))
		event_handle(w, selectionrequest, ev);
}
示例#5
0
void
event_leavenotify(XCrossingEvent *ev) {
	Window *w;

	if(!ev->send_event)
		event_xtime = ev->time;
	if((w = findwin(ev->window)))
		event_handle(w, leave, ev);
}
示例#6
0
 static inline Handle<UserEvent> create(int init_value, bool non_block, bool semaphore)
 {
   int flag = EFD_CLOEXEC;
   if (non_block) flag |= EFD_NONBLOCK;
   if (semaphore) flag |= EFD_SEMAPHORE;
   Handle<UserEvent> event_handle(::eventfd(init_value, flag));
   if (!event_handle)
     throw std::system_error(util::errc(), "ops::UserEvent::create");
   return std::move(event_handle);
 }
示例#7
0
void run_simulation(double end_time)
{
    struct Event *e;

    // Main scheduler loop
	while ((e=remove_event()) != NULL) {
		now_time = e->timestamp;
        if (now_time > end_time) break;
		event_handle(e);
	}
}
示例#8
0
void
event_enternotify(XCrossingEvent *ev) {
	Window *w;

	if(!ev->send_event)
		event_xtime = ev->time;
	if(ev->mode != NotifyNormal)
		return;

	if((w = findwin(ev->window)))
		event_handle(w, enter, ev);
}
示例#9
0
int main(int argc, char **argv)
{
    SDL_Event *event = av_mallocz(sizeof(SDL_Event));
    Content *content = av_mallocz(sizeof(Content));
    Media *video = av_mallocz(sizeof(Media));
    Media *audio = av_mallocz(sizeof(Media));
    State *state = av_mallocz(sizeof(State));
    SDL_Thread *video_decode_tid1;
    SDL_Thread *video_decode_tid2;
    SDL_Thread *read_pkt_tid;
    SDL_Thread *refresh_tid;
//    InitPool(2);
    state->content = content;
    state->video = video;
    state->audio = audio;
    init_video(video);
    if(argc < 2) {
	LOGE("Usage : play <content>");
	exit(1);
    }
    av_register_all();
    if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
	LOGE("fail to initialize SDL");
	exit(1);
    }
    av_strlcpy(content->name, argv[1], sizeof(content->name));
    LOGE("addr : %x", video->frame_buf);
    get_content_info(content);
    LOGI("finding streams");
    find_av_streams(content, video, audio);
    LOGI("finding decoder");
    find_decoder(video);
    video->get_info(video);
    LOGI("creating reading thread...");
    read_pkt_tid = SDL_CreateThread(queue_av_pkt, "read", state);
    LOGI("initing screen");
    init_screen(video);
//    LOGI("alloc frame");
    alloc_frame(video);
    LOGI("alloc all the frame");
//    alloc_all_frame(video);
    LOGI("creating decode thread1...");
    video_decode_tid1 = SDL_CreateThread(decode_video, "decode1", video);    
    refresh(state, 50);
    event_handle(event);
    return 0;
}
示例#10
0
void core_loop(void) {

    SDL_Event event;
    while (! app.exit) {
        while (SDL_PollEvent(&event)) {
            event_handle(&event);
        }

        if (! timer.paused) {
            process_update();
            view_update();
        }
        view_render();

        timer_step();
    }
}
void rpc_evt_handler(rpc_transport_evt_type_t pkt_type)
{
    if (pkt_type != RPC_TRANSPORT_EVT_READY)
    {
        // Unwanted packet received. This should never happen.
        return;
    }

    uint8_t   event[MAX_EVENT_LEN];
    uint32_t  rcvd_evt_size = 0;
    uint32_t  err_code;

    err_code = rpc_transport_packet_read(RPC_TRANSPORT_EVT, sizeof(event), event, &rcvd_evt_size);

    if (err_code != NRF_SUCCESS)
    {
        // Nothing other than assertion can be done.
        ASSERT(false);
    }

    event_handle(event, rcvd_evt_size);
}
示例#12
0
/** Hello, this is main.
 * \param argc Who knows.
 * \param argv Who knows.
 * \return EXIT_SUCCESS I hope.
 */
int
main(int argc, char **argv)
{
    char *confpath = NULL;
    int xfd, i, screen_nbr, opt, colors_nbr;
    xcolor_init_request_t colors_reqs[2];
    ssize_t cmdlen = 1;
    xdgHandle xdg;
    xcb_generic_event_t *event;
    static struct option long_options[] =
    {
        { "help",    0, NULL, 'h' },
        { "version", 0, NULL, 'v' },
        { "config",  1, NULL, 'c' },
        { "check",   0, NULL, 'k' },
        { NULL,      0, NULL, 0 }
    };

    /* event loop watchers */
    ev_io xio    = { .fd = -1 };
    ev_check xcheck;
    ev_prepare a_refresh;
    ev_signal sigint;
    ev_signal sigterm;
    ev_signal sighup;

    /* clear the globalconf structure */
    p_clear(&globalconf, 1);
    globalconf.keygrabber = LUA_REFNIL;
    globalconf.mousegrabber = LUA_REFNIL;
    buffer_init(&globalconf.startup_errors);

    /* save argv */
    for(i = 0; i < argc; i++)
        cmdlen += a_strlen(argv[i]) + 1;

    globalconf.argv = p_new(char, cmdlen);
    a_strcpy(globalconf.argv, cmdlen, argv[0]);

    for(i = 1; i < argc; i++)
    {
        a_strcat(globalconf.argv, cmdlen, " ");
        a_strcat(globalconf.argv, cmdlen, argv[i]);
    }

    /* Text won't be printed correctly otherwise */
    setlocale(LC_CTYPE, "");

    /* Get XDG basedir data */
    xdgInitHandle(&xdg);

    /* init lua */
    luaA_init(&xdg);

    /* check args */
    while((opt = getopt_long(argc, argv, "vhkc:",
                             long_options, NULL)) != -1)
        switch(opt)
        {
          case 'v':
            eprint_version();
            break;
          case 'h':
            exit_help(EXIT_SUCCESS);
            break;
          case 'k':
            if(!luaA_parserc(&xdg, confpath, false))
            {
                fprintf(stderr, "✘ Configuration file syntax error.\n");
                return EXIT_FAILURE;
            }
            else
            {
                fprintf(stderr, "✔ Configuration file syntax OK.\n");
                return EXIT_SUCCESS;
            }
          case 'c':
            if(a_strlen(optarg))
                confpath = a_strdup(optarg);
            else
                fatal("-c option requires a file name");
            break;
        }

    globalconf.loop = ev_default_loop(0);
    ev_timer_init(&globalconf.timer, &luaA_on_timer, 0., 0.);

    /* register function for signals */
    ev_signal_init(&sigint, exit_on_signal, SIGINT);
    ev_signal_init(&sigterm, exit_on_signal, SIGTERM);
    ev_signal_init(&sighup, restart_on_signal, SIGHUP);
    ev_signal_start(globalconf.loop, &sigint);
    ev_signal_start(globalconf.loop, &sigterm);
    ev_signal_start(globalconf.loop, &sighup);
    ev_unref(globalconf.loop);
    ev_unref(globalconf.loop);
    ev_unref(globalconf.loop);

    struct sigaction sa = { .sa_handler = signal_fatal, .sa_flags = 0 };
    sigemptyset(&sa.sa_mask);
    sigaction(SIGSEGV, &sa, 0);

    /* XLib sucks */
    XkbIgnoreExtension(True);

    /* X stuff */
    globalconf.display = XOpenDisplay(NULL);
    if (globalconf.display == NULL)
        fatal("cannot open display");

    globalconf.default_screen = XDefaultScreen(globalconf.display);

    globalconf.connection = XGetXCBConnection(globalconf.display);

    /* Double checking then everything is OK. */
    if(xcb_connection_has_error(globalconf.connection))
        fatal("cannot open display");

    /* Prefetch all the extensions we might need */
    xcb_prefetch_extension_data(globalconf.connection, &xcb_big_requests_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_test_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_randr_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_shape_id);

    /* initialize dbus */
    a_dbus_init();

    /* Get the file descriptor corresponding to the X connection */
    xfd = xcb_get_file_descriptor(globalconf.connection);
    ev_io_init(&xio, &a_xcb_io_cb, xfd, EV_READ);
    ev_io_start(globalconf.loop, &xio);
    ev_check_init(&xcheck, &a_xcb_check_cb);
    ev_check_start(globalconf.loop, &xcheck);
    ev_unref(globalconf.loop);
    ev_prepare_init(&a_refresh, &a_refresh_cb);
    ev_prepare_start(globalconf.loop, &a_refresh);
    ev_unref(globalconf.loop);

    /* Grab server */
    xcb_grab_server(globalconf.connection);

    /* Make sure there are no pending events. Since we didn't really do anything
     * at all yet, we will just discard all events which we received so far.
     * The above GrabServer should make sure no new events are generated. */
    xcb_aux_sync(globalconf.connection);
    while ((event = xcb_poll_for_event(globalconf.connection)) != NULL)
    {
        /* Make sure errors are printed */
        uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
        if(response_type == 0)
            event_handle(event);
        p_delete(&event);
    }

    for(screen_nbr = 0;
        screen_nbr < xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
        screen_nbr++)
    {
        const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;

        /* This causes an error if some other window manager is running */
        xcb_change_window_attributes(globalconf.connection,
                                     xutil_screen_get(globalconf.connection, screen_nbr)->root,
                                     XCB_CW_EVENT_MASK, &select_input_val);
    }

    /* Need to xcb_flush to validate error handler */
    xcb_aux_sync(globalconf.connection);

    /* Process all errors in the queue if any. There can be no events yet, so if
     * this function returns something, it must be an error. */
    if (xcb_poll_for_event(globalconf.connection) != NULL)
        fatal("another window manager is already running");

    /* Prefetch the maximum request length */
    xcb_prefetch_maximum_request_length(globalconf.connection);

    /* check for xtest extension */
    const xcb_query_extension_reply_t *xtest_query;
    xtest_query = xcb_get_extension_data(globalconf.connection, &xcb_test_id);
    globalconf.have_xtest = xtest_query->present;

    /* Allocate the key symbols */
    globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
    xcb_get_modifier_mapping_cookie_t xmapping_cookie =
        xcb_get_modifier_mapping_unchecked(globalconf.connection);

    /* init atom cache */
    atoms_init(globalconf.connection);

    /* init screens information */
    screen_scan();

    /* init default font and colors */
    colors_reqs[0] = xcolor_init_unchecked(&globalconf.colors.fg,
                                           "black", sizeof("black") - 1);

    colors_reqs[1] = xcolor_init_unchecked(&globalconf.colors.bg,
                                           "white", sizeof("white") - 1);

    globalconf.font = draw_font_new("sans 8");

    for(colors_nbr = 0; colors_nbr < 2; colors_nbr++)
        xcolor_init_reply(colors_reqs[colors_nbr]);

    xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
                        globalconf.keysyms, &globalconf.numlockmask,
                        &globalconf.shiftlockmask, &globalconf.capslockmask,
                        &globalconf.modeswitchmask);

    /* Get the window tree associated to this screen */
    const int screen_max = xcb_setup_roots_length(xcb_get_setup(globalconf.connection));
    xcb_query_tree_cookie_t tree_c[screen_max];

    /* do this only for real screen */
    for(screen_nbr = 0; screen_nbr < screen_max; screen_nbr++)
    {
        /* select for events */
        const uint32_t change_win_vals[] =
        {
            XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY
                | XCB_EVENT_MASK_ENTER_WINDOW | XCB_EVENT_MASK_LEAVE_WINDOW
                | XCB_EVENT_MASK_STRUCTURE_NOTIFY
                | XCB_EVENT_MASK_PROPERTY_CHANGE
                | XCB_EVENT_MASK_BUTTON_PRESS
                | XCB_EVENT_MASK_BUTTON_RELEASE
                | XCB_EVENT_MASK_FOCUS_CHANGE
        };

        tree_c[screen_nbr] = xcb_query_tree_unchecked(globalconf.connection,
                                                      xutil_screen_get(globalconf.connection, screen_nbr)->root);

        xcb_change_window_attributes(globalconf.connection,
                                     xutil_screen_get(globalconf.connection, screen_nbr)->root,
                                     XCB_CW_EVENT_MASK,
                                     change_win_vals);
        ewmh_init(screen_nbr);
        systray_init(screen_nbr);
    }

    /* init spawn (sn) */
    spawn_init();

    /* we will receive events, stop grabbing server */
    xcb_ungrab_server(globalconf.connection);

    /* Parse and run configuration file */
    if (!luaA_parserc(&xdg, confpath, true))
        fatal("couldn't find any rc file");

    scan(tree_c);

    xcb_flush(globalconf.connection);

    /* main event loop */
    ev_loop(globalconf.loop, 0);

    /* cleanup event loop */
    ev_ref(globalconf.loop);
    ev_check_stop(globalconf.loop, &xcheck);
    ev_ref(globalconf.loop);
    ev_prepare_stop(globalconf.loop, &a_refresh);
    ev_ref(globalconf.loop);
    ev_io_stop(globalconf.loop, &xio);

    awesome_atexit(false);

    return EXIT_SUCCESS;
}
示例#13
0
/** Get the current X selection buffer.
 * \param L The Lua VM state.
 * \return The number of elements pushed on stack.
 * \luastack
 * \lreturn A string with the current X selection buffer.
 */
static int
luaA_selection_get(lua_State *L)
{
    luaA_deprecate(L, "selection.getter(\"PRIMARY\", \"UTF8_STRING\")");
    if(selection_window == XCB_NONE)
    {
        xcb_screen_t *screen = globalconf.screen;
        uint32_t mask = XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK;
        uint32_t values[] = { screen->black_pixel, 1, XCB_EVENT_MASK_PROPERTY_CHANGE };

        selection_window = xcb_generate_id(globalconf.connection);

        xcb_create_window(globalconf.connection, screen->root_depth, selection_window, screen->root,
                          0, 0, 1, 1, 0, XCB_COPY_FROM_PARENT, screen->root_visual,
                          mask, values);
        xwindow_set_class_instance(selection_window);
        xwindow_set_name_static(selection_window, "Awesome selection window");
    }

    xcb_convert_selection(globalconf.connection, selection_window,
                          XCB_ATOM_PRIMARY, UTF8_STRING, XSEL_DATA, globalconf.timestamp);
    xcb_flush(globalconf.connection);

    xcb_generic_event_t *event;

    while(true)
    {
        event = xcb_wait_for_event(globalconf.connection);

        if(!event)
            return 0;

        if(XCB_EVENT_RESPONSE_TYPE(event) != XCB_SELECTION_NOTIFY)
        {
            /* \todo Eventually, this may be rewritten with adding a static
             * buffer, then a event handler for XCB_SELECTION_NOTIFY, then call
             * xcb_event_poll_for_event_loop() and awesome_refresh(),
             * then check if some static buffer has been filled with data.
             * If yes, that'd be the xsel data, otherwise, re-loop.
             * Anyway that's still brakes the socket or D-Bus, so maybe using
             * ev_loop() would be even better.
             */
            event_handle(event);
            p_delete(&event);
            awesome_refresh();
            continue;
        }

        xcb_selection_notify_event_t *event_notify =
            (xcb_selection_notify_event_t *) event;

        if(event_notify->selection == XCB_ATOM_PRIMARY
           && event_notify->property != XCB_NONE)
        {
            xcb_icccm_get_text_property_reply_t prop;
            xcb_get_property_cookie_t cookie =
                xcb_icccm_get_text_property(globalconf.connection,
					    event_notify->requestor,
					    event_notify->property);

            if(xcb_icccm_get_text_property_reply(globalconf.connection,
						 cookie, &prop, NULL))
	      {
                lua_pushlstring(L, prop.name, prop.name_len);

                xcb_icccm_get_text_property_reply_wipe(&prop);

                xcb_delete_property(globalconf.connection,
                                    event_notify->requestor,
                                    event_notify->property);

                p_delete(&event);

                return 1;
            }
            else
                break;
        }
    }

    p_delete(&event);
    return 0;
}
示例#14
0
文件: awesome.c 项目: klug/awesome
/** Hello, this is main.
 * \param argc Who knows.
 * \param argv Who knows.
 * \return EXIT_SUCCESS I hope.
 */
int
main(int argc, char **argv)
{
    char *confpath = NULL;
    int xfd, i, opt;
    ssize_t cmdlen = 1;
    xdgHandle xdg;
    bool no_argb = false;
    xcb_generic_event_t *event;
    xcb_query_tree_cookie_t tree_c;
    static struct option long_options[] =
    {
        { "help",    0, NULL, 'h' },
        { "version", 0, NULL, 'v' },
        { "config",  1, NULL, 'c' },
        { "check",   0, NULL, 'k' },
        { "no-argb", 0, NULL, 'a' },
        { NULL,      0, NULL, 0 }
    };

    /* event loop watchers */
    ev_io xio    = { .fd = -1 };
    ev_check xcheck;
    ev_prepare a_refresh;
    ev_signal sigint;
    ev_signal sigterm;
    ev_signal sighup;

    /* clear the globalconf structure */
    p_clear(&globalconf, 1);
    globalconf.keygrabber = LUA_REFNIL;
    globalconf.mousegrabber = LUA_REFNIL;
    buffer_init(&globalconf.startup_errors);

    /* save argv */
    for(i = 0; i < argc; i++)
        cmdlen += a_strlen(argv[i]) + 1;

    awesome_argv = p_new(char, cmdlen);
    a_strcpy(awesome_argv, cmdlen, argv[0]);

    for(i = 1; i < argc; i++)
    {
        a_strcat(awesome_argv, cmdlen, " ");
        a_strcat(awesome_argv, cmdlen, argv[i]);
    }

    /* Text won't be printed correctly otherwise */
    setlocale(LC_CTYPE, "");

    /* Get XDG basedir data */
    xdgInitHandle(&xdg);

    /* init lua */
    luaA_init(&xdg);

    /* check args */
    while((opt = getopt_long(argc, argv, "vhkc:a",
                             long_options, NULL)) != -1)
        switch(opt)
        {
        case 'v':
            eprint_version();
            break;
        case 'h':
            exit_help(EXIT_SUCCESS);
            break;
        case 'k':
            if(!luaA_parserc(&xdg, confpath, false))
            {
                fprintf(stderr, "✘ Configuration file syntax error.\n");
                return EXIT_FAILURE;
            }
            else
            {
                fprintf(stderr, "✔ Configuration file syntax OK.\n");
                return EXIT_SUCCESS;
            }
        case 'c':
            if(a_strlen(optarg))
                confpath = a_strdup(optarg);
            else
                fatal("-c option requires a file name");
            break;
        case 'a':
            no_argb = true;
            break;
        }

    globalconf.loop = ev_default_loop(EVFLAG_NOSIGFD);

    /* register function for signals */
    ev_signal_init(&sigint, exit_on_signal, SIGINT);
    ev_signal_init(&sigterm, exit_on_signal, SIGTERM);
    ev_signal_init(&sighup, restart_on_signal, SIGHUP);
    ev_signal_start(globalconf.loop, &sigint);
    ev_signal_start(globalconf.loop, &sigterm);
    ev_signal_start(globalconf.loop, &sighup);
    ev_unref(globalconf.loop);
    ev_unref(globalconf.loop);
    ev_unref(globalconf.loop);

    struct sigaction sa = { .sa_handler = signal_fatal, .sa_flags = 0 };
    sigemptyset(&sa.sa_mask);
    sigaction(SIGSEGV, &sa, 0);

    /* X stuff */
    globalconf.connection = xcb_connect(NULL, &globalconf.default_screen);
    if(xcb_connection_has_error(globalconf.connection))
        fatal("cannot open display");

    globalconf.screen = xcb_aux_get_screen(globalconf.connection, globalconf.default_screen);
    /* FIXME The following two assignments were swapped on purpose */
    if(!no_argb)
        globalconf.visual = a_default_visual(globalconf.screen);
    if(!globalconf.visual)
        globalconf.visual = a_argb_visual(globalconf.screen);
    globalconf.default_depth = a_visual_depth(globalconf.screen, globalconf.visual->visual_id);
    globalconf.default_cmap = globalconf.screen->default_colormap;
    if(globalconf.default_depth != globalconf.screen->root_depth)
    {
        // We need our own color map if we aren't using the default depth
        globalconf.default_cmap = xcb_generate_id(globalconf.connection);
        xcb_create_colormap(globalconf.connection, XCB_COLORMAP_ALLOC_NONE,
                            globalconf.default_cmap, globalconf.screen->root,
                            globalconf.visual->visual_id);
    }

    /* Prefetch all the extensions we might need */
    xcb_prefetch_extension_data(globalconf.connection, &xcb_big_requests_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_test_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_randr_id);
    xcb_prefetch_extension_data(globalconf.connection, &xcb_xinerama_id);

    /* initialize dbus */
    a_dbus_init();

    /* Get the file descriptor corresponding to the X connection */
    xfd = xcb_get_file_descriptor(globalconf.connection);
    ev_io_init(&xio, &a_xcb_io_cb, xfd, EV_READ);
    ev_io_start(globalconf.loop, &xio);
    ev_check_init(&xcheck, &a_xcb_check_cb);
    ev_check_start(globalconf.loop, &xcheck);
    ev_unref(globalconf.loop);
    ev_prepare_init(&a_refresh, &a_refresh_cb);
    ev_prepare_start(globalconf.loop, &a_refresh);
    ev_unref(globalconf.loop);

    /* Grab server */
    xcb_grab_server(globalconf.connection);

    /* Make sure there are no pending events. Since we didn't really do anything
     * at all yet, we will just discard all events which we received so far.
     * The above GrabServer should make sure no new events are generated. */
    xcb_aux_sync(globalconf.connection);
    while ((event = xcb_poll_for_event(globalconf.connection)) != NULL)
    {
        /* Make sure errors are printed */
        uint8_t response_type = XCB_EVENT_RESPONSE_TYPE(event);
        if(response_type == 0)
            event_handle(event);
        p_delete(&event);
    }

    {
        const uint32_t select_input_val = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT;

        /* This causes an error if some other window manager is running */
        xcb_change_window_attributes(globalconf.connection,
                                     globalconf.screen->root,
                                     XCB_CW_EVENT_MASK, &select_input_val);
    }

    /* Need to xcb_flush to validate error handler */
    xcb_aux_sync(globalconf.connection);

    /* Process all errors in the queue if any. There can be no events yet, so if
     * this function returns something, it must be an error. */
    if (xcb_poll_for_event(globalconf.connection) != NULL)
        fatal("another window manager is already running");

    /* Prefetch the maximum request length */
    xcb_prefetch_maximum_request_length(globalconf.connection);

    /* check for xtest extension */
    const xcb_query_extension_reply_t *xtest_query;
    xtest_query = xcb_get_extension_data(globalconf.connection, &xcb_test_id);
    globalconf.have_xtest = xtest_query->present;

    /* Allocate the key symbols */
    globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
    xcb_get_modifier_mapping_cookie_t xmapping_cookie =
        xcb_get_modifier_mapping_unchecked(globalconf.connection);

    /* init atom cache */
    atoms_init(globalconf.connection);

    /* init screens information */
    screen_scan();

    xutil_lock_mask_get(globalconf.connection, xmapping_cookie,
                        globalconf.keysyms, &globalconf.numlockmask,
                        &globalconf.shiftlockmask, &globalconf.capslockmask,
                        &globalconf.modeswitchmask);

    /* do this only for real screen */
    ewmh_init();
    systray_init();

    /* init spawn (sn) */
    spawn_init();

    /* The default GC is just a newly created associated with a window with
     * depth globalconf.default_depth */
    xcb_window_t tmp_win = xcb_generate_id(globalconf.connection);
    globalconf.gc = xcb_generate_id(globalconf.connection);
    xcb_create_window(globalconf.connection, globalconf.default_depth,
                      tmp_win, globalconf.screen->root,
                      -1, -1, 1, 1, 0,
                      XCB_COPY_FROM_PARENT, globalconf.visual->visual_id,
                      XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_COLORMAP,
                      (const uint32_t [])
    {
        globalconf.screen->black_pixel,
                          globalconf.screen->black_pixel,
                          globalconf.default_cmap
    });
    xcb_create_gc(globalconf.connection, globalconf.gc, tmp_win, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND,
    (const uint32_t[]) {
        globalconf.screen->black_pixel, globalconf.screen->white_pixel
    });
    xcb_destroy_window(globalconf.connection, tmp_win);

    /* Get the window tree associated to this screen */
    tree_c = xcb_query_tree_unchecked(globalconf.connection,
                                      globalconf.screen->root);

    xcb_change_window_attributes(globalconf.connection,
                                 globalconf.screen->root,
                                 XCB_CW_EVENT_MASK,
                                 ROOT_WINDOW_EVENT_MASK);

    /* we will receive events, stop grabbing server */
    xcb_ungrab_server(globalconf.connection);

    /* Parse and run configuration file */
    if (!luaA_parserc(&xdg, confpath, true))
        fatal("couldn't find any rc file");

    p_delete(&confpath);

    xdgWipeHandle(&xdg);

    /* scan existing windows */
    scan(tree_c);

    xcb_flush(globalconf.connection);

    /* main event loop */
    ev_loop(globalconf.loop, 0);

    /* cleanup event loop */
    ev_ref(globalconf.loop);
    ev_check_stop(globalconf.loop, &xcheck);
    ev_ref(globalconf.loop);
    ev_prepare_stop(globalconf.loop, &a_refresh);
    ev_ref(globalconf.loop);
    ev_io_stop(globalconf.loop, &xio);

    awesome_atexit(false);

    return EXIT_SUCCESS;
}