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gio: Add GCancellableChild, a GCancellable with a GCancellable parent
Many times we need to manage multiple async operations inside an object and each operation may need to be controlled via a different GCancellable, however this implies keeping track of all of them. It's instead at times convenient to just create a main object cancellable to control a chain of GCancellable's that depend on it. As per this introduce a GCancellable subtype that requires a parent GCancellable object that is monitored for cancellation. As per the way GCancellable's "cancelled" signal is defined we need to disconnect on it outside the actual callback and we use an idle for that. We avoid keeping references in the involved objects so in case the idle functions may just do nothing.
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gio/gcancellablechild.c
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338
gio/gcancellablechild.c
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@ -0,0 +1,338 @@
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2022 Canonical Ltd.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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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 2.1 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
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Marco Trevisan <marco.trevisan@canonical.com>
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*/
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#include "config.h"
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#include "gcancellablechild.h"
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#include "glibintl.h"
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/**
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* SECTION:gcancellablechild
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* @short_description: Thread-safe Operation Cancellation Stack
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* @include: gio/gio.h
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*
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* GCancellableChild is an implementation of #GCancellable that allows to
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* monitor a parent cancellable to allow cancellation of synchronous and
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* asynchronous operations when the parent cancellable gets cancelled.
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*
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* This allows to safely create a chain of cancellable's that are depending
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* on a main #GCancellable cancellation.
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*
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* So for instance an object may hold a global cancellable to be cancelled
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* when the object gets cancelled, while creating new child cancellable's
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* for each single operation it needs to do that are depending on the
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* main #GCancellable.
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*/
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typedef struct
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{
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GCancellableClass parent_class;
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} GCancellableChildClass;
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typedef struct {
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GCancellableChild *self; /* atomic */
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gulong id;
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} ConnectionData;
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struct _GCancellableChild
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{
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GCancellable parent_instance;
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GCancellable *parent_cancellable;
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ConnectionData *connection_data;
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};
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enum
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{
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PROP_0,
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PROP_PARENT,
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};
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G_DEFINE_FINAL_TYPE (GCancellableChild, g_cancellable_child, G_TYPE_CANCELLABLE)
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static void
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connection_data_free (ConnectionData *data)
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{
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g_atomic_pointer_set (&data->self, NULL);
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g_free (data);
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}
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typedef struct {
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GWeakRef cancellable_ref;
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gulong connection_id;
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} IdleData;
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static void
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idle_data_free (IdleData *data)
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{
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g_weak_ref_clear (&data->cancellable_ref);
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g_free (data);
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}
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static gboolean
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on_parent_cancellable_cancel_idle (IdleData *idle_data)
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{
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GCancellable *cancellable = g_weak_ref_get (&idle_data->cancellable_ref);
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if (cancellable)
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{
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g_cancellable_disconnect (cancellable, idle_data->connection_id);
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g_object_unref (cancellable);
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}
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return G_SOURCE_REMOVE;
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}
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static void
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disconnect_from_parent_idle (GCancellable *parent,
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gulong connection_id)
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{
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IdleData *idle_data = g_new0 (IdleData, 1);
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GSource *source = g_idle_source_new ();
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g_weak_ref_init (&idle_data->cancellable_ref, parent);
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idle_data->connection_id = connection_id;
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g_source_set_priority (source, G_PRIORITY_HIGH_IDLE);
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g_source_set_callback (source,
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G_SOURCE_FUNC (on_parent_cancellable_cancel_idle),
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idle_data,
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(GDestroyNotify) idle_data_free);
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g_source_set_static_name (source, "[gio] cancellable_child_disconnect_idle");
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g_source_attach (source, g_main_context_get_thread_default ());
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g_source_unref (source);
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}
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static void
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on_parent_cancellable_cancelled (GCancellable *parent_cancellable,
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gpointer data)
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{
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ConnectionData *connection_data = data;
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GCancellableChild *self = NULL;
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/* Let's avoid that any other thread may dispose us while processing this */
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g_set_object (&self, g_atomic_pointer_exchange (&connection_data->self, NULL));
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if (self &&
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g_atomic_pointer_compare_and_exchange (&self->connection_data,
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connection_data, NULL))
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{
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/* Cancellable may have been got cancelled in another thread, so we need
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* to ensure that we act once the cancellable has been released.
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*/
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disconnect_from_parent_idle (parent_cancellable, connection_data->id);
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g_cancellable_cancel (G_CANCELLABLE (self));
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}
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g_clear_object (&self);
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}
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/**
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* g_cancellable_child_new:
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* @parent: the parent #GCancellable to use
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*
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* Creates a new #GCancellableChild object with a @parent as
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* parent cancellable that will be monitored for cancellation.
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*
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* If @parent is already cancelled, the newly created cancellable will
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* be cancelled immediately.
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*
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* Returns: a #GCancellableChild.
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*
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* Since: 2.76
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*/
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GCancellableChild *
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g_cancellable_child_new (GCancellable *parent)
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{
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g_return_val_if_fail (G_IS_CANCELLABLE (parent), NULL);
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return g_object_new (G_TYPE_CANCELLABLE_CHILD,
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"parent", parent,
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NULL);
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}
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/**
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* g_cancellable_child_get_parent:
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* @cancellable_child: the parent #GCancellable to use
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*
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* Gets the parent @cancellable_child's #GCancellable
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*
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* Returns: (transfer none): @cancellable_child's parent #GCancellable
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*
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* Since: 2.76
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*/
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GCancellable *
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g_cancellable_child_get_parent (GCancellableChild *cancellable_child)
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{
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g_return_val_if_fail (G_IS_CANCELLABLE_CHILD (cancellable_child), NULL);
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return cancellable_child->parent_cancellable;
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}
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static void
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g_cancellable_child_cancel (GCancellable *cancellable)
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{
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GCancellableChild *self = G_CANCELLABLE_CHILD (cancellable);
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ConnectionData *connection_data;
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connection_data = g_atomic_pointer_exchange (&self->connection_data, NULL);
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if (connection_data)
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g_cancellable_disconnect (self->parent_cancellable, connection_data->id);
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G_CANCELLABLE_CLASS (g_cancellable_child_parent_class)->cancel (cancellable);
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}
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static void
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g_cancellable_child_dispose (GObject *object)
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{
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GCancellableChild *self = G_CANCELLABLE_CHILD (object);
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ConnectionData *connection_data;
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connection_data = g_atomic_pointer_exchange (&self->connection_data, NULL);
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if (connection_data &&
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g_atomic_pointer_compare_and_exchange (&connection_data->self, self, NULL))
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{
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gulong connection_id = connection_data->id;
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if (G_UNLIKELY (g_cancellable_is_cancelled (self->parent_cancellable)))
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{
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/* We do not disconnect from cancellation event if parent has been
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* cancelled, as it means we're likely disposing this object during
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* the parent cancellation callback. And in such case the parent is
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* already cancelled but our callback handler has not been yet called.
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* In such case we should still disconnect from the connection not to
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* leak, but we're doing it at next idle cycle, while we won't keep
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* any further reference on the parent cancellable.
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*/
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disconnect_from_parent_idle (self->parent_cancellable, connection_id);
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}
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else
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{
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g_cancellable_disconnect (self->parent_cancellable, connection_id);
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}
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}
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g_clear_object (&self->parent_cancellable);
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G_OBJECT_CLASS (g_cancellable_child_parent_class)->dispose (object);
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}
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static void
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g_cancellable_child_constructed (GObject *object)
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{
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GCancellableChild *self = G_CANCELLABLE_CHILD (object);
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if (g_cancellable_is_cancelled (self->parent_cancellable))
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{
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g_cancellable_cancel (G_CANCELLABLE (self));
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}
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else
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{
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ConnectionData *connection_data = g_new (ConnectionData, 1);
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/* We need to keep a reference on data to avoid races during callback */
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self->connection_data = connection_data;
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self->connection_data->self = self;
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self->connection_data->id =
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g_cancellable_connect (self->parent_cancellable,
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G_CALLBACK (on_parent_cancellable_cancelled),
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g_steal_pointer (&connection_data),
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(GDestroyNotify) connection_data_free);
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}
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}
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static void
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g_cancellable_child_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GCancellableChild *self = G_CANCELLABLE_CHILD (object);
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switch (prop_id)
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{
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case PROP_PARENT:
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g_value_set_object (value, self->parent_cancellable);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_cancellable_child_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GCancellableChild *self = G_CANCELLABLE_CHILD (object);
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switch (prop_id)
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{
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case PROP_PARENT:
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g_set_object (&self->parent_cancellable, g_value_get_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_cancellable_child_class_init (GCancellableChildClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->get_property = g_cancellable_child_get_property;
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gobject_class->set_property = g_cancellable_child_set_property;
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gobject_class->constructed = g_cancellable_child_constructed;
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gobject_class->dispose = g_cancellable_child_dispose;
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G_CANCELLABLE_CLASS (klass)->cancel = g_cancellable_child_cancel;
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/**
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* GCancellableChild:parent:
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*
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* The parent cancellable.
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*/
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g_object_class_install_property (gobject_class, PROP_PARENT,
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g_param_spec_object ("parent",
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P_("parent"),
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P_("The Parent cancellable"),
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G_TYPE_CANCELLABLE,
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G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_READWRITE |
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G_PARAM_STATIC_NAME |
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G_PARAM_STATIC_BLURB |
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G_PARAM_STATIC_NICK));
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}
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static void
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g_cancellable_child_init (GCancellableChild *self)
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{
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}
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57
gio/gcancellablechild.h
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57
gio/gcancellablechild.h
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@ -0,0 +1,57 @@
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2022 Canonical Ltd.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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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 2.1 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
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Marco Trevisan <marco.trevisan@canonical.com>
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*/
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#ifndef __G_CANCELLABLE_CHILD_H__
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#define __G_CANCELLABLE_CHILD_H__
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#include <gio/gcancellable.h>
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G_BEGIN_DECLS
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#define G_TYPE_CANCELLABLE_CHILD (g_cancellable_child_get_type ())
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#define G_CANCELLABLE_CHILD(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_CANCELLABLE_CHILD, GCancellableChild))
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#define G_IS_CANCELLABLE_CHILD(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_CANCELLABLE_CHILD))
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/**
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* GCancellableChild:
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*
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* Allows actions to be cancelled monitoring a parent cancellable.
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*/
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typedef struct _GCancellableChild GCancellableChild;
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GIO_AVAILABLE_IN_2_76
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GType g_cancellable_child_get_type (void) G_GNUC_CONST;
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GIO_AVAILABLE_IN_2_76
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GCancellableChild *g_cancellable_child_new (GCancellable *parent);
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GIO_AVAILABLE_IN_2_76
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GCancellable *g_cancellable_child_get_parent (GCancellableChild *cancellable_child);
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G_END_DECLS
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#endif /* __G_CANCELLABLE_CHILD_H__ */
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@ -38,6 +38,7 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC(GBufferedInputStream, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GBufferedOutputStream, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GBytesIcon, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GCancellable, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GCancellableChild, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GCharsetConverter, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GConverter, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GConverterInputStream, g_object_unref)
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@ -40,6 +40,7 @@
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#include <gio/gbufferedoutputstream.h>
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#include <gio/gbytesicon.h>
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#include <gio/gcancellable.h>
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#include <gio/gcancellablechild.h>
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#include <gio/gcharsetconverter.h>
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#include <gio/gcontenttype.h>
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#include <gio/gconverter.h>
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@ -484,6 +484,7 @@ gio_base_sources = files(
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'gbufferedoutputstream.c',
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'gbytesicon.c',
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'gcancellable.c',
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'gcancellablechild.c',
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'gcharsetconverter.c',
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'gcontextspecificgroup.c',
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'gconverter.c',
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@ -642,6 +643,7 @@ gio_headers = files(
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'gbufferedoutputstream.h',
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'gbytesicon.h',
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'gcancellable.h',
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'gcancellablechild.h',
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'gcontenttype.h',
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'gcharsetconverter.h',
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'gconverter.h',
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@ -6,12 +6,14 @@ test_autoptr (void)
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g_autoptr(GFile) p = g_file_new_for_path ("/blah");
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g_autoptr(GInetAddress) a = g_inet_address_new_from_string ("127.0.0.1");
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g_autoptr(GCancellable) cancellable = g_cancellable_new ();
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g_autoptr(GCancellableChild) cancellable_child = g_cancellable_child_new (cancellable);
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g_autofree gchar *path = g_file_get_path (p);
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g_autofree gchar *istr = g_inet_address_to_string (a);
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g_assert_cmpstr (path, ==, G_DIR_SEPARATOR_S "blah");
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g_assert_cmpstr (istr, ==, "127.0.0.1");
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g_assert_false (g_cancellable_is_cancelled (cancellable));
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g_assert_true (g_cancellable_child_get_parent (cancellable_child) == cancellable);
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}
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int
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@ -1,6 +1,7 @@
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2011 Collabora Ltd.
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* Copyright (C) 2022 Canonical Ltd.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
|
||||
@ -18,6 +19,7 @@
|
||||
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
* Author: Stef Walter <stefw@collabora.co.uk>
|
||||
* Marco Trevisan <marco.trevisan@canonical.com>
|
||||
*/
|
||||
|
||||
#include <locale.h>
|
||||
@ -31,6 +33,14 @@
|
||||
|
||||
static gint num_async_operations = 0;
|
||||
|
||||
static gulong
|
||||
get_first_cancelled_signal_handler_id (GCancellable *cancellable)
|
||||
{
|
||||
guint signal_id = g_signal_lookup ("cancelled", G_TYPE_CANCELLABLE);
|
||||
|
||||
return g_signal_handler_find (cancellable, G_SIGNAL_MATCH_ID, signal_id, 0, NULL, NULL, NULL);
|
||||
}
|
||||
|
||||
typedef struct
|
||||
{
|
||||
guint iterations_requested; /* construct-only */
|
||||
@ -885,6 +895,432 @@ test_cancellable_wrong_cancel_override (void)
|
||||
g_object_unref (bad);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_invalid (void)
|
||||
{
|
||||
GCancellableChild *child;
|
||||
|
||||
g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,
|
||||
"*G_IS_CANCELLABLE*failed*");
|
||||
child = g_cancellable_child_new (NULL);
|
||||
g_test_assert_expected_messages ();
|
||||
g_assert_null (child);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellable *parent_prop;
|
||||
GCancellableChild *child;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_true (G_IS_CANCELLABLE (child));
|
||||
g_assert_true (g_cancellable_child_get_parent (child) == parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
g_object_get (G_OBJECT (child), "parent", &parent_prop, NULL);
|
||||
g_assert_true (parent_prop == parent);
|
||||
|
||||
g_object_unref (child);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), ==, 0);
|
||||
|
||||
g_object_unref (parent);
|
||||
g_object_unref (parent_prop);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_chain (void)
|
||||
{
|
||||
GCancellable *root;
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child;
|
||||
GCancellableChild *last_child = NULL;
|
||||
const guint iterations = 20;
|
||||
guint i;
|
||||
|
||||
root = g_cancellable_new ();
|
||||
parent = root;
|
||||
|
||||
for (i = 0; i < iterations; i++)
|
||||
{
|
||||
child = g_cancellable_child_new (parent);
|
||||
|
||||
parent = G_CANCELLABLE (child);
|
||||
g_set_object (&last_child, child);
|
||||
g_object_unref (child);
|
||||
}
|
||||
|
||||
child = last_child;
|
||||
for (i = 0; i < iterations - 1; i++)
|
||||
{
|
||||
parent = g_cancellable_child_get_parent (child);
|
||||
g_assert_true (G_IS_CANCELLABLE_CHILD (parent));
|
||||
child = G_CANCELLABLE_CHILD (parent);
|
||||
}
|
||||
|
||||
parent = g_cancellable_child_get_parent (child);
|
||||
g_assert_false (G_IS_CANCELLABLE_CHILD (parent));
|
||||
g_assert_true (parent == root);
|
||||
|
||||
g_cancellable_cancel (root);
|
||||
|
||||
child = last_child;
|
||||
for (i = 0; i < iterations - 1; i++)
|
||||
{
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
parent = g_cancellable_child_get_parent (child);
|
||||
child = G_CANCELLABLE_CHILD (parent);
|
||||
}
|
||||
|
||||
parent = g_cancellable_child_get_parent (child);
|
||||
g_cancellable_is_cancelled (parent);
|
||||
g_assert_true (parent == root);
|
||||
|
||||
g_object_unref (root);
|
||||
g_object_unref (last_child);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_already_cancelled (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_true (g_cancellable_is_cancelled (parent));
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), ==, 0);
|
||||
|
||||
g_object_unref (child);
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
g_cancellable_cancel (G_CANCELLABLE (child));
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_false (g_cancellable_is_cancelled (parent));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), ==, 0);
|
||||
|
||||
g_object_unref (child);
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_parent_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
|
||||
g_assert_true (g_cancellable_is_cancelled (parent));
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
g_object_unref (child);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
while (get_first_cancelled_signal_handler_id (parent))
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_parent_cancellation_and_finalization (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child;
|
||||
GWeakRef parent_ref;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
|
||||
g_assert_true (g_cancellable_is_cancelled (parent));
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
g_object_unref (child);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
g_weak_ref_init (&parent_ref, parent);
|
||||
g_object_unref (parent);
|
||||
g_assert_null (g_weak_ref_get (&parent_ref));
|
||||
|
||||
/* Ensure we handle the cancellation idle properly */
|
||||
g_timeout_add_once (100, (GSourceOnceFunc) g_nullify_pointer, &parent);
|
||||
|
||||
while (parent != NULL)
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_cancel_multiple_concurrent_from_parent (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
guint i, iterations;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
num_async_operations = 0;
|
||||
|
||||
for (i = 0; i < 45; i++)
|
||||
{
|
||||
GCancellableChild *cancellable_child = g_cancellable_child_new (parent);
|
||||
|
||||
iterations = i + 10;
|
||||
mock_operation_async (iterations, g_random_boolean (),
|
||||
G_CANCELLABLE (cancellable_child),
|
||||
on_mock_operation_ready, GUINT_TO_POINTER (iterations));
|
||||
num_async_operations++;
|
||||
|
||||
g_object_unref (cancellable_child);
|
||||
}
|
||||
|
||||
g_assert_cmpint (num_async_operations, ==, 45);
|
||||
|
||||
if (g_test_verbose ())
|
||||
g_test_message ("CANCEL: %d operations", num_async_operations);
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_true (g_cancellable_is_cancelled (parent));
|
||||
|
||||
/* Wait for all operations to be cancelled */
|
||||
while (num_async_operations != 0 ||
|
||||
get_first_cancelled_signal_handler_id (parent) != 0)
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
g_assert_cmpint (num_async_operations, ==, 0);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), ==, 0);
|
||||
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_cancel_multiple_concurrent_from_root (void)
|
||||
{
|
||||
GCancellable *root;
|
||||
GCancellable *parent;
|
||||
guint i, iterations;
|
||||
|
||||
root = g_cancellable_new ();
|
||||
parent = g_object_ref (root);
|
||||
num_async_operations = 0;
|
||||
|
||||
for (i = 0; i < 45; i++)
|
||||
{
|
||||
GCancellableChild *cancellable_child = g_cancellable_child_new (parent);
|
||||
|
||||
iterations = i + 10;
|
||||
mock_operation_async (iterations, g_random_boolean (),
|
||||
G_CANCELLABLE (cancellable_child),
|
||||
on_mock_operation_ready, GUINT_TO_POINTER (iterations));
|
||||
num_async_operations++;
|
||||
|
||||
g_set_object (&parent, G_CANCELLABLE (cancellable_child));
|
||||
g_object_unref (cancellable_child);
|
||||
}
|
||||
|
||||
g_assert_cmpint (num_async_operations, ==, 45);
|
||||
|
||||
if (g_test_verbose ())
|
||||
g_test_message ("CANCEL: %d operations", num_async_operations);
|
||||
g_cancellable_cancel (root);
|
||||
g_assert_true (g_cancellable_is_cancelled (root));
|
||||
|
||||
/* Wait for all operations to be cancelled */
|
||||
while (num_async_operations != 0 ||
|
||||
get_first_cancelled_signal_handler_id (parent) != 0)
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
g_assert_cmpint (num_async_operations, ==, 0);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), ==, 0);
|
||||
|
||||
g_object_unref (root);
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
on_parent_cancelled_before_dispose (GCancellable *parent,
|
||||
GCancellableChild **child_ptr)
|
||||
{
|
||||
GCancellableChild *child = *child_ptr;
|
||||
GWeakRef child_ref;
|
||||
|
||||
g_weak_ref_init (&child_ref, child);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_object_unref (child);
|
||||
g_assert_null (g_weak_ref_get (&child_ref));
|
||||
|
||||
*child_ptr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_dispose_before_parent_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child = NULL;
|
||||
gulong id;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
id = g_cancellable_connect (parent,
|
||||
G_CALLBACK (on_parent_cancelled_before_dispose),
|
||||
&child, NULL);
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_null (child);
|
||||
|
||||
g_cancellable_disconnect (parent, id);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
while (get_first_cancelled_signal_handler_id (parent))
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
on_parent_cancelled_after_dispose (GCancellable *parent,
|
||||
GCancellableChild **child_ptr)
|
||||
{
|
||||
GCancellableChild *child = *child_ptr;
|
||||
GWeakRef child_ref;
|
||||
|
||||
g_weak_ref_init (&child_ref, child);
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_object_unref (child);
|
||||
g_assert_null (g_weak_ref_get (&child_ref));
|
||||
|
||||
*child_ptr = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_dispose_after_parent_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child = NULL;
|
||||
gulong id;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
id = g_cancellable_connect (parent,
|
||||
G_CALLBACK (on_parent_cancelled_after_dispose),
|
||||
&child, NULL);
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_null (child);
|
||||
|
||||
g_cancellable_disconnect (parent, id);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
while (get_first_cancelled_signal_handler_id (parent))
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
on_parent_cancelled_before_cancel (GCancellable *parent,
|
||||
GCancellableChild *child)
|
||||
{
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_cancellable_cancel (G_CANCELLABLE (child));
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_cancel_before_parent_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child = NULL;
|
||||
gulong id;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
id = g_cancellable_connect (parent,
|
||||
G_CALLBACK (on_parent_cancelled_before_cancel),
|
||||
child, NULL);
|
||||
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_disconnect (parent, id);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
while (get_first_cancelled_signal_handler_id (parent))
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
|
||||
g_object_unref (child);
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
static void
|
||||
on_parent_cancelled_after_cancel (GCancellable *parent,
|
||||
GCancellableChild *child)
|
||||
{
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
g_cancellable_cancel (G_CANCELLABLE (child));
|
||||
}
|
||||
|
||||
static void
|
||||
test_cancellable_child_cancel_after_parent_cancellation (void)
|
||||
{
|
||||
GCancellable *parent;
|
||||
GCancellableChild *child = NULL;
|
||||
gulong id;
|
||||
|
||||
parent = g_cancellable_new ();
|
||||
child = g_cancellable_child_new (parent);
|
||||
g_assert_false (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
id = g_cancellable_connect (parent,
|
||||
G_CALLBACK (on_parent_cancelled_after_cancel),
|
||||
child, NULL);
|
||||
|
||||
g_cancellable_cancel (parent);
|
||||
g_assert_true (g_cancellable_is_cancelled (G_CANCELLABLE (child)));
|
||||
|
||||
g_cancellable_disconnect (parent, id);
|
||||
g_assert_cmpuint (get_first_cancelled_signal_handler_id (parent), !=, 0);
|
||||
|
||||
while (get_first_cancelled_signal_handler_id (parent))
|
||||
g_main_context_iteration (NULL, TRUE);
|
||||
|
||||
g_object_unref (child);
|
||||
g_object_unref (parent);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char *argv[])
|
||||
{
|
||||
@ -902,6 +1338,19 @@ main (int argc, char *argv[])
|
||||
g_test_add_func ("/cancellable/invalid-cancel-override", test_cancellable_wrong_cancel_override);
|
||||
g_test_add_func ("/cancellable-source/threaded-dispose", test_cancellable_source_threaded_dispose);
|
||||
g_test_add_func ("/cancellable-source/can-be-fired-multiple-times", test_cancellable_source_can_be_fired_multiple_times);
|
||||
g_test_add_func ("/cancellable-child/invalid", test_cancellable_child_invalid);
|
||||
g_test_add_func ("/cancellable-child/basic", test_cancellable_child);
|
||||
g_test_add_func ("/cancellable-child/chain", test_cancellable_child_chain);
|
||||
g_test_add_func ("/cancellable-child/already-cancelled", test_cancellable_child_already_cancelled);
|
||||
g_test_add_func ("/cancellable-child/child-cancellation", test_cancellable_child_cancellation);
|
||||
g_test_add_func ("/cancellable-child/parent-cancellation", test_cancellable_child_parent_cancellation);
|
||||
g_test_add_func ("/cancellable-child/parent-cancellation-and-finalization", test_cancellable_child_parent_cancellation_and_finalization);
|
||||
g_test_add_func ("/cancellable-child/threaded-cancellation", test_cancellable_child_cancel_multiple_concurrent_from_parent);
|
||||
g_test_add_func ("/cancellable-child/threaded-cancellation-chain", test_cancellable_child_cancel_multiple_concurrent_from_root);
|
||||
g_test_add_func ("/cancellable-child/disposition-before-parent-cancellation", test_cancellable_child_dispose_before_parent_cancellation);
|
||||
g_test_add_func ("/cancellable-child/disposition-after-parent-cancellation", test_cancellable_child_dispose_after_parent_cancellation);
|
||||
g_test_add_func ("/cancellable-child/cancellation-before-parent-cancellation", test_cancellable_child_cancel_before_parent_cancellation);
|
||||
g_test_add_func ("/cancellable-child/cancellation-after-parent-cancellation", test_cancellable_child_cancel_after_parent_cancellation);
|
||||
|
||||
return g_test_run ();
|
||||
}
|
||||
|
@ -75,6 +75,7 @@ test_type (gconstpointer data)
|
||||
if (g_type_is_a (type, G_TYPE_BINDING) ||
|
||||
g_type_is_a (type, G_TYPE_BUFFERED_INPUT_STREAM) ||
|
||||
g_type_is_a (type, G_TYPE_BUFFERED_OUTPUT_STREAM) ||
|
||||
g_type_is_a (type, G_TYPE_CANCELLABLE_CHILD) ||
|
||||
g_type_is_a (type, G_TYPE_CHARSET_CONVERTER) ||
|
||||
g_type_is_a (type, G_TYPE_DBUS_ACTION_GROUP) ||
|
||||
g_type_is_a (type, G_TYPE_DBUS_CONNECTION) ||
|
||||
|
Loading…
Reference in New Issue
Block a user