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qdev: add helpers to be more explicit when using abstract QOM parent functions

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QOM API learning curve is quite hard, in particular when devices inherit from
abstract parent.
To be more explicit about when a device class change the parent hooks, add few
helpers hoping a device class_init() will be easier to understand.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180114020412.26160-3-f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2018-01-13 23:04:11 -03:00 committed by Paolo Bonzini
parent b850f664a1
commit 46795cf2e2
2 changed files with 34 additions and 0 deletions
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24
hw/core/qdev.c
View File

@ -1075,6 +1075,30 @@ static void device_class_init(ObjectClass *class, void *data)
dc->user_creatable = true;
}
void device_class_set_parent_reset(DeviceClass *dc,
DeviceReset dev_reset,
DeviceReset *parent_reset)
{
*parent_reset = dc->reset;
dc->reset = dev_reset;
}
void device_class_set_parent_realize(DeviceClass *dc,
DeviceRealize dev_realize,
DeviceRealize *parent_realize)
{
*parent_realize = dc->realize;
dc->realize = dev_realize;
}
void device_class_set_parent_unrealize(DeviceClass *dc,
DeviceUnrealize dev_unrealize,
DeviceUnrealize *parent_unrealize)
{
*parent_unrealize = dc->unrealize;
dc->unrealize = dev_unrealize;
}
void device_reset(DeviceState *dev)
{
DeviceClass *klass = DEVICE_GET_CLASS(dev);

10
include/hw/qdev-core.h
View File

@ -382,6 +382,16 @@ void qdev_machine_init(void);
*/
void device_reset(DeviceState *dev);
void device_class_set_parent_reset(DeviceClass *dc,
DeviceReset dev_reset,
DeviceReset *parent_reset);
void device_class_set_parent_realize(DeviceClass *dc,
DeviceRealize dev_realize,
DeviceRealize *parent_realize);
void device_class_set_parent_unrealize(DeviceClass *dc,
DeviceUnrealize dev_unrealize,
DeviceUnrealize *parent_unrealize);
const struct VMStateDescription *qdev_get_vmsd(DeviceState *dev);
const char *qdev_fw_name(DeviceState *dev);