diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/core/qdev.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 901f289860..2eacac0787 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -189,6 +189,56 @@ int qdev_init(DeviceState *dev) return 0; } +static QTAILQ_HEAD(device_listeners, DeviceListener) device_listeners + = QTAILQ_HEAD_INITIALIZER(device_listeners); + +enum ListenerDirection { Forward, Reverse }; + +#define DEVICE_LISTENER_CALL(_callback, _direction, _args...) \ + do { \ + DeviceListener *_listener; \ + \ + switch (_direction) { \ + case Forward: \ + QTAILQ_FOREACH(_listener, &device_listeners, link) { \ + if (_listener->_callback) { \ + _listener->_callback(_listener, ##_args); \ + } \ + } \ + break; \ + case Reverse: \ + QTAILQ_FOREACH_REVERSE(_listener, &device_listeners, \ + device_listeners, link) { \ + if (_listener->_callback) { \ + _listener->_callback(_listener, ##_args); \ + } \ + } \ + break; \ + default: \ + abort(); \ + } \ + } while (0) + +static int device_listener_add(DeviceState *dev, void *opaque) +{ + DEVICE_LISTENER_CALL(realize, Forward, dev); + + return 0; +} + +void device_listener_register(DeviceListener *listener) +{ + QTAILQ_INSERT_TAIL(&device_listeners, listener, link); + + qbus_walk_children(sysbus_get_default(), NULL, NULL, device_listener_add, + NULL, NULL); +} + +void device_listener_unregister(DeviceListener *listener) +{ + QTAILQ_REMOVE(&device_listeners, listener, link); +} + static void device_realize(DeviceState *dev, Error **errp) { DeviceClass *dc = DEVICE_GET_CLASS(dev); @@ -994,6 +1044,8 @@ static void device_set_realized(Object *obj, bool value, Error **errp) goto fail; } + DEVICE_LISTENER_CALL(realize, Forward, dev); + hotplug_ctrl = qdev_get_hotplug_handler(dev); if (hotplug_ctrl) { hotplug_handler_plug(hotplug_ctrl, dev, &local_err); @@ -1035,6 +1087,7 @@ static void device_set_realized(Object *obj, bool value, Error **errp) dc->unrealize(dev, local_errp); } dev->pending_deleted_event = true; + DEVICE_LISTENER_CALL(unrealize, Reverse, dev); } if (local_err != NULL) { |