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object: add object_class_property_add_link()

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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>
This commit is contained in:
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 */ /* private */
OBJ_PROP_LINK_DIRECT = 0x2, OBJ_PROP_LINK_DIRECT = 0x2,
OBJ_PROP_LINK_CLASS = 0x4,
} ObjectPropertyLinkFlags; } ObjectPropertyLinkFlags;
/** /**
@ -1562,6 +1563,14 @@ void object_property_add_link(Object *obj, const char *name,
ObjectPropertyLinkFlags flags, ObjectPropertyLinkFlags flags,
Error **errp); 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: * object_property_add_str:
* @obj: the object to add a property to * @obj: the object to add a property to

44
qom/object.c
View File

@ -1716,6 +1716,7 @@ typedef struct {
union { union {
Object **targetp; Object **targetp;
Object *target; /* if OBJ_PROP_LINK_DIRECT, when holding the pointer */ 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 **); void (*check)(const Object *, const char *, Object *, Error **);
ObjectPropertyLinkFlags flags; ObjectPropertyLinkFlags flags;
@ -1726,6 +1727,8 @@ object_link_get_targetp(Object *obj, LinkProperty *lprop)
{ {
if (lprop->flags & OBJ_PROP_LINK_DIRECT) { if (lprop->flags & OBJ_PROP_LINK_DIRECT) {
return &lprop->target; return &lprop->target;
} else if (lprop->flags & OBJ_PROP_LINK_CLASS) {
return (void *)obj + lprop->offset;
} else { } else {
return lprop->targetp; return lprop->targetp;
} }
@ -1841,8 +1844,10 @@ static void object_release_link_property(Object *obj, const char *name,
if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) { if ((prop->flags & OBJ_PROP_LINK_STRONG) && *targetp) {
object_unref(*targetp); object_unref(*targetp);
} }
if (!(prop->flags & OBJ_PROP_LINK_CLASS)) {
g_free(prop); g_free(prop);
} }
}
static void object_add_link_prop(Object *obj, const char *name, static void object_add_link_prop(Object *obj, const char *name,
const char *type, void *ptr, const char *type, void *ptr,
@ -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); 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, void object_property_add_const_link(Object *obj, const char *name,
Object *target, Error **errp) Object *target, Error **errp)
{ {