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object: add object_class_property_add_link() 

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20200110153039.1379601-17-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
master
Marc-André Lureau 2020-01-10 19:30:29 +04:00 committed by Paolo Bonzini
parent 4a8d57989b
commit 840ecdfbf9
2 changed files with 54 additions and 1 deletions
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9
include/qom/object.h
View File

@ -1514,6 +1514,7 @@ typedef enum {
/* private */
OBJ_PROP_LINK_DIRECT = 0x2,
OBJ_PROP_LINK_CLASS = 0x4,
} ObjectPropertyLinkFlags;
/**
@ -1562,6 +1563,14 @@ void object_property_add_link(Object *obj, const char *name,
ObjectPropertyLinkFlags flags,
Error **errp);
ObjectProperty *object_class_property_add_link(ObjectClass *oc,
const char *name,
const char *type, ptrdiff_t offset,
void (*check)(const Object *obj, const char *name,
Object *val, Error **errp),
ObjectPropertyLinkFlags flags,
Error **errp);
/**
* object_property_add_str:
* @obj: the object to add a property to

46
qom/object.c
View File

@ -1716,6 +1716,7 @@ typedef struct {
union {
Object **targetp;
Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */
ptrdiff_t offset; /* if OBJ_PROP_LINK_CLASS */
};
void (*check)(const Object *, const char *, Object *, Error **);
ObjectPropertyLinkFlags flags;
@ -1726,6 +1727,8 @@ object_link_get_targetp(Object *obj, LinkProperty *lprop)
{
if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
return &lprop->target;
} else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
return (void *)obj + lprop->offset;
} else {
return lprop->targetp;
}
@ -1841,7 +1844,9 @@ static void object_release_link_property(Object *obj, const char *name,
if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
object_unref(*targetp);
}
g_free(prop);
if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
g_free(prop);
}
}
static void object_add_link_prop(Object *obj, const char *name,
@ -1894,6 +1899,45 @@ void object_property_add_link(Object *obj, const char *name,
object_add_link_prop(obj, name, type, targetp, check, flags, errp);
}
ObjectProperty *
object_class_property_add_link(ObjectClass *oc,
const char *name,
const char *type, ptrdiff_t offset,
void (*check)(const Object *obj, const char *name,
Object *val, Error **errp),
ObjectPropertyLinkFlags flags,
Error **errp)
{
Error *local_err = NULL;
LinkProperty *prop = g_new0(LinkProperty, 1);
gchar *full_type;
ObjectProperty *op;
prop->offset = offset;
prop->check = check;
prop->flags = flags | OBJ_PROP_LINK_CLASS;
full_type = g_strdup_printf("link<%s>", type);
op = object_class_property_add(oc, name, full_type,
object_get_link_property,
check ? object_set_link_property : NULL,
object_release_link_property,
prop,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
g_free(prop);
goto out;
}
op->resolve = object_resolve_link_property;
out:
g_free(full_type);
return op;
}
void object_property_add_const_link(Object *obj, const char *name,
Object *target, Error **errp)
{