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

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>
(cherry picked from commit 46795cf2e2)
*prereq for 0c53057adb
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-2.11
Philippe Mathieu-Daudé 2018-01-13 23:04:11 -03:00 committed by Michael Roth
parent 0db89523a6
commit 18f59bbc76
2 changed files with 34 additions and 0 deletions
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24
hw/core/qdev.c
View File

@ -1140,6 +1140,30 @@ 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

@ -381,6 +381,16 @@ 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);