[Virtio-fs] [PATCH v3 02/20] include/hw: document the device_class_set_parent_* fns
Alex Bennée
alex.bennee at linaro.org
Mon Jul 10 15:35:04 UTC 2023
These are useful functions for when you want proper inheritance of
functionality across realize/unrealize calls.
Signed-off-by: Alex Bennée <alex.bennee at linaro.org>
---
include/hw/qdev-core.h | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 196ebf6d91..884c726a87 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -952,9 +952,36 @@ void device_class_set_props(DeviceClass *dc, Property *props);
void device_class_set_parent_reset(DeviceClass *dc,
DeviceReset dev_reset,
DeviceReset *parent_reset);
+
+/**
+ * device_class_set_parent_realize() - set up for chaining realize fns
+ * @dc: The device class
+ * @dev_realize: the device realize function
+ * @parent_realize: somewhere to save the parents realize function
+ *
+ * This is intended to be used when the new realize function will
+ * eventually call its parent realization function during creation.
+ * This requires storing the function call somewhere (usually in the
+ * instance structure) so you can eventually call
+ * dc->parent_realize(dev, errp)
+ */
void device_class_set_parent_realize(DeviceClass *dc,
DeviceRealize dev_realize,
DeviceRealize *parent_realize);
+
+
+/**
+ * device_class_set_parent_unrealize() - set up for chaining unrealize fns
+ * @dc: The device class
+ * @dev_unrealize: the device realize function
+ * @parent_unrealize: somewhere to save the parents unrealize function
+ *
+ * This is intended to be used when the new unrealize function will
+ * eventually call its parent unrealization function during the
+ * unrealize phase. This requires storing the function call somewhere
+ * (usually in the instance structure) so you can eventually call
+ * dc->parent_unrealize(dev);
+ */
void device_class_set_parent_unrealize(DeviceClass *dc,
DeviceUnrealize dev_unrealize,
DeviceUnrealize *parent_unrealize);
--
2.39.2
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