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evdev: Merge clutter-event-evdev.[ch] into the device manager

Browse Source 
The device manager now fully owns the GSources corresponding to the
devices it manages. This will allow not only to remove the source when
udev signals a device removal but also handle read() errors gracefully
by removing the faulty device from the manager.
This commit is contained in:
Damien Lespiau 2010-11-09 12:50:23 -05:00
parent afee3b009c
commit afd279dd76
6 changed files with 320 additions and 407 deletions
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2
clutter/Makefile.am
View File

@ -437,13 +437,11 @@ evdev_c_priv = \
$(srcdir)/evdev/clutter-xkb-utils.c \
$(srcdir)/evdev/clutter-device-manager-evdev.c \
$(srcdir)/evdev/clutter-input-device-evdev.c \
$(srcdir)/evdev/clutter-event-evdev.c \
$(NULL)
evdev_h_priv = \
$(srcdir)/evdev/clutter-xkb-utils.h \
$(srcdir)/evdev/clutter-device-manager-evdev.h \
$(srcdir)/evdev/clutter-input-device-evdev.h \
$(srcdir)/evdev/clutter-event-evdev.h \
$(NULL)
egl_cex_c_priv = $(srcdir)/egl/clutter-backend-cex100.c

1
clutter/egl/clutter-backend-egl.c
View File

@ -42,7 +42,6 @@
#ifdef HAVE_EVDEV
#include "clutter-device-manager-evdev.h"
#include "clutter-event-evdev.h"
#endif
#include "clutter-debug.h"

318
clutter/evdev/clutter-device-manager-evdev.c
View File

@ -26,15 +26,25 @@
#endif
#include <linux/input.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <glib.h>
#include <gudev/gudev.h>
#include "clutter-backend.h"
#include "clutter-debug.h"
#include "clutter-device-manager.h"
#include "clutter-device-manager-private.h"
#include "clutter-event.h"
#include "clutter-input-device-evdev.h"
#include "clutter-main.h"
#include "clutter-private.h"
#include "clutter-xkb-utils.h"
#include "clutter-device-manager-evdev.h"
@ -51,7 +61,8 @@ struct _ClutterDeviceManagerEvdevPrivate
{
GUdevClient *udev_client;
GSList *devices;
GSList *devices; /* list of ClutterInputDeviceEvdevs */
GSList *event_sources; /* list of the event sources */
ClutterInputDevice *core_pointer;
ClutterInputDevice *core_keyboard;
@ -59,6 +70,249 @@ struct _ClutterDeviceManagerEvdevPrivate
static const gchar *subsystems[] = { "input", NULL };
/*
* ClutterEventSource management
*
* The device manager is responsible for managing the GSource when devices
* appear and disappear from the system
*/
const char *option_xkb_layout = "us";
const char *option_xkb_variant = "";
const char *option_xkb_options = "";
/*
* ClutterEventSource for reading input devices
*/
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterInputDeviceEvdev *device; /* back pointer to the evdev device */
GPollFD event_poll_fd; /* file descriptor of the /dev node */
struct xkb_desc *xkb; /* compiled xkb keymap */
uint32_t modifier_state; /* remember the modifier state */
};
static gboolean
clutter_event_prepare (GSource *source,
gint *timeout)
{
gboolean retval;
clutter_threads_enter ();
*timeout = -1;
retval = clutter_events_pending ();
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_check (GSource *source)
{
ClutterEventSource *event_source = (ClutterEventSource *) source;
gboolean retval;
clutter_threads_enter ();
retval = ((event_source->event_poll_fd.revents & G_IO_IN) ||
clutter_events_pending ());
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_dispatch (GSource *g_source,
GSourceFunc callback,
gpointer user_data)
{
ClutterEventSource *source = (ClutterEventSource *) g_source;
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
ClutterMainContext *clutter_context;
struct input_event ev[8];
ClutterEvent *event = NULL;
ClutterStage *stage;
gint len, i;
clutter_threads_enter ();
clutter_context = _clutter_context_get_default ();
stage = CLUTTER_STAGE (clutter_stage_get_default ());
/* Don't queue more events if we haven't finished handling the previous batch
*/
if (!clutter_events_pending ())
{
len = read (source->event_poll_fd.fd, &ev, sizeof (ev));
if (len < 0 || len % sizeof (ev[0]) != 0)
{
if (errno != EAGAIN)
{
g_warning ("Could not read device (%d)", errno);
}
goto out;
}
for (i = 0; i < len / sizeof (ev[0]); i++)
{
struct input_event *e = &ev[i];
uint32_t _time;
_time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
switch (e->type)
{
case EV_KEY:
/* don't repeat mouse buttons */
if (e->code >= BTN_MOUSE && e->code < KEY_OK)
if (e->value == 2)
continue;
event =
_clutter_key_event_new_from_evdev (input_device,
stage,
source->xkb,
_time, e->code, e->value,
&source->modifier_state);
break;
case EV_SYN:
/* Nothing to do here? */
break;
case EV_MSC:
/* Nothing to do here? */
break;
case EV_ABS:
case EV_REL:
default:
g_warning ("Unhandled event of type %d", e->type);
break;
}
if (event)
{
g_queue_push_head (clutter_context->events_queue, event);
event = NULL;
}
}
}
/* Pop an event off the queue if any */
event = clutter_event_get ();
if (event)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
out:
clutter_threads_leave ();
return TRUE;
}
static GSourceFuncs event_funcs = {
clutter_event_prepare,
clutter_event_check,
clutter_event_dispatch,
NULL
};
static GSource *
clutter_event_source_new (ClutterInputDeviceEvdev *input_device)
{
GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
ClutterEventSource *event_source = (ClutterEventSource *) source;
const gchar *node_path;
gint fd;
/* grab the udev input device node and open it */
node_path = _clutter_input_device_evdev_get_device_path (input_device);
CLUTTER_NOTE (EVENT, "Creating GSource for device %s", node_path);
fd = open (node_path, O_RDONLY | O_NONBLOCK);
if (fd < 0)
{
g_warning ("Could not open device %s: %s", node_path, strerror (errno));
return NULL;
}
/* setup the source */
event_source->device = input_device;
event_source->event_poll_fd.fd = fd;
event_source->event_poll_fd.events = G_IO_IN;
/* create the xkb description */
event_source->xkb = _clutter_xkb_desc_new (NULL,
option_xkb_layout,
option_xkb_variant,
option_xkb_options);
if (G_UNLIKELY (event_source->xkb == NULL))
{
g_warning ("Could not compile keymap %s:%s:%s", option_xkb_layout,
option_xkb_variant, option_xkb_options);
close (fd);
g_source_unref (source);
return NULL;
}
/* and finally configure and attach the GSource */
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
g_source_add_poll (source, &event_source->event_poll_fd);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
return source;
}
static void
clutter_event_source_free (ClutterEventSource *source)
{
GSource *g_source = (GSource *) source;
const gchar *node_path;
node_path = _clutter_input_device_evdev_get_device_path (source->device);
CLUTTER_NOTE (EVENT, "Removing GSource for device %s", node_path);
/* ignore the return value of close, it's not like we can do something
* about it */
close (source->event_poll_fd.fd);
g_source_destroy (g_source);
g_source_unref (g_source);
}
static ClutterEventSource *
find_source_by_device (ClutterDeviceManagerEvdev *manager,
ClutterInputDevice *device)
{
ClutterDeviceManagerEvdevPrivate *priv = manager->priv;
GSList *l;
for (l = priv->event_sources; l; l = g_slist_next (l))
{
ClutterEventSource *source = l->data;
if (source->device == (ClutterInputDeviceEvdev *) device)
return source;
}
return NULL;
}
static gboolean
is_evdev (const gchar *sysfs_path)
{
@ -200,11 +454,15 @@ clutter_device_manager_evdev_add_device (ClutterDeviceManager *manager,
ClutterDeviceManagerEvdev *manager_evdev;
ClutterDeviceManagerEvdevPrivate *priv;
ClutterInputDeviceType device_type;
ClutterInputDeviceEvdev *device_evdev;
gboolean is_pointer, is_keyboard;
GSource *source;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (manager);
priv = manager_evdev->priv;
device_evdev = CLUTTER_INPUT_DEVICE_EVDEV (device);
device_type = clutter_input_device_get_device_type (device);
is_pointer = device_type == CLUTTER_POINTER_DEVICE;
is_keyboard = device_type == CLUTTER_KEYBOARD_DEVICE;
@ -216,6 +474,11 @@ clutter_device_manager_evdev_add_device (ClutterDeviceManager *manager,
if (is_keyboard && priv->core_keyboard == NULL)
priv->core_keyboard = device;
/* Install the GSource for this device */
source = clutter_event_source_new (device_evdev);
if (G_LIKELY (source))
priv->event_sources = g_slist_prepend (priv->event_sources, source);
}
static void
@ -224,11 +487,24 @@ clutter_device_manager_evdev_remove_device (ClutterDeviceManager *manager,
{
ClutterDeviceManagerEvdev *manager_evdev;
ClutterDeviceManagerEvdevPrivate *priv;
ClutterEventSource *source;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (manager);
priv = manager_evdev->priv;
/* Remove the device */
priv->devices = g_slist_remove (priv->devices, device);
/* Remove the source */
source = find_source_by_device (manager_evdev, device);
if (G_UNLIKELY (source == NULL))
{
g_warning ("Trying to remove a device without a source installed ?!");
return;
}
clutter_event_source_free (source);
priv->event_sources = g_slist_remove (priv->event_sources, source);
}
static const GSList *
@ -321,12 +597,29 @@ clutter_device_manager_evdev_finalize (GObject *object)
{
ClutterDeviceManagerEvdev *manager_evdev;
ClutterDeviceManagerEvdevPrivate *priv;
GSList *l;
manager_evdev = CLUTTER_DEVICE_MANAGER_EVDEV (object);
priv = manager_evdev->priv;
g_object_unref (priv->udev_client);
for (l = priv->devices; l; l = g_slist_next (l))
{
ClutterInputDevice *device = l->data;
g_object_unref (device);
}
g_slist_free (priv->devices);
for (l = priv->event_sources; l; l = g_slist_next (l))
{
ClutterEventSource *source = l->data;
clutter_event_source_free (source);
}
g_slist_free (priv->event_sources);
G_OBJECT_CLASS (clutter_device_manager_evdev_parent_class)->finalize (object);
}
@ -354,3 +647,26 @@ clutter_device_manager_evdev_init (ClutterDeviceManagerEvdev *self)
{
self->priv = CLUTTER_DEVICE_MANAGER_EVDEV_GET_PRIVATE (self);
}
/*
* _clutter_events_evdev_init() and _clutter_events_evdev_uninit() are the two
* symbol to use the evdev event backend from the EGL backend
*/
void
_clutter_events_evdev_init (ClutterBackend *backend)
{
CLUTTER_NOTE (EVENT, "Initializing evdev backend");
/* We just have to create the singleon here */
clutter_device_manager_get_default ();
}
void
_clutter_events_evdev_uninit (ClutterBackend *backend)
{
ClutterDeviceManager *manager;
manager = clutter_device_manager_get_default ();
g_object_unref (manager);
}

3
clutter/evdev/clutter-device-manager-evdev.h
View File

@ -53,6 +53,9 @@ struct _ClutterDeviceManagerEvdevClass
GType clutter_device_manager_evdev_get_type (void) G_GNUC_CONST;
void _clutter_events_evdev_init (ClutterBackend *backend);
void _clutter_events_evdev_uninit (ClutterBackend *backend);
G_END_DECLS
#endif /* __CLUTTER_DEVICE_MANAGER_EVDEV_H__ */

367
clutter/evdev/clutter-event-evdev.c
View File

@ -1,367 +0,0 @@
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2006-2007 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Damien Lespiau <damien.lespiau@intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <linux/input.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <glib.h>
#include <gudev/gudev.h>
#include "clutter-backend.h"
#include "clutter-debug.h"
#include "clutter-device-manager.h"
#include "clutter-event.h"
#include "clutter-input-device-evdev.h"
#include "clutter-main.h"
#include "clutter-private.h"
#include "clutter-xkb-utils.h"
/* List of all the event sources */
static GSList *event_sources = NULL;
const char *option_xkb_layout = "us";
const char *option_xkb_variant = "";
const char *option_xkb_options = "";
/*
* ClutterEventSource for reading input devices
*/
typedef struct _ClutterEventSource ClutterEventSource;
struct _ClutterEventSource
{
GSource source;
ClutterInputDeviceEvdev *device; /* back pointer to the evdev device */
GPollFD event_poll_fd; /* file descriptor of the /dev node */
struct xkb_desc *xkb; /* compiled xkb keymap */
uint32_t modifier_state; /* remember the modifier state */
};
static gboolean
clutter_event_prepare (GSource *source,
gint *timeout)
{
gboolean retval;
clutter_threads_enter ();
*timeout = -1;
retval = clutter_events_pending ();
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_check (GSource *source)
{
ClutterEventSource *event_source = (ClutterEventSource *) source;
gboolean retval;
clutter_threads_enter ();
retval = ((event_source->event_poll_fd.revents & G_IO_IN) ||
clutter_events_pending ());
clutter_threads_leave ();
return retval;
}
static gboolean
clutter_event_dispatch (GSource *g_source,
GSourceFunc callback,
gpointer user_data)
{
ClutterEventSource *source = (ClutterEventSource *) g_source;
ClutterInputDevice *input_device = (ClutterInputDevice *) source->device;
ClutterMainContext *clutter_context;
struct input_event ev[8];
ClutterEvent *event = NULL;
ClutterStage *stage;
gint len, i;
clutter_threads_enter ();
clutter_context = _clutter_context_get_default ();
stage = CLUTTER_STAGE (clutter_stage_get_default ());
/* Don't queue more events if we haven't finished handling the previous batch
*/
if (!clutter_events_pending ())
{
len = read (source->event_poll_fd.fd, &ev, sizeof (ev));
if (len < 0 || len % sizeof (ev[0]) != 0)
{
if (errno != EAGAIN)
{
g_warning ("Could not read device (%d)", errno);
}
goto out;
}
for (i = 0; i < len / sizeof (ev[0]); i++)
{
struct input_event *e = &ev[i];
uint32_t _time;
_time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
switch (e->type)
{
case EV_KEY:
/* don't repeat mouse buttons */
if (e->code >= BTN_MOUSE && e->code < KEY_OK)
if (e->value == 2)
continue;
event =
_clutter_key_event_new_from_evdev (input_device,
stage,
source->xkb,
_time, e->code, e->value,
&source->modifier_state);
break;
case EV_SYN:
/* Nothing to do here? */
break;
case EV_MSC:
/* Nothing to do here? */
break;
case EV_ABS:
case EV_REL:
default:
g_warning ("Unhandled event of type %d", e->type);
break;
}
if (event)
{
g_queue_push_head (clutter_context->events_queue, event);
event = NULL;
}
}
}
/* Pop an event off the queue if any */
event = clutter_event_get ();
if (event)
{
/* forward the event into clutter for emission etc. */
clutter_do_event (event);
clutter_event_free (event);
}
out:
clutter_threads_leave ();
return TRUE;
}
static GSourceFuncs event_funcs = {
clutter_event_prepare,
clutter_event_check,
clutter_event_dispatch,
NULL
};
static GSource *
clutter_event_source_new (ClutterInputDeviceEvdev *input_device)
{
GSource *source = g_source_new (&event_funcs, sizeof (ClutterEventSource));
ClutterEventSource *event_source = (ClutterEventSource *) source;
const gchar *node_path;
gint fd;
/* grab the udev input device node and open it */
node_path = _clutter_input_device_evdev_get_device_path (input_device);
CLUTTER_NOTE (EVENT, "Creating GSource for device %s", node_path);
fd = open (node_path, O_RDONLY | O_NONBLOCK);
if (fd < 0)
{
g_warning ("Could not open device %s: %s", node_path, strerror (errno));
return NULL;
}
/* setup the source */
event_source->device = input_device;
event_source->event_poll_fd.fd = fd;
event_source->event_poll_fd.events = G_IO_IN;
/* create the xkb description */
event_source->xkb = _clutter_xkb_desc_new (NULL,
option_xkb_layout,
option_xkb_variant,
option_xkb_options);
if (G_UNLIKELY (event_source->xkb == NULL))
{
g_warning ("Could not compile keymap %s:%s:%s", option_xkb_layout,
option_xkb_variant, option_xkb_options);
close (fd);
g_source_unref (source);
return NULL;
}
/* and finally configure and attach the GSource */
g_source_set_priority (source, CLUTTER_PRIORITY_EVENTS);
g_source_add_poll (source, &event_source->event_poll_fd);
g_source_set_can_recurse (source, TRUE);
g_source_attach (source, NULL);
return source;
}
static void
clutter_event_source_free (ClutterEventSource *source)
{
GSource *g_source = (GSource *) source;
const gchar *node_path;
node_path = _clutter_input_device_evdev_get_device_path (source->device);
CLUTTER_NOTE (EVENT, "Removing GSource for device %s", node_path);
/* ignore the return value of close, it's not like we can do something
* about it */
close (source->event_poll_fd.fd);
g_source_destroy (g_source);
g_source_unref (g_source);
}
static void
_clutter_event_evdev_add_source (ClutterInputDeviceEvdev *input_device)
{
GSource *source;
source = clutter_event_source_new (input_device);
if (G_LIKELY (source))
event_sources = g_slist_prepend (event_sources, source);
}
static void
_clutter_event_evdev_remove_source (ClutterEventSource *source)
{
clutter_event_source_free (source);
event_sources = g_slist_remove (event_sources, source);
}
static void
on_device_added (ClutterDeviceManager *manager,
ClutterInputDevice *device,
gpointer data)
{
ClutterInputDeviceEvdev *input_device = CLUTTER_INPUT_DEVICE_EVDEV (device);
_clutter_event_evdev_add_source (input_device);
}
static ClutterEventSource *
find_source_by_device (ClutterInputDevice *device)
{
GSList *l;
for (l = event_sources; l; l = g_slist_next (l))
{
ClutterEventSource *source = l->data;
if (source->device == (ClutterInputDeviceEvdev *) device)
return source;
}
return NULL;
}
static void
on_device_removed (ClutterDeviceManager *manager,
ClutterInputDevice *device,
gpointer data)
{
ClutterEventSource *source;
source = find_source_by_device (device);
if (G_UNLIKELY (source == NULL))
{
g_warning ("Trying to remove a device without a source installed ?!");
return;
}
_clutter_event_evdev_remove_source (source);
}
void
_clutter_events_evdev_init (ClutterBackend *backend)
{
ClutterDeviceManager *device_manager;
GSList *devices, *l;
CLUTTER_NOTE (EVENT, "Initializing evdev backend");
/* Of course, we assume that the singleton will be a
* ClutterDeviceManagerEvdev */
device_manager = clutter_device_manager_get_default ();
devices = clutter_device_manager_list_devices (device_manager);
for (l = devices; l; l = g_slist_next (l))
{
ClutterInputDeviceEvdev *input_device = l->data;
_clutter_event_evdev_add_source (input_device);
}
/* make sure to add/remove sources when devices are added/removed */
g_signal_connect (device_manager, "device-added",
G_CALLBACK (on_device_added), NULL);
g_signal_connect (device_manager, "device-removed",
G_CALLBACK (on_device_removed), NULL);
}
void
_clutter_events_evdev_uninit (ClutterBackend *backend)
{
GSList *l;
for (l = event_sources; l; l = g_slist_next (l))
{
ClutterEventSource *source = l->data;
clutter_event_source_free (source);
}
g_slist_free (event_sources);
}

36
clutter/evdev/clutter-event-evdev.h
View File

@ -1,36 +0,0 @@
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2010 Intel Corp.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Damien Lespiau <damien.lespiau@intel.com>
*/
#ifndef __CLUTTER_EVENT_EVDEV_H__
#define __CLUTTER_EVENT_EVDEV_H__
#include <glib.h>
#include <clutter/clutter-backend.h>
G_BEGIN_DECLS
void _clutter_events_evdev_init (ClutterBackend *backend);
void _clutter_events_evdev_uninit (ClutterBackend *backend);
#endif /* __CLUTTER_EVENT_EVDEV_H__ */