mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-06 13:29:56 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Avoid a race condition when one PA instance gets HAL's ACLAdded message before the previous owner instance has given up access to the device, and thus the device is blocked

Browse source 
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1611 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-08-10 00:15:20 +00:00
parent d9e44c52cb
commit 3b078b2068
1 changed files with 58 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

62
src/modules/module-hal-detect.c
View file

@ -540,10 +540,21 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, vo
if (d->sink_name) {
pa_sink *sink;
if ((sink = pa_namereg_get(u->core, d->sink_name, PA_NAMEREG_SINK, 0)))
if (pa_sink_suspend(sink, suspend) >= 0)
if (!suspend)
if ((sink = pa_namereg_get(u->core, d->sink_name, PA_NAMEREG_SINK, 0))) {
int prev_suspended = pa_sink_get_state(sink) == PA_SINK_SUSPENDED;
if (pa_sink_suspend(sink, suspend) >= 0) {
if (!suspend && prev_suspended)
pa_scache_play_item_by_name(u->core, "pulse-access", d->sink_name, PA_VOLUME_NORM, 0);
else if (suspend && !prev_suspended) {
DBusMessage *msg;
msg = dbus_message_new_signal(udi, "org.pulseaudio.Server", "DirtyGiveUpMessage");
dbus_connection_send(pa_dbus_connection_get(u->connection), msg, NULL);
dbus_message_unref(msg);
}
}
}
}
if (d->source_name) {
@ -555,9 +566,46 @@ static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, vo
} else if (!suspend)
hal_device_add(u, udi);
}
} else if (dbus_message_is_signal(message, "org.pulseaudio.Server", "DirtyGiveUpMessage")) {
/* We use this message to avoid a dirty race condition when we
get an ACLAdded message before the previously owning PA
sever has closed the device. We can remove this as
soon as HAL learns frevoke() */
const char *udi;
struct device *d;
pa_log_debug("Got dirty give up message, trying resume ...");
udi = dbus_message_get_path(message);
if ((d = pa_hashmap_get(u->devices, udi))) {
if (d->sink_name) {
pa_sink *sink;
if ((sink = pa_namereg_get(u->core, d->sink_name, PA_NAMEREG_SINK, 0))) {
int prev_suspended = pa_sink_get_state(sink) == PA_SINK_SUSPENDED;
if (pa_sink_suspend(sink, 0) >= 0)
if (prev_suspended && !prev_suspended)
pa_scache_play_item_by_name(u->core, "pulse-access", d->sink_name, PA_VOLUME_NORM, 0);
}
}
if (d->source_name) {
pa_source *source;
if ((source = pa_namereg_get(u->core, d->source_name, PA_NAMEREG_SOURCE, 0)))
pa_source_suspend(source, 0);
}
} else
/* Yes, we don't check the UDI for validity, but hopefully HAL will */
hal_device_add(u, udi);
}
finish:
@ -673,6 +721,12 @@ int pa__init(pa_core *c, pa_module*m) {
pa_log_error("Unable to subscribe to HAL ACL signals: %s: %s", error.name, error.message);
goto fail;
}
dbus_bus_add_match(pa_dbus_connection_get(conn), "type='signal',interface='org.pulseaudio.Server'", &error);
if (dbus_error_is_set(&error)) {
pa_log_error("Unable to subscribe to PulseAudio signals: %s: %s", error.name, error.message);
goto fail;
}
pa_log_info("Loaded %i modules.", n);