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include/hw: document the device_class_set_parent_* fns 

These are useful functions for when you want proper inheritance of
functionality across realize/unrealize calls.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230710153522.3469097-3-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Alex Bennée 2023-07-10 16:35:04 +01:00 committed by Michael S. Tsirkin
parent e57fc3dec9
commit c378e88218
1 changed files with 27 additions and 0 deletions
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27
include/hw/qdev-core.h
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@ -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);