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gdbus: make gdbusconnection ids thread-safe

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To prevent a race where these global static counters can be
incremented by two threads concurrently.

https://bugzilla.gnome.org/show_bug.cgi?id=778096
This commit is contained in:
Fabrice Bellet
2017-02-03 17:46:09 +01:00
committed by Philip Withnall
parent c457ec053d
commit b1f14143e5
1 changed files with 8 additions and 8 deletions
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16
gio/gdbusconnection.c
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@@ -3057,7 +3057,7 @@ g_dbus_connection_get_peer_credentials (GDBusConnection *connection)
/* ---------------------------------------------------------------------------------------------------- */
static guint _global_filter_id = 1;
static volatile guint _global_filter_id = 1;
/**
* g_dbus_connection_add_filter:
@@ -3114,7 +3114,7 @@ g_dbus_connection_add_filter (GDBusConnection *connection,
CONNECTION_LOCK (connection);
data = g_new0 (FilterData, 1);
data->id = _global_filter_id++; /* TODO: overflow etc. */
data->id = g_atomic_int_add (&_global_filter_id, 1); /* TODO: overflow etc. */
data->ref_count = 1;
data->filter_function = filter_function;
data->user_data = user_data;
@@ -3272,9 +3272,9 @@ args_to_rule (const gchar *sender,
return g_string_free (rule, FALSE);
}
static guint _global_subscriber_id = 1;
static guint _global_registration_id = 1;
static guint _global_subtree_registration_id = 1;
static volatile guint _global_subscriber_id = 1;
static volatile guint _global_registration_id = 1;
static volatile guint _global_subtree_registration_id = 1;
/* ---------------------------------------------------------------------------------------------------- */
@@ -3466,7 +3466,7 @@ g_dbus_connection_signal_subscribe (GDBusConnection *connection,
subscriber.callback = callback;
subscriber.user_data = user_data;
subscriber.user_data_free_func = user_data_free_func;
subscriber.id = _global_subscriber_id++; /* TODO: overflow etc. */
subscriber.id = g_atomic_int_add (&_global_subscriber_id, 1); /* TODO: overflow etc. */
subscriber.context = g_main_context_ref_thread_default ();
/* see if we've already have this rule */
@@ -5156,7 +5156,7 @@ g_dbus_connection_register_object (GDBusConnection *connection,
}
ei = g_new0 (ExportedInterface, 1);
ei->id = _global_registration_id++; /* TODO: overflow etc. */
ei->id = g_atomic_int_add (&_global_registration_id, 1); /* TODO: overflow etc. */
ei->eo = eo;
ei->user_data = user_data;
ei->user_data_free_func = user_data_free_func;
@@ -6813,7 +6813,7 @@ g_dbus_connection_register_subtree (GDBusConnection *connection,
es->vtable = _g_dbus_subtree_vtable_copy (vtable);
es->flags = flags;
es->id = _global_subtree_registration_id++; /* TODO: overflow etc. */
es->id = g_atomic_int_add (&_global_subtree_registration_id, 1); /* TODO: overflow etc. */
es->user_data = user_data;
es->user_data_free_func = user_data_free_func;
es->context = g_main_context_ref_thread_default ();