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qom: Add recursive version of object_child_for_each 

Useful for iterating through an entire QOM subtree.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1441383782-24378-2-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Crosthwaite 2015-09-08 17:38:43 +01:00 committed by Peter Maydell
parent d5523a1365
commit d714b8de77
2 changed files with 37 additions and 3 deletions
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15
include/qom/object.h
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@ -1493,6 +1493,21 @@ void object_property_set_description(Object *obj, const char *name,
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
void *opaque);
/**
* object_child_foreach_recursive:
* @obj: the object whose children will be navigated
* @fn: the iterator function to be called
* @opaque: an opaque value that will be passed to the iterator
*
* Call @fn passing each child of @obj and @opaque to it, until @fn returns
* non-zero. Calls recursively, all child nodes of @obj will also be passed
* all the way down to the leaf nodes of the tree. Depth first ordering.
*
* Returns: The last value returned by @fn, or 0 if there is no child.
*/
int object_child_foreach_recursive(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque);
/**
* container_get:
* @root: root of the #path, e.g., object_get_root()

25
qom/object.c
View File

@ -775,23 +775,42 @@ void object_class_foreach(void (*fn)(ObjectClass *klass, void *opaque),
enumerating_types = false;
}
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
void *opaque)
static int do_object_child_foreach(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque, bool recurse)
{
ObjectProperty *prop, *next;
int ret = 0;
QTAILQ_FOREACH_SAFE(prop, &obj->properties, node, next) {
if (object_property_is_child(prop)) {
ret = fn(prop->opaque, opaque);
Object *child = prop->opaque;
ret = fn(child, opaque);
if (ret != 0) {
break;
}
if (recurse) {
do_object_child_foreach(child, fn, opaque, true);
}
}
}
return ret;
}
int object_child_foreach(Object *obj, int (*fn)(Object *child, void *opaque),
void *opaque)
{
return do_object_child_foreach(obj, fn, opaque, false);
}
int object_child_foreach_recursive(Object *obj,
int (*fn)(Object *child, void *opaque),
void *opaque)
{
return do_object_child_foreach(obj, fn, opaque, true);
}
static void object_class_get_list_tramp(ObjectClass *klass, void *opaque)
{
GSList **list = opaque;