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glib/gio/gdbusinterfaceskeleton.c
Philip Withnall 74250cd9c9 gio: Drop unnecessary volatile qualifiers from internal variables 
These variables were already (correctly) accessed atomically. The
`volatile` qualifier doesn’t help with that.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #600
2020-11-20 14:40:19 +00:00

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/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* 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/>.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include "config.h"
#include "gdbusinterface.h"
#include "gdbusinterfaceskeleton.h"
#include "gdbusobjectskeleton.h"
#include "gioenumtypes.h"
#include "gdbusprivate.h"
#include "gdbusmethodinvocation.h"
#include "gdbusconnection.h"
#include "gmarshal-internal.h"
#include "gtask.h"
#include "gioerror.h"
#include "glibintl.h"
/**
* SECTION:gdbusinterfaceskeleton
* @short_description: Service-side D-Bus interface
* @include: gio/gio.h
*
* Abstract base class for D-Bus interfaces on the service side.
*/
struct _GDBusInterfaceSkeletonPrivate
{
GMutex lock;
GDBusObject *object;
GDBusInterfaceSkeletonFlags flags;
GSList *connections; /* List of ConnectionData */
gchar *object_path; /* The object path for this skeleton */
GDBusInterfaceVTable *hooked_vtable;
};
typedef struct
{
GDBusConnection *connection;
guint registration_id;
} ConnectionData;
enum
{
G_AUTHORIZE_METHOD_SIGNAL,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_G_FLAGS
};
static guint signals[LAST_SIGNAL] = {0};
static void dbus_interface_interface_init (GDBusInterfaceIface *iface);
static void set_object_path_locked (GDBusInterfaceSkeleton *interface_,
const gchar *object_path);
static void remove_connection_locked (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection);
static void skeleton_intercept_handle_method_call (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data);
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GDBusInterfaceSkeleton, g_dbus_interface_skeleton, G_TYPE_OBJECT,
G_ADD_PRIVATE (GDBusInterfaceSkeleton)
G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_INTERFACE, dbus_interface_interface_init))
static void
g_dbus_interface_skeleton_finalize (GObject *object)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (object);
/* Hold the lock just in case any code we call verifies that the lock is held */
g_mutex_lock (&interface->priv->lock);
/* unexport from all connections if we're exported anywhere */
while (interface->priv->connections != NULL)
{
ConnectionData *data = interface->priv->connections->data;
remove_connection_locked (interface, data->connection);
}
set_object_path_locked (interface, NULL);
g_mutex_unlock (&interface->priv->lock);
g_free (interface->priv->hooked_vtable);
if (interface->priv->object != NULL)
g_object_remove_weak_pointer (G_OBJECT (interface->priv->object), (gpointer *) &interface->priv->object);
g_mutex_clear (&interface->priv->lock);
G_OBJECT_CLASS (g_dbus_interface_skeleton_parent_class)->finalize (object);
}
static void
g_dbus_interface_skeleton_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (object);
switch (prop_id)
{
case PROP_G_FLAGS:
g_value_set_flags (value, g_dbus_interface_skeleton_get_flags (interface));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_dbus_interface_skeleton_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (object);
switch (prop_id)
{
case PROP_G_FLAGS:
g_dbus_interface_skeleton_set_flags (interface, g_value_get_flags (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
g_dbus_interface_skeleton_g_authorize_method_default (GDBusInterfaceSkeleton *interface,
GDBusMethodInvocation *invocation)
{
return TRUE;
}
static void
g_dbus_interface_skeleton_class_init (GDBusInterfaceSkeletonClass *klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = g_dbus_interface_skeleton_finalize;
gobject_class->set_property = g_dbus_interface_skeleton_set_property;
gobject_class->get_property = g_dbus_interface_skeleton_get_property;
klass->g_authorize_method = g_dbus_interface_skeleton_g_authorize_method_default;
/**
* GDBusInterfaceSkeleton:g-flags:
*
* Flags from the #GDBusInterfaceSkeletonFlags enumeration.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_G_FLAGS,
g_param_spec_flags ("g-flags",
"g-flags",
"Flags for the interface skeleton",
G_TYPE_DBUS_INTERFACE_SKELETON_FLAGS,
G_DBUS_INTERFACE_SKELETON_FLAGS_NONE,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_STATIC_STRINGS));
/**
* GDBusInterfaceSkeleton::g-authorize-method:
* @interface: The #GDBusInterfaceSkeleton emitting the signal.
* @invocation: A #GDBusMethodInvocation.
*
* Emitted when a method is invoked by a remote caller and used to
* determine if the method call is authorized.
*
* Note that this signal is emitted in a thread dedicated to
* handling the method call so handlers are allowed to perform
* blocking IO. This means that it is appropriate to call e.g.
* [polkit_authority_check_authorization_sync()](http://hal.freedesktop.org/docs/polkit/PolkitAuthority.html#polkit-authority-check-authorization-sync)
* with the
* [POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION](http://hal.freedesktop.org/docs/polkit/PolkitAuthority.html#POLKIT-CHECK-AUTHORIZATION-FLAGS-ALLOW-USER-INTERACTION:CAPS)
* flag set.
*
* If %FALSE is returned then no further handlers are run and the
* signal handler must take a reference to @invocation and finish
* handling the call (e.g. return an error via
* g_dbus_method_invocation_return_error()).
*
* Otherwise, if %TRUE is returned, signal emission continues. If no
* handlers return %FALSE, then the method is dispatched. If
* @interface has an enclosing #GDBusObjectSkeleton, then the
* #GDBusObjectSkeleton::authorize-method signal handlers run before
* the handlers for this signal.
*
* The default class handler just returns %TRUE.
*
* Please note that the common case is optimized: if no signals
* handlers are connected and the default class handler isn't
* overridden (for both @interface and the enclosing
* #GDBusObjectSkeleton, if any) and #GDBusInterfaceSkeleton:g-flags does
* not have the
* %G_DBUS_INTERFACE_SKELETON_FLAGS_HANDLE_METHOD_INVOCATIONS_IN_THREAD
* flags set, no dedicated thread is ever used and the call will be
* handled in the same thread as the object that @interface belongs
* to was exported in.
*
* Returns: %TRUE if the call is authorized, %FALSE otherwise.
*
* Since: 2.30
*/
signals[G_AUTHORIZE_METHOD_SIGNAL] =
g_signal_new (I_("g-authorize-method"),
G_TYPE_DBUS_INTERFACE_SKELETON,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusInterfaceSkeletonClass, g_authorize_method),
_g_signal_accumulator_false_handled,
NULL,
_g_cclosure_marshal_BOOLEAN__OBJECT,
G_TYPE_BOOLEAN,
1,
G_TYPE_DBUS_METHOD_INVOCATION);
g_signal_set_va_marshaller (signals[G_AUTHORIZE_METHOD_SIGNAL],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_BOOLEAN__OBJECTv);
}
static void
g_dbus_interface_skeleton_init (GDBusInterfaceSkeleton *interface)
{
interface->priv = g_dbus_interface_skeleton_get_instance_private (interface);
g_mutex_init (&interface->priv->lock);
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_interface_skeleton_get_flags:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets the #GDBusInterfaceSkeletonFlags that describes what the behavior
* of @interface_
*
* Returns: One or more flags from the #GDBusInterfaceSkeletonFlags enumeration.
*
* Since: 2.30
*/
GDBusInterfaceSkeletonFlags
g_dbus_interface_skeleton_get_flags (GDBusInterfaceSkeleton *interface_)
{
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), G_DBUS_INTERFACE_SKELETON_FLAGS_NONE);
return interface_->priv->flags;
}
/**
* g_dbus_interface_skeleton_set_flags:
* @interface_: A #GDBusInterfaceSkeleton.
* @flags: Flags from the #GDBusInterfaceSkeletonFlags enumeration.
*
* Sets flags describing what the behavior of @skeleton should be.
*
* Since: 2.30
*/
void
g_dbus_interface_skeleton_set_flags (GDBusInterfaceSkeleton *interface_,
GDBusInterfaceSkeletonFlags flags)
{
g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_));
g_mutex_lock (&interface_->priv->lock);
if (interface_->priv->flags != flags)
{
interface_->priv->flags = flags;
g_mutex_unlock (&interface_->priv->lock);
g_object_notify (G_OBJECT (interface_), "g-flags");
}
else
{
g_mutex_unlock (&interface_->priv->lock);
}
}
/**
* g_dbus_interface_skeleton_get_info:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets D-Bus introspection information for the D-Bus interface
* implemented by @interface_.
*
* Returns: (transfer none): A #GDBusInterfaceInfo (never %NULL). Do not free.
*
* Since: 2.30
*/
GDBusInterfaceInfo *
g_dbus_interface_skeleton_get_info (GDBusInterfaceSkeleton *interface_)
{
GDBusInterfaceInfo *ret;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
ret = G_DBUS_INTERFACE_SKELETON_GET_CLASS (interface_)->get_info (interface_);
g_warn_if_fail (ret != NULL);
return ret;
}
/**
* g_dbus_interface_skeleton_get_vtable: (skip)
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets the interface vtable for the D-Bus interface implemented by
* @interface_. The returned function pointers should expect @interface_
* itself to be passed as @user_data.
*
* Returns: A #GDBusInterfaceVTable (never %NULL).
*
* Since: 2.30
*/
GDBusInterfaceVTable *
g_dbus_interface_skeleton_get_vtable (GDBusInterfaceSkeleton *interface_)
{
GDBusInterfaceVTable *ret;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
ret = G_DBUS_INTERFACE_SKELETON_GET_CLASS (interface_)->get_vtable (interface_);
g_warn_if_fail (ret != NULL);
return ret;
}
/**
* g_dbus_interface_skeleton_get_properties:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets all D-Bus properties for @interface_.
*
* Returns: (transfer full): A #GVariant of type
* ['a{sv}'][G-VARIANT-TYPE-VARDICT:CAPS].
* Free with g_variant_unref().
*
* Since: 2.30
*/
GVariant *
g_dbus_interface_skeleton_get_properties (GDBusInterfaceSkeleton *interface_)
{
GVariant *ret;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
ret = G_DBUS_INTERFACE_SKELETON_GET_CLASS (interface_)->get_properties (interface_);
return g_variant_take_ref (ret);
}
/**
* g_dbus_interface_skeleton_flush:
* @interface_: A #GDBusInterfaceSkeleton.
*
* If @interface_ has outstanding changes, request for these changes to be
* emitted immediately.
*
* For example, an exported D-Bus interface may queue up property
* changes and emit the
* `org.freedesktop.DBus.Properties.PropertiesChanged`
* signal later (e.g. in an idle handler). This technique is useful
* for collapsing multiple property changes into one.
*
* Since: 2.30
*/
void
g_dbus_interface_skeleton_flush (GDBusInterfaceSkeleton *interface_)
{
g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_));
G_DBUS_INTERFACE_SKELETON_GET_CLASS (interface_)->flush (interface_);
}
/* ---------------------------------------------------------------------------------------------------- */
static GDBusInterfaceInfo *
_g_dbus_interface_skeleton_get_info (GDBusInterface *interface_)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (interface_);
return g_dbus_interface_skeleton_get_info (interface);
}
static GDBusObject *
g_dbus_interface_skeleton_get_object (GDBusInterface *interface_)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (interface_);
GDBusObject *ret;
g_mutex_lock (&interface->priv->lock);
ret = interface->priv->object;
g_mutex_unlock (&interface->priv->lock);
return ret;
}
static GDBusObject *
g_dbus_interface_skeleton_dup_object (GDBusInterface *interface_)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (interface_);
GDBusObject *ret;
g_mutex_lock (&interface->priv->lock);
ret = interface->priv->object;
if (ret != NULL)
g_object_ref (ret);
g_mutex_unlock (&interface->priv->lock);
return ret;
}
static void
g_dbus_interface_skeleton_set_object (GDBusInterface *interface_,
GDBusObject *object)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (interface_);
g_mutex_lock (&interface->priv->lock);
if (interface->priv->object != NULL)
g_object_remove_weak_pointer (G_OBJECT (interface->priv->object), (gpointer *) &interface->priv->object);
interface->priv->object = object;
if (object != NULL)
g_object_add_weak_pointer (G_OBJECT (interface->priv->object), (gpointer *) &interface->priv->object);
g_mutex_unlock (&interface->priv->lock);
}
static void
dbus_interface_interface_init (GDBusInterfaceIface *iface)
{
iface->get_info = _g_dbus_interface_skeleton_get_info;
iface->get_object = g_dbus_interface_skeleton_get_object;
iface->dup_object = g_dbus_interface_skeleton_dup_object;
iface->set_object = g_dbus_interface_skeleton_set_object;
}
/* ---------------------------------------------------------------------------------------------------- */
typedef struct
{
gint ref_count; /* (atomic) */
GDBusInterfaceSkeleton *interface;
GDBusInterfaceMethodCallFunc method_call_func;
GDBusMethodInvocation *invocation;
} DispatchData;
static void
dispatch_data_unref (DispatchData *data)
{
if (g_atomic_int_dec_and_test (&data->ref_count))
g_slice_free (DispatchData, data);
}
static DispatchData *
dispatch_data_ref (DispatchData *data)
{
g_atomic_int_inc (&data->ref_count);
return data;
}
static gboolean
dispatch_invoke_in_context_func (gpointer user_data)
{
DispatchData *data = user_data;
data->method_call_func (g_dbus_method_invocation_get_connection (data->invocation),
g_dbus_method_invocation_get_sender (data->invocation),
g_dbus_method_invocation_get_object_path (data->invocation),
g_dbus_method_invocation_get_interface_name (data->invocation),
g_dbus_method_invocation_get_method_name (data->invocation),
g_dbus_method_invocation_get_parameters (data->invocation),
data->invocation,
g_dbus_method_invocation_get_user_data (data->invocation));
return FALSE;
}
static void
dispatch_in_thread_func (GTask *task,
gpointer source_object,
gpointer task_data,
GCancellable *cancellable)
{
DispatchData *data = task_data;
GDBusInterfaceSkeletonFlags flags;
GDBusObject *object;
gboolean authorized;
g_mutex_lock (&data->interface->priv->lock);
flags = data->interface->priv->flags;
object = data->interface->priv->object;
if (object != NULL)
g_object_ref (object);
g_mutex_unlock (&data->interface->priv->lock);
/* first check on the enclosing object (if any), then the interface */
authorized = TRUE;
if (object != NULL)
{
g_signal_emit_by_name (object,
"authorize-method",
data->interface,
data->invocation,
&authorized);
}
if (authorized)
{
g_signal_emit (data->interface,
signals[G_AUTHORIZE_METHOD_SIGNAL],
0,
data->invocation,
&authorized);
}
if (authorized)
{
gboolean run_in_thread;
run_in_thread = (flags & G_DBUS_INTERFACE_SKELETON_FLAGS_HANDLE_METHOD_INVOCATIONS_IN_THREAD);
if (run_in_thread)
{
/* might as well just re-use the existing thread */
data->method_call_func (g_dbus_method_invocation_get_connection (data->invocation),
g_dbus_method_invocation_get_sender (data->invocation),
g_dbus_method_invocation_get_object_path (data->invocation),
g_dbus_method_invocation_get_interface_name (data->invocation),
g_dbus_method_invocation_get_method_name (data->invocation),
g_dbus_method_invocation_get_parameters (data->invocation),
data->invocation,
g_dbus_method_invocation_get_user_data (data->invocation));
}
else
{
/* bah, back to original context */
g_main_context_invoke_full (g_task_get_context (task),
g_task_get_priority (task),
dispatch_invoke_in_context_func,
dispatch_data_ref (data),
(GDestroyNotify) dispatch_data_unref);
}
}
else
{
/* do nothing */
}
if (object != NULL)
g_object_unref (object);
}
static void
g_dbus_interface_method_dispatch_helper (GDBusInterfaceSkeleton *interface,
GDBusInterfaceMethodCallFunc method_call_func,
GDBusMethodInvocation *invocation)
{
gboolean has_handlers;
gboolean has_default_class_handler;
gboolean emit_authorized_signal;
gboolean run_in_thread;
GDBusInterfaceSkeletonFlags flags;
GDBusObject *object;
g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface));
g_return_if_fail (method_call_func != NULL);
g_return_if_fail (G_IS_DBUS_METHOD_INVOCATION (invocation));
g_mutex_lock (&interface->priv->lock);
flags = interface->priv->flags;
object = interface->priv->object;
if (object != NULL)
g_object_ref (object);
g_mutex_unlock (&interface->priv->lock);
/* optimization for the common case where
*
* a) no handler is connected and class handler is not overridden (both interface and object); and
* b) method calls are not dispatched in a thread
*/
has_handlers = g_signal_has_handler_pending (interface,
signals[G_AUTHORIZE_METHOD_SIGNAL],
0,
TRUE);
has_default_class_handler = (G_DBUS_INTERFACE_SKELETON_GET_CLASS (interface)->g_authorize_method ==
g_dbus_interface_skeleton_g_authorize_method_default);
emit_authorized_signal = (has_handlers || !has_default_class_handler);
if (!emit_authorized_signal)
{
if (object != NULL)
emit_authorized_signal = _g_dbus_object_skeleton_has_authorize_method_handlers (G_DBUS_OBJECT_SKELETON (object));
}
run_in_thread = (flags & G_DBUS_INTERFACE_SKELETON_FLAGS_HANDLE_METHOD_INVOCATIONS_IN_THREAD);
if (!emit_authorized_signal && !run_in_thread)
{
method_call_func (g_dbus_method_invocation_get_connection (invocation),
g_dbus_method_invocation_get_sender (invocation),
g_dbus_method_invocation_get_object_path (invocation),
g_dbus_method_invocation_get_interface_name (invocation),
g_dbus_method_invocation_get_method_name (invocation),
g_dbus_method_invocation_get_parameters (invocation),
invocation,
g_dbus_method_invocation_get_user_data (invocation));
}
else
{
GTask *task;
DispatchData *data;
data = g_slice_new0 (DispatchData);
data->interface = interface;
data->method_call_func = method_call_func;
data->invocation = invocation;
data->ref_count = 1;
task = g_task_new (interface, NULL, NULL, NULL);
g_task_set_source_tag (task, g_dbus_interface_method_dispatch_helper);
g_task_set_name (task, "[gio] D-Bus interface method dispatch");
g_task_set_task_data (task, data, (GDestroyNotify) dispatch_data_unref);
g_task_run_in_thread (task, dispatch_in_thread_func);
g_object_unref (task);
}
if (object != NULL)
g_object_unref (object);
}
static void
skeleton_intercept_handle_method_call (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
GDBusInterfaceSkeleton *interface = G_DBUS_INTERFACE_SKELETON (user_data);
g_dbus_interface_method_dispatch_helper (interface,
g_dbus_interface_skeleton_get_vtable (interface)->method_call,
invocation);
}
/* ---------------------------------------------------------------------------------------------------- */
static ConnectionData *
new_connection (GDBusConnection *connection,
guint registration_id)
{
ConnectionData *data;
data = g_slice_new0 (ConnectionData);
data->connection = g_object_ref (connection);
data->registration_id = registration_id;
return data;
}
static void
free_connection (ConnectionData *data)
{
if (data != NULL)
{
g_object_unref (data->connection);
g_slice_free (ConnectionData, data);
}
}
static gboolean
add_connection_locked (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection,
GError **error)
{
ConnectionData *data;
guint registration_id;
gboolean ret = FALSE;
if (interface_->priv->hooked_vtable == NULL)
{
/* Hook the vtable since we need to intercept method calls for
* ::g-authorize-method and for dispatching in thread vs
* context
*
* We need to wait until subclasses have had time to initialize
* properly before building the hooked_vtable, so we create it
* once at the last minute.
*/
interface_->priv->hooked_vtable = g_memdup (g_dbus_interface_skeleton_get_vtable (interface_), sizeof (GDBusInterfaceVTable));
interface_->priv->hooked_vtable->method_call = skeleton_intercept_handle_method_call;
}
registration_id = g_dbus_connection_register_object (connection,
interface_->priv->object_path,
g_dbus_interface_skeleton_get_info (interface_),
interface_->priv->hooked_vtable,
interface_,
NULL, /* user_data_free_func */
error);
if (registration_id > 0)
{
data = new_connection (connection, registration_id);
interface_->priv->connections = g_slist_append (interface_->priv->connections, data);
ret = TRUE;
}
return ret;
}
static void
remove_connection_locked (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection)
{
ConnectionData *data;
GSList *l;
/* Get the connection in the list and unregister ... */
for (l = interface_->priv->connections; l != NULL; l = l->next)
{
data = l->data;
if (data->connection == connection)
{
g_warn_if_fail (g_dbus_connection_unregister_object (data->connection, data->registration_id));
free_connection (data);
interface_->priv->connections = g_slist_delete_link (interface_->priv->connections, l);
/* we are guaranteed that the connection is only added once, so bail out early */
goto out;
}
}
out:
;
}
static void
set_object_path_locked (GDBusInterfaceSkeleton *interface_,
const gchar *object_path)
{
if (g_strcmp0 (interface_->priv->object_path, object_path) != 0)
{
g_free (interface_->priv->object_path);
interface_->priv->object_path = g_strdup (object_path);
}
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_interface_skeleton_get_connection:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets the first connection that @interface_ is exported on, if any.
*
* Returns: (nullable) (transfer none): A #GDBusConnection or %NULL if @interface_ is
* not exported anywhere. Do not free, the object belongs to @interface_.
*
* Since: 2.30
*/
GDBusConnection *
g_dbus_interface_skeleton_get_connection (GDBusInterfaceSkeleton *interface_)
{
ConnectionData *data;
GDBusConnection *ret;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
g_mutex_lock (&interface_->priv->lock);
ret = NULL;
if (interface_->priv->connections != NULL)
{
data = interface_->priv->connections->data;
if (data != NULL)
ret = data->connection;
}
g_mutex_unlock (&interface_->priv->lock);
return ret;
}
/**
* g_dbus_interface_skeleton_get_connections:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets a list of the connections that @interface_ is exported on.
*
* Returns: (element-type GDBusConnection) (transfer full): A list of
* all the connections that @interface_ is exported on. The returned
* list should be freed with g_list_free() after each element has
* been freed with g_object_unref().
*
* Since: 2.32
*/
GList *
g_dbus_interface_skeleton_get_connections (GDBusInterfaceSkeleton *interface_)
{
GList *connections;
GSList *l;
ConnectionData *data;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
g_mutex_lock (&interface_->priv->lock);
connections = NULL;
for (l = interface_->priv->connections; l != NULL; l = l->next)
{
data = l->data;
connections = g_list_prepend (connections,
/* Return a reference to each connection */
g_object_ref (data->connection));
}
g_mutex_unlock (&interface_->priv->lock);
return g_list_reverse (connections);
}
/**
* g_dbus_interface_skeleton_has_connection:
* @interface_: A #GDBusInterfaceSkeleton.
* @connection: A #GDBusConnection.
*
* Checks if @interface_ is exported on @connection.
*
* Returns: %TRUE if @interface_ is exported on @connection, %FALSE otherwise.
*
* Since: 2.32
*/
gboolean
g_dbus_interface_skeleton_has_connection (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection)
{
GSList *l;
gboolean ret = FALSE;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), FALSE);
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
g_mutex_lock (&interface_->priv->lock);
for (l = interface_->priv->connections; l != NULL; l = l->next)
{
ConnectionData *data = l->data;
if (data->connection == connection)
{
ret = TRUE;
goto out;
}
}
out:
g_mutex_unlock (&interface_->priv->lock);
return ret;
}
/**
* g_dbus_interface_skeleton_get_object_path:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Gets the object path that @interface_ is exported on, if any.
*
* Returns: (nullable): A string owned by @interface_ or %NULL if @interface_ is not exported
* anywhere. Do not free, the string belongs to @interface_.
*
* Since: 2.30
*/
const gchar *
g_dbus_interface_skeleton_get_object_path (GDBusInterfaceSkeleton *interface_)
{
const gchar *ret;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), NULL);
g_mutex_lock (&interface_->priv->lock);
ret = interface_->priv->object_path;
g_mutex_unlock (&interface_->priv->lock);
return ret;
}
/**
* g_dbus_interface_skeleton_export:
* @interface_: The D-Bus interface to export.
* @connection: A #GDBusConnection to export @interface_ on.
* @object_path: The path to export the interface at.
* @error: Return location for error or %NULL.
*
* Exports @interface_ at @object_path on @connection.
*
* This can be called multiple times to export the same @interface_
* onto multiple connections however the @object_path provided must be
* the same for all connections.
*
* Use g_dbus_interface_skeleton_unexport() to unexport the object.
*
* Returns: %TRUE if the interface was exported on @connection, otherwise %FALSE with
* @error set.
*
* Since: 2.30
*/
gboolean
g_dbus_interface_skeleton_export (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection,
const gchar *object_path,
GError **error)
{
gboolean ret = FALSE;
g_return_val_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_), FALSE);
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), FALSE);
g_return_val_if_fail (g_variant_is_object_path (object_path), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
/* Assert that the object path is the same for multiple connections here */
g_return_val_if_fail (interface_->priv->object_path == NULL ||
g_strcmp0 (interface_->priv->object_path, object_path) == 0, FALSE);
g_mutex_lock (&interface_->priv->lock);
/* Set the object path */
set_object_path_locked (interface_, object_path);
/* Add the connection */
ret = add_connection_locked (interface_, connection, error);
g_mutex_unlock (&interface_->priv->lock);
return ret;
}
/**
* g_dbus_interface_skeleton_unexport:
* @interface_: A #GDBusInterfaceSkeleton.
*
* Stops exporting @interface_ on all connections it is exported on.
*
* To unexport @interface_ from only a single connection, use
* g_dbus_interface_skeleton_unexport_from_connection()
*
* Since: 2.30
*/
void
g_dbus_interface_skeleton_unexport (GDBusInterfaceSkeleton *interface_)
{
g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_));
g_return_if_fail (interface_->priv->connections != NULL);
g_mutex_lock (&interface_->priv->lock);
g_assert (interface_->priv->object_path != NULL);
g_assert (interface_->priv->hooked_vtable != NULL);
/* Remove all connections */
while (interface_->priv->connections != NULL)
{
ConnectionData *data = interface_->priv->connections->data;
remove_connection_locked (interface_, data->connection);
}
/* Unset the object path since there are no connections left */
set_object_path_locked (interface_, NULL);
g_mutex_unlock (&interface_->priv->lock);
}
/**
* g_dbus_interface_skeleton_unexport_from_connection:
* @interface_: A #GDBusInterfaceSkeleton.
* @connection: A #GDBusConnection.
*
* Stops exporting @interface_ on @connection.
*
* To stop exporting on all connections the interface is exported on,
* use g_dbus_interface_skeleton_unexport().
*
* Since: 2.32
*/
void
g_dbus_interface_skeleton_unexport_from_connection (GDBusInterfaceSkeleton *interface_,
GDBusConnection *connection)
{
g_return_if_fail (G_IS_DBUS_INTERFACE_SKELETON (interface_));
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
g_return_if_fail (interface_->priv->connections != NULL);
g_mutex_lock (&interface_->priv->lock);
g_assert (interface_->priv->object_path != NULL);
g_assert (interface_->priv->hooked_vtable != NULL);
remove_connection_locked (interface_, connection);
/* Reset the object path if we removed the last connection */
if (interface_->priv->connections == NULL)
set_object_path_locked (interface_, NULL);
g_mutex_unlock (&interface_->priv->lock);
}
/* ---------------------------------------------------------------------------------------------------- */
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