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GDBusWorker: as a precaution, access 'stopped' boolean atomically

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This member is written in _g_dbus_worker_stop from arbitrary threads, and
read by the worker thread, so it should be accessed atomically.

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=651268
Bug-NB: NB#271520
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
Simon McVittie 2011-09-12 18:26:45 +01:00 committed by David Zeuthen
parent 20497f7af9
commit 698eeb3ef6
1 changed files with 7 additions and 6 deletions
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13
gio/gdbusprivate.c
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@ -340,7 +340,8 @@ struct GDBusWorker
SharedThreadData *shared_thread_data;
gboolean stopped;
/* really a boolean, but GLib 2.28 lacks atomic boolean ops */
volatile gint stopped;
/* TODO: frozen (e.g. G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING) currently
* only affects messages received from the other peer (since GDBusServer is the
@ -472,7 +473,7 @@ _g_dbus_worker_emit_disconnected (GDBusWorker *worker,
gboolean remote_peer_vanished,
GError *error)
{
if (!worker->stopped)
if (!g_atomic_int_get (&worker->stopped))
worker->disconnected_callback (worker, remote_peer_vanished, error, worker->user_data);
}
@ -480,7 +481,7 @@ static void
_g_dbus_worker_emit_message_received (GDBusWorker *worker,
GDBusMessage *message)
{
if (!worker->stopped)
if (!g_atomic_int_get (&worker->stopped))
worker->message_received_callback (worker, message, worker->user_data);
}
@ -489,7 +490,7 @@ _g_dbus_worker_emit_message_about_to_be_sent (GDBusWorker *worker,
GDBusMessage *message)
{
GDBusMessage *ret;
if (!worker->stopped)
if (!g_atomic_int_get (&worker->stopped))
ret = worker->message_about_to_be_sent_callback (worker, message, worker->user_data);
else
ret = message;
@ -571,7 +572,7 @@ _g_dbus_worker_do_read_cb (GInputStream *input_stream,
g_mutex_lock (worker->read_lock);
/* If already stopped, don't even process the reply */
if (worker->stopped)
if (g_atomic_int_get (&worker->stopped))
goto out;
error = NULL;
@ -1631,7 +1632,7 @@ _g_dbus_worker_close (GDBusWorker *worker,
void
_g_dbus_worker_stop (GDBusWorker *worker)
{
worker->stopped = TRUE;
g_atomic_int_set (&worker->stopped, TRUE);
/* Cancel any pending operations and schedule a close of the underlying I/O
* stream in the worker thread