glib/gobject/gsignalgroup.c

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/* GObject - GLib Type, Object, Parameter and Signal Library
*
* Copyright (C) 2015-2022 Christian Hergert <christian@hergert.me>
* Copyright (C) 2015 Garrett Regier <garrettregier@gmail.com>
*
* 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 2.1 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/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "glib.h"
#include "glibintl.h"
#include "gparamspecs.h"
#include "gsignalgroup.h"
#include "gvaluetypes.h"
/**
* GSignalGroup:
*
* `GSignalGroup` manages a collection of signals on a `GObject`.
*
* `GSignalGroup` simplifies the process of connecting many signals to a `GObject`
* as a group. As such there is no API to disconnect a signal from the group.
*
* In particular, this allows you to:
*
* - Change the target instance, which automatically causes disconnection
* of the signals from the old instance and connecting to the new instance.
* - Block and unblock signals as a group
* - Ensuring that blocked state transfers across target instances.
*
* One place you might want to use such a structure is with `GtkTextView` and
* `GtkTextBuffer`. Often times, you'll need to connect to many signals on
* `GtkTextBuffer` from a `GtkTextView` subclass. This allows you to create a
* signal group during instance construction, simply bind the
* `GtkTextView:buffer` property to `GSignalGroup:target` and connect
* all the signals you need. When the `GtkTextView:buffer` property changes
* all of the signals will be transitioned correctly.
*
* Since: 2.72
*/
struct _GSignalGroup
{
GObject parent_instance;
GWeakRef target_ref;
GRecMutex mutex;
GPtrArray *handlers;
GType target_type;
gssize block_count;
guint has_bound_at_least_once : 1;
};
typedef struct _GSignalGroupClass
{
GObjectClass parent_class;
void (*bind) (GSignalGroup *self,
GObject *target);
} GSignalGroupClass;
typedef struct
{
GSignalGroup *group;
gulong handler_id;
GClosure *closure;
guint signal_id;
GQuark signal_detail;
guint connect_after : 1;
} SignalHandler;
G_DEFINE_TYPE (GSignalGroup, g_signal_group, G_TYPE_OBJECT)
typedef enum
{
PROP_TARGET = 1,
PROP_TARGET_TYPE,
LAST_PROP
} GSignalGroupProperty;
enum
{
BIND,
UNBIND,
LAST_SIGNAL
};
static GParamSpec *properties[LAST_PROP];
static guint signals[LAST_SIGNAL];
static void
g_signal_group_set_target_type (GSignalGroup *self,
GType target_type)
{
g_assert (G_IS_SIGNAL_GROUP (self));
g_assert (g_type_is_a (target_type, G_TYPE_OBJECT));
self->target_type = target_type;
/* The class must be created at least once for the signals
* to be registered, otherwise g_signal_parse_name() will fail
*/
if (G_TYPE_IS_INTERFACE (target_type))
{
if (g_type_default_interface_peek (target_type) == NULL)
g_type_default_interface_unref (g_type_default_interface_ref (target_type));
}
else
{
if (g_type_class_peek (target_type) == NULL)
g_type_class_unref (g_type_class_ref (target_type));
}
}
static void
g_signal_group_gc_handlers (GSignalGroup *self)
{
guint i;
g_assert (G_IS_SIGNAL_GROUP (self));
/*
* Remove any handlers for which the closures have become invalid. We do
* this cleanup lazily to avoid situations where we could have disposal
* active on both the signal group and the peer object.
*/
for (i = self->handlers->len; i > 0; i--)
{
const SignalHandler *handler = g_ptr_array_index (self->handlers, i - 1);
g_assert (handler != NULL);
g_assert (handler->closure != NULL);
if (handler->closure->is_invalid)
g_ptr_array_remove_index (self->handlers, i - 1);
}
}
static void
g_signal_group__target_weak_notify (gpointer data,
GObject *where_object_was)
{
GSignalGroup *self = data;
guint i;
g_assert (G_IS_SIGNAL_GROUP (self));
g_assert (where_object_was != NULL);
g_rec_mutex_lock (&self->mutex);
g_weak_ref_set (&self->target_ref, NULL);
for (i = 0; i < self->handlers->len; i++)
{
SignalHandler *handler = g_ptr_array_index (self->handlers, i);
handler->handler_id = 0;
}
g_signal_emit (self, signals[UNBIND], 0);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TARGET]);
g_rec_mutex_unlock (&self->mutex);
}
static void
g_signal_group_bind_handler (GSignalGroup *self,
SignalHandler *handler,
GObject *target)
{
gssize i;
g_assert (self != NULL);
g_assert (G_IS_OBJECT (target));
g_assert (handler != NULL);
g_assert (handler->signal_id != 0);
g_assert (handler->closure != NULL);
g_assert (handler->closure->is_invalid == 0);
g_assert (handler->handler_id == 0);
handler->handler_id = g_signal_connect_closure_by_id (target,
handler->signal_id,
handler->signal_detail,
handler->closure,
handler->connect_after);
g_assert (handler->handler_id != 0);
for (i = 0; i < self->block_count; i++)
g_signal_handler_block (target, handler->handler_id);
}
static void
g_signal_group_bind (GSignalGroup *self,
GObject *target)
{
GObject *hold;
guint i;
g_assert (G_IS_SIGNAL_GROUP (self));
g_assert (!target || G_IS_OBJECT (target));
if (target == NULL)
return;
self->has_bound_at_least_once = TRUE;
hold = g_object_ref (target);
g_weak_ref_set (&self->target_ref, hold);
g_object_weak_ref (hold, g_signal_group__target_weak_notify, self);
g_signal_group_gc_handlers (self);
for (i = 0; i < self->handlers->len; i++)
{
SignalHandler *handler = g_ptr_array_index (self->handlers, i);
g_signal_group_bind_handler (self, handler, hold);
}
g_signal_emit (self, signals [BIND], 0, hold);
g_object_unref (hold);
}
static void
g_signal_group_unbind (GSignalGroup *self)
{
GObject *target;
guint i;
g_return_if_fail (G_IS_SIGNAL_GROUP (self));
target = g_weak_ref_get (&self->target_ref);
/*
* Target may be NULL by this point, as we got notified of its destruction.
* However, if we're early enough, we may get a full reference back and can
* cleanly disconnect our connections.
*/
if (target != NULL)
{
g_weak_ref_set (&self->target_ref, NULL);
/*
* Let go of our weak reference now that we have a full reference
* for the life of this function.
*/
g_object_weak_unref (target,
g_signal_group__target_weak_notify,
self);
}
g_signal_group_gc_handlers (self);
for (i = 0; i < self->handlers->len; i++)
{
SignalHandler *handler;
gulong handler_id;
handler = g_ptr_array_index (self->handlers, i);
g_assert (handler != NULL);
g_assert (handler->signal_id != 0);
g_assert (handler->closure != NULL);
handler_id = handler->handler_id;
handler->handler_id = 0;
/*
* If @target is NULL, we lost a race to cleanup the weak
* instance and the signal connections have already been
* finalized and therefore nothing to do.
*/
if (target != NULL && handler_id != 0)
g_signal_handler_disconnect (target, handler_id);
}
g_signal_emit (self, signals [UNBIND], 0);
g_clear_object (&target);
}
static gboolean
g_signal_group_check_target_type (GSignalGroup *self,
gpointer target)
{
if ((target != NULL) &&
!g_type_is_a (G_OBJECT_TYPE (target), self->target_type))
{
g_critical ("Failed to set GSignalGroup of target type %s "
"using target %p of type %s",
g_type_name (self->target_type),
target, G_OBJECT_TYPE_NAME (target));
return FALSE;
}
return TRUE;
}
/**
* g_signal_group_block:
* @self: the #GSignalGroup
*
* Blocks all signal handlers managed by @self so they will not
* be called during any signal emissions. Must be unblocked exactly
* the same number of times it has been blocked to become active again.
*
* This blocked state will be kept across changes of the target instance.
*
* Since: 2.72
*/
void
g_signal_group_block (GSignalGroup *self)
{
GObject *target;
guint i;
g_return_if_fail (G_IS_SIGNAL_GROUP (self));
g_return_if_fail (self->block_count >= 0);
g_rec_mutex_lock (&self->mutex);
self->block_count++;
target = g_weak_ref_get (&self->target_ref);
if (target == NULL)
goto unlock;
for (i = 0; i < self->handlers->len; i++)
{
const SignalHandler *handler = g_ptr_array_index (self->handlers, i);
g_assert (handler != NULL);
g_assert (handler->signal_id != 0);
g_assert (handler->closure != NULL);
g_assert (handler->handler_id != 0);
g_signal_handler_block (target, handler->handler_id);
}
g_object_unref (target);
unlock:
g_rec_mutex_unlock (&self->mutex);
}
/**
* g_signal_group_unblock:
* @self: the #GSignalGroup
*
* Unblocks all signal handlers managed by @self so they will be
* called again during any signal emissions unless it is blocked
* again. Must be unblocked exactly the same number of times it
* has been blocked to become active again.
*
* Since: 2.72
*/
void
g_signal_group_unblock (GSignalGroup *self)
{
GObject *target;
guint i;
g_return_if_fail (G_IS_SIGNAL_GROUP (self));
g_return_if_fail (self->block_count > 0);
g_rec_mutex_lock (&self->mutex);
self->block_count--;
target = g_weak_ref_get (&self->target_ref);
if (target == NULL)
goto unlock;
for (i = 0; i < self->handlers->len; i++)
{
const SignalHandler *handler = g_ptr_array_index (self->handlers, i);
g_assert (handler != NULL);
g_assert (handler->signal_id != 0);
g_assert (handler->closure != NULL);
g_assert (handler->handler_id != 0);
g_signal_handler_unblock (target, handler->handler_id);
}
g_object_unref (target);
unlock:
g_rec_mutex_unlock (&self->mutex);
}
/**
* g_signal_group_dup_target:
* @self: the #GSignalGroup
*
* Gets the target instance used when connecting signals.
*
* Returns: (nullable) (transfer full) (type GObject): The target instance
*
* Since: 2.72
*/
gpointer
g_signal_group_dup_target (GSignalGroup *self)
{
GObject *target;
g_return_val_if_fail (G_IS_SIGNAL_GROUP (self), NULL);
g_rec_mutex_lock (&self->mutex);
target = g_weak_ref_get (&self->target_ref);
g_rec_mutex_unlock (&self->mutex);
return target;
}
/**
* g_signal_group_set_target:
* @self: the #GSignalGroup.
* @target: (nullable) (type GObject) (transfer none): The target instance used
* when connecting signals.
*
* Sets the target instance used when connecting signals. Any signal
* that has been registered with g_signal_group_connect_object() or
* similar functions will be connected to this object.
*
* If the target instance was previously set, signals will be
* disconnected from that object prior to connecting to @target.
*
* Since: 2.72
*/
void
g_signal_group_set_target (GSignalGroup *self,
gpointer target)
{
GObject *object;
g_return_if_fail (G_IS_SIGNAL_GROUP (self));
g_rec_mutex_lock (&self->mutex);
object = g_weak_ref_get (&self->target_ref);
if (object == (GObject *)target)
goto cleanup;
if (!g_signal_group_check_target_type (self, target))
goto cleanup;
/* Only emit unbind if we've ever called bind */
if (self->has_bound_at_least_once)
g_signal_group_unbind (self);
g_signal_group_bind (self, target);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TARGET]);
cleanup:
g_clear_object (&object);
g_rec_mutex_unlock (&self->mutex);
}
static void
signal_handler_free (gpointer data)
{
SignalHandler *handler = data;
if (handler->closure != NULL)
g_closure_invalidate (handler->closure);
handler->handler_id = 0;
handler->signal_id = 0;
handler->signal_detail = 0;
g_clear_pointer (&handler->closure, g_closure_unref);
g_slice_free (SignalHandler, handler);
}
static void
g_signal_group_constructed (GObject *object)
{
GSignalGroup *self = (GSignalGroup *)object;
GObject *target;
g_rec_mutex_lock (&self->mutex);
target = g_weak_ref_get (&self->target_ref);
if (!g_signal_group_check_target_type (self, target))
g_signal_group_set_target (self, NULL);
G_OBJECT_CLASS (g_signal_group_parent_class)->constructed (object);
g_clear_object (&target);
g_rec_mutex_unlock (&self->mutex);
}
static void
g_signal_group_dispose (GObject *object)
{
GSignalGroup *self = (GSignalGroup *)object;
g_rec_mutex_lock (&self->mutex);
g_signal_group_gc_handlers (self);
if (self->has_bound_at_least_once)
g_signal_group_unbind (self);
g_clear_pointer (&self->handlers, g_ptr_array_unref);
g_rec_mutex_unlock (&self->mutex);
G_OBJECT_CLASS (g_signal_group_parent_class)->dispose (object);
}
static void
g_signal_group_finalize (GObject *object)
{
GSignalGroup *self = (GSignalGroup *)object;
g_weak_ref_clear (&self->target_ref);
g_rec_mutex_clear (&self->mutex);
G_OBJECT_CLASS (g_signal_group_parent_class)->finalize (object);
}
static void
g_signal_group_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GSignalGroup *self = G_SIGNAL_GROUP (object);
switch ((GSignalGroupProperty) prop_id)
{
case PROP_TARGET:
g_value_take_object (value, g_signal_group_dup_target (self));
break;
case PROP_TARGET_TYPE:
g_value_set_gtype (value, self->target_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_signal_group_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GSignalGroup *self = G_SIGNAL_GROUP (object);
switch ((GSignalGroupProperty) prop_id)
{
case PROP_TARGET:
g_signal_group_set_target (self, g_value_get_object (value));
break;
case PROP_TARGET_TYPE:
g_signal_group_set_target_type (self, g_value_get_gtype (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_signal_group_class_init (GSignalGroupClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = g_signal_group_constructed;
object_class->dispose = g_signal_group_dispose;
object_class->finalize = g_signal_group_finalize;
object_class->get_property = g_signal_group_get_property;
object_class->set_property = g_signal_group_set_property;
/**
* GSignalGroup:target
*
* The target instance used when connecting signals.
*
* Since: 2.72
*/
properties[PROP_TARGET] =
g_param_spec_object ("target", NULL, NULL,
G_TYPE_OBJECT,
(G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
/**
* GSignalGroup:target-type
*
* The #GType of the target property.
*
* Since: 2.72
*/
properties[PROP_TARGET_TYPE] =
g_param_spec_gtype ("target-type", NULL, NULL,
G_TYPE_OBJECT,
(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, LAST_PROP, properties);
/**
* GSignalGroup::bind:
* @self: the #GSignalGroup
* @instance: a #GObject containing the new value for #GSignalGroup:target
*
* This signal is emitted when #GSignalGroup:target is set to a new value
* other than %NULL. It is similar to #GObject::notify on `target` except it
* will not emit when #GSignalGroup:target is %NULL and also allows for
* receiving the #GObject without a data-race.
*
* Since: 2.72
*/
signals[BIND] =
g_signal_new ("bind",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE,
1,
G_TYPE_OBJECT);
/**
* GSignalGroup::unbind:
* @self: a #GSignalGroup
*
* This signal is emitted when the target instance of @self is set to a
* new #GObject.
*
* This signal will only be emitted if the previous target of @self is
* non-%NULL.
*
* Since: 2.72
*/
signals[UNBIND] =
g_signal_new ("unbind",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL, NULL,
G_TYPE_NONE,
0);
}
static void
g_signal_group_init (GSignalGroup *self)
{
g_rec_mutex_init (&self->mutex);
self->handlers = g_ptr_array_new_with_free_func (signal_handler_free);
self->target_type = G_TYPE_OBJECT;
}
/**
* g_signal_group_new:
* @target_type: the #GType of the target instance.
*
* Creates a new #GSignalGroup for target instances of @target_type.
*
* Returns: (transfer full): a new #GSignalGroup
*
* Since: 2.72
*/
GSignalGroup *
g_signal_group_new (GType target_type)
{
g_return_val_if_fail (g_type_is_a (target_type, G_TYPE_OBJECT), NULL);
return g_object_new (G_TYPE_SIGNAL_GROUP,
"target-type", target_type,
NULL);
}
gobject/gsignalgroup: fix memory leaks on error Spotted by ASAN during the tests: Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7ff0b4562077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7ff0b3e8b508 in g_malloc0 ../glib/gmem.c:155 #2 0x7ff0b375052f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7ff0b375b422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7ff0b37d159e in g_signal_group_connect_full ../gobject/gsignalgroup.c:790 #5 0x7ff0b37d159e in g_signal_group_connect ../gobject/gsignalgroup.c:886 #6 0x4045d8 in test_signal_group_invalid ../gobject/tests/signalgroup.c:331 #7 0x7ff0b3f369a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7ff0b3f369a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7ff0b3f37879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7ff0b3f37995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7ff0b2de758f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7f012addf077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7f012a708508 in g_malloc0 ../glib/gmem.c:155 #2 0x7f0129fcd52f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7f0129fd8422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7f012a04e5ae in g_signal_group_connect_full ../gobject/gsignalgroup.c:791 #5 0x7f012a04e5ae in g_signal_group_connect ../gobject/gsignalgroup.c:887 #6 0x4043cc in test_signal_group_invalid ../gobject/tests/signalgroup.c:308 #7 0x7f012a7b39a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7f012a7b39a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7f012a7b4879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7f012a7b4995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7f012966458f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2022-05-17 15:21:53 +02:00
static gboolean
g_signal_group_connect_closure_ (GSignalGroup *self,
const gchar *detailed_signal,
GClosure *closure,
gboolean after)
{
GObject *target;
SignalHandler *handler;
guint signal_id;
GQuark signal_detail;
gobject/gsignalgroup: fix memory leaks on error Spotted by ASAN during the tests: Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7ff0b4562077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7ff0b3e8b508 in g_malloc0 ../glib/gmem.c:155 #2 0x7ff0b375052f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7ff0b375b422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7ff0b37d159e in g_signal_group_connect_full ../gobject/gsignalgroup.c:790 #5 0x7ff0b37d159e in g_signal_group_connect ../gobject/gsignalgroup.c:886 #6 0x4045d8 in test_signal_group_invalid ../gobject/tests/signalgroup.c:331 #7 0x7ff0b3f369a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7ff0b3f369a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7ff0b3f37879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7ff0b3f37995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7ff0b2de758f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7f012addf077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7f012a708508 in g_malloc0 ../glib/gmem.c:155 #2 0x7f0129fcd52f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7f0129fd8422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7f012a04e5ae in g_signal_group_connect_full ../gobject/gsignalgroup.c:791 #5 0x7f012a04e5ae in g_signal_group_connect ../gobject/gsignalgroup.c:887 #6 0x4043cc in test_signal_group_invalid ../gobject/tests/signalgroup.c:308 #7 0x7f012a7b39a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7f012a7b39a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7f012a7b4879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7f012a7b4995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7f012966458f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2022-05-17 15:21:53 +02:00
g_return_val_if_fail (G_IS_SIGNAL_GROUP (self), FALSE);
g_return_val_if_fail (detailed_signal != NULL, FALSE);
g_return_val_if_fail (closure != NULL, FALSE);
if (!g_signal_parse_name (detailed_signal, self->target_type,
&signal_id, &signal_detail, TRUE))
{
g_critical ("Invalid signal name “%s”", detailed_signal);
return FALSE;
}
g_rec_mutex_lock (&self->mutex);
if (self->has_bound_at_least_once)
{
g_critical ("Cannot add signals after setting target");
g_rec_mutex_unlock (&self->mutex);
gobject/gsignalgroup: fix memory leaks on error Spotted by ASAN during the tests: Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7ff0b4562077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7ff0b3e8b508 in g_malloc0 ../glib/gmem.c:155 #2 0x7ff0b375052f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7ff0b375b422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7ff0b37d159e in g_signal_group_connect_full ../gobject/gsignalgroup.c:790 #5 0x7ff0b37d159e in g_signal_group_connect ../gobject/gsignalgroup.c:886 #6 0x4045d8 in test_signal_group_invalid ../gobject/tests/signalgroup.c:331 #7 0x7ff0b3f369a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7ff0b3f369a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7ff0b3f37879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7ff0b3f37995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7ff0b2de758f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7f012addf077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7f012a708508 in g_malloc0 ../glib/gmem.c:155 #2 0x7f0129fcd52f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7f0129fd8422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7f012a04e5ae in g_signal_group_connect_full ../gobject/gsignalgroup.c:791 #5 0x7f012a04e5ae in g_signal_group_connect ../gobject/gsignalgroup.c:887 #6 0x4043cc in test_signal_group_invalid ../gobject/tests/signalgroup.c:308 #7 0x7f012a7b39a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7f012a7b39a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7f012a7b4879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7f012a7b4995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7f012966458f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2022-05-17 15:21:53 +02:00
return FALSE;
}
handler = g_slice_new0 (SignalHandler);
handler->group = self;
handler->signal_id = signal_id;
handler->signal_detail = signal_detail;
handler->closure = g_closure_ref (closure);
handler->connect_after = after;
g_closure_sink (closure);
g_ptr_array_add (self->handlers, handler);
target = g_weak_ref_get (&self->target_ref);
if (target != NULL)
{
g_signal_group_bind_handler (self, handler, target);
g_object_unref (target);
}
/* Lazily remove any old handlers on connect */
g_signal_group_gc_handlers (self);
g_rec_mutex_unlock (&self->mutex);
gobject/gsignalgroup: fix memory leaks on error Spotted by ASAN during the tests: Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7ff0b4562077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7ff0b3e8b508 in g_malloc0 ../glib/gmem.c:155 #2 0x7ff0b375052f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7ff0b375b422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7ff0b37d159e in g_signal_group_connect_full ../gobject/gsignalgroup.c:790 #5 0x7ff0b37d159e in g_signal_group_connect ../gobject/gsignalgroup.c:886 #6 0x4045d8 in test_signal_group_invalid ../gobject/tests/signalgroup.c:331 #7 0x7ff0b3f369a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7ff0b3f369a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7ff0b3f37879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7ff0b3f37995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7ff0b2de758f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7f012addf077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7f012a708508 in g_malloc0 ../glib/gmem.c:155 #2 0x7f0129fcd52f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7f0129fd8422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7f012a04e5ae in g_signal_group_connect_full ../gobject/gsignalgroup.c:791 #5 0x7f012a04e5ae in g_signal_group_connect ../gobject/gsignalgroup.c:887 #6 0x4043cc in test_signal_group_invalid ../gobject/tests/signalgroup.c:308 #7 0x7f012a7b39a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7f012a7b39a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7f012a7b4879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7f012a7b4995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7f012966458f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2022-05-17 15:21:53 +02:00
return TRUE;
}
/**
* g_signal_group_connect_closure:
* @self: a #GSignalGroup
* @detailed_signal: a string of the form `signal-name` with optional `::signal-detail`
* @closure: (not nullable): the closure to connect.
* @after: whether the handler should be called before or after the
* default handler of the signal.
*
* Connects @closure to the signal @detailed_signal on #GSignalGroup:target.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.74
*/
void
g_signal_group_connect_closure (GSignalGroup *self,
const gchar *detailed_signal,
GClosure *closure,
gboolean after)
{
g_signal_group_connect_closure_ (self, detailed_signal, closure, after);
}
static void
g_signal_group_connect_full (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data,
GClosureNotify notify,
GConnectFlags flags,
gboolean is_object)
{
GClosure *closure;
g_return_if_fail (c_handler != NULL);
g_return_if_fail (!is_object || G_IS_OBJECT (data));
if ((flags & G_CONNECT_SWAPPED) != 0)
closure = g_cclosure_new_swap (c_handler, data, notify);
else
closure = g_cclosure_new (c_handler, data, notify);
if (is_object)
{
/* Set closure->is_invalid when data is disposed. We only track this to avoid
* reconnecting in the future. However, we do a round of cleanup when ever we
* connect a new object or the target changes to GC the old handlers.
*/
g_object_watch_closure (data, closure);
}
gobject/gsignalgroup: fix memory leaks on error Spotted by ASAN during the tests: Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7ff0b4562077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7ff0b3e8b508 in g_malloc0 ../glib/gmem.c:155 #2 0x7ff0b375052f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7ff0b375b422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7ff0b37d159e in g_signal_group_connect_full ../gobject/gsignalgroup.c:790 #5 0x7ff0b37d159e in g_signal_group_connect ../gobject/gsignalgroup.c:886 #6 0x4045d8 in test_signal_group_invalid ../gobject/tests/signalgroup.c:331 #7 0x7ff0b3f369a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7ff0b3f369a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7ff0b3f364ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7ff0b3f37879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7ff0b3f37995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7ff0b2de758f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Direct leak of 72 byte(s) in 1 object(s) allocated from: #0 0x7f012addf077 in calloc (/lib64/libasan.so.8+0xba077) #1 0x7f012a708508 in g_malloc0 ../glib/gmem.c:155 #2 0x7f0129fcd52f in g_closure_new_simple ../gobject/gclosure.c:220 #3 0x7f0129fd8422 in g_cclosure_new ../gobject/gclosure.c:976 #4 0x7f012a04e5ae in g_signal_group_connect_full ../gobject/gsignalgroup.c:791 #5 0x7f012a04e5ae in g_signal_group_connect ../gobject/gsignalgroup.c:887 #6 0x4043cc in test_signal_group_invalid ../gobject/tests/signalgroup.c:308 #7 0x7f012a7b39a5 in test_case_run ../glib/gtestutils.c:2930 #8 0x7f012a7b39a5 in g_test_run_suite_internal ../glib/gtestutils.c:3018 #9 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #10 0x7f012a7b34ed in g_test_run_suite_internal ../glib/gtestutils.c:3035 #11 0x7f012a7b4879 in g_test_run_suite ../glib/gtestutils.c:3112 #12 0x7f012a7b4995 in g_test_run ../glib/gtestutils.c:2231 #13 0x40253c in main ../gobject/tests/signalgroup.c:664 #14 0x7f012966458f in __libc_start_call_main (/lib64/libc.so.6+0x2d58f) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2022-05-17 15:21:53 +02:00
if (!g_signal_group_connect_closure_ (self,
detailed_signal,
closure,
(flags & G_CONNECT_AFTER) != 0))
g_closure_unref (closure);
}
/**
* g_signal_group_connect_object: (skip)
* @self: a #GSignalGroup
* @detailed_signal: a string of the form `signal-name` with optional `::signal-detail`
* @c_handler: (scope notified): the #GCallback to connect
* @object: (not nullable) (transfer none): the #GObject to pass as data to @c_handler calls
* @flags: #GConnectFlags for the signal connection
*
* Connects @c_handler to the signal @detailed_signal on #GSignalGroup:target.
*
* Ensures that the @object stays alive during the call to @c_handler
* by temporarily adding a reference count. When the @object is destroyed
* the signal handler will automatically be removed.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.72
*/
void
g_signal_group_connect_object (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer object,
GConnectFlags flags)
{
g_return_if_fail (G_IS_OBJECT (object));
g_signal_group_connect_full (self, detailed_signal, c_handler, object, NULL,
flags, TRUE);
}
/**
* g_signal_group_connect_data:
* @self: a #GSignalGroup
* @detailed_signal: a string of the form "signal-name::detail"
* @c_handler: (scope notified) (closure data) (destroy notify): the #GCallback to connect
* @data: the data to pass to @c_handler calls
* @notify: function to be called when disposing of @self
* @flags: the flags used to create the signal connection
*
* Connects @c_handler to the signal @detailed_signal
* on the target instance of @self.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.72
*/
void
g_signal_group_connect_data (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data,
GClosureNotify notify,
GConnectFlags flags)
{
g_signal_group_connect_full (self, detailed_signal, c_handler, data, notify,
flags, FALSE);
}
/**
* g_signal_group_connect: (skip)
* @self: a #GSignalGroup
* @detailed_signal: a string of the form "signal-name::detail"
* @c_handler: (scope notified): the #GCallback to connect
* @data: the data to pass to @c_handler calls
*
* Connects @c_handler to the signal @detailed_signal
* on the target instance of @self.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.72
*/
void
g_signal_group_connect (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data)
{
g_signal_group_connect_full (self, detailed_signal, c_handler, data, NULL,
0, FALSE);
}
/**
* g_signal_group_connect_after: (skip)
* @self: a #GSignalGroup
* @detailed_signal: a string of the form "signal-name::detail"
* @c_handler: (scope notified): the #GCallback to connect
* @data: the data to pass to @c_handler calls
*
* Connects @c_handler to the signal @detailed_signal
* on the target instance of @self.
*
* The @c_handler will be called after the default handler of the signal.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.72
*/
void
g_signal_group_connect_after (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data)
{
g_signal_group_connect_full (self, detailed_signal, c_handler,
data, NULL, G_CONNECT_AFTER, FALSE);
}
/**
* g_signal_group_connect_swapped:
* @self: a #GSignalGroup
* @detailed_signal: a string of the form "signal-name::detail"
* @c_handler: (scope async): the #GCallback to connect
* @data: the data to pass to @c_handler calls
*
* Connects @c_handler to the signal @detailed_signal
* on the target instance of @self.
*
* The instance on which the signal is emitted and @data
* will be swapped when calling @c_handler.
*
* You cannot connect a signal handler after #GSignalGroup:target has been set.
*
* Since: 2.72
*/
void
g_signal_group_connect_swapped (GSignalGroup *self,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data)
{
g_signal_group_connect_full (self, detailed_signal, c_handler, data, NULL,
G_CONNECT_SWAPPED, FALSE);
}