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qom: add string property type

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Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-12-12 14:29:42 -06:00
parent ad6d45fa08
commit 6a146eba33
2 changed files with 81 additions and 0 deletions
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59
hw/qdev.c
View file

@ -1449,3 +1449,62 @@ DeviceState *qdev_resolve_path(const char *path, bool *ambiguous)
return dev;
}
typedef struct StringProperty
{
char *(*get)(DeviceState *, Error **);
void (*set)(DeviceState *, const char *, Error **);
} StringProperty;
static void qdev_property_get_str(DeviceState *dev, Visitor *v, void *opaque,
const char *name, Error **errp)
{
StringProperty *prop = opaque;
char *value;
value = prop->get(dev, errp);
if (value) {
visit_type_str(v, &value, name, errp);
g_free(value);
}
}
static void qdev_property_set_str(DeviceState *dev, Visitor *v, void *opaque,
const char *name, Error **errp)
{
StringProperty *prop = opaque;
char *value;
Error *local_err = NULL;
visit_type_str(v, &value, name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
prop->set(dev, value, errp);
g_free(value);
}
static void qdev_property_release_str(DeviceState *dev, const char *name,
void *opaque)
{
StringProperty *prop = opaque;
g_free(prop);
}
void qdev_property_add_str(DeviceState *dev, const char *name,
char *(*get)(DeviceState *, Error **),
void (*set)(DeviceState *, const char *, Error **),
Error **errp)
{
StringProperty *prop = g_malloc0(sizeof(*prop));
prop->get = get;
prop->set = set;
qdev_property_add(dev, name, "string",
get ? qdev_property_get_str : NULL,
set ? qdev_property_set_str : NULL,
qdev_property_release_str,
prop, errp);
}

22
hw/qdev.h
View file

@ -574,4 +574,26 @@ void qdev_property_add_link(DeviceState *dev, const char *name,
const char *type, DeviceState **child,
Error **errp);
/**
* @qdev_property_add_str
*
* Add a string property using getters/setters. This function will add a
* property of type 'string'.
*
* @dev - the device to add a property to
*
* @name - the name of the property
*
* @get - the getter or NULL if the property is write-only. This function must
* return a string to be freed by @g_free().
*
* @set - the setter or NULL if the property is read-only
*
* @errp - if an error occurs, a pointer to an area to store the error
*/
void qdev_property_add_str(DeviceState *dev, const char *name,
char *(*get)(DeviceState *, Error **),
void (*set)(DeviceState *, const char *, Error **),
Error **errp);
#endif