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0e4c6d0a87
Acquiring the Clutter lock to mark critical sections is not portable, and not recommended to implement threaded applications with Clutter. The recommended pattern is to use worker threads, and schedule UI updates inside idle or timeout handlers within the main loop. We should enforce this pattern by deprecating the threads_enter()/leave() functions. For compatibility concerns, we need internal API to acquire the main lock during frame processing dispatch. https://bugzilla.gnome.org/show_bug.cgi?id=679450
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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* Authors:
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* Matthew Allum
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* Robert Bragg
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* Kristian Høgsberg
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdint.h>
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#include <stdlib.h>
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#include <wayland-client.h>
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#include "clutter-event.h"
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#include "clutter-main.h"
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#include "clutter-private.h"
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#include "clutter-event-wayland.h"
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typedef struct _ClutterEventSourceWayland
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{
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GSource source;
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GPollFD pfd;
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uint32_t mask;
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struct wl_display *display;
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} ClutterEventSourceWayland;
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static gboolean
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clutter_event_source_wayland_prepare (GSource *base, gint *timeout)
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{
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ClutterEventSourceWayland *source = (ClutterEventSourceWayland *) base;
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gboolean retval;
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_clutter_threads_acquire_lock ();
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*timeout = -1;
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/* We have to add/remove the GPollFD if we want to update our
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* poll event mask dynamically. Instead, let's just flush all
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* writes on idle */
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wl_display_flush (source->display);
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retval = clutter_events_pending ();
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_clutter_threads_release_lock ();
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return retval;
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}
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static gboolean
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clutter_event_source_wayland_check (GSource *base)
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{
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ClutterEventSourceWayland *source = (ClutterEventSourceWayland *) base;
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gboolean retval;
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_clutter_threads_acquire_lock ();
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retval = clutter_events_pending () || source->pfd.revents;
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_clutter_threads_release_lock ();
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return retval;
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}
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static gboolean
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clutter_event_source_wayland_dispatch (GSource *base,
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GSourceFunc callback,
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gpointer data)
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{
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ClutterEventSourceWayland *source = (ClutterEventSourceWayland *) base;
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ClutterEvent *event;
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_clutter_threads_acquire_lock ();
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if (source->pfd.revents)
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{
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wl_display_iterate (source->display, WL_DISPLAY_READABLE);
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source->pfd.revents = 0;
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}
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event = clutter_event_get ();
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if (event)
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{
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/* forward the event into clutter for emission etc. */
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clutter_do_event (event);
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clutter_event_free (event);
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}
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_clutter_threads_release_lock ();
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return TRUE;
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}
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static GSourceFuncs clutter_event_source_wayland_funcs = {
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clutter_event_source_wayland_prepare,
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clutter_event_source_wayland_check,
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clutter_event_source_wayland_dispatch,
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NULL
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};
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static int
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clutter_event_source_wayland_update (uint32_t mask, void *data)
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{
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ClutterEventSourceWayland *source = data;
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source->mask = mask;
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return 0;
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}
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GSource *
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_clutter_event_source_wayland_new (struct wl_display *display)
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{
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ClutterEventSourceWayland *source;
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source = (ClutterEventSourceWayland *)
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g_source_new (&clutter_event_source_wayland_funcs,
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sizeof (ClutterEventSourceWayland));
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source->display = display;
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source->pfd.fd =
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wl_display_get_fd (display,
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clutter_event_source_wayland_update, source);
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source->pfd.events = G_IO_IN | G_IO_ERR;
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g_source_add_poll (&source->source, &source->pfd);
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return &source->source;
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}
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