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authorFam Zheng <famz@redhat.com>2017-07-14 10:14:52 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2017-07-14 12:04:42 +0200
commit5b4ff3c661374b2df247e12b58667e4643b30af1 (patch)
tree96beea107bb99a102dbbb423e061d841adf788a5
parentfaabdbb792889bf011a593578d1de51e14616bb7 (diff)
qdev: Introduce DEFINE_PROP_LINK
This property can be used to replace the object_property_add_link in device code, to add a link to other objects, which is a common pattern. Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <20170714021509.23681-4-famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--hw/core/qdev-properties.c18
-rw-r--r--include/hw/qdev-core.h1
-rw-r--r--include/hw/qdev-properties.h9
3 files changed, 28 insertions, 0 deletions
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 113ce7df46..5429c63e23 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -1214,3 +1214,21 @@ PropertyInfo qdev_prop_size = {
.set = set_size,
.set_default_value = set_default_value_uint,
};
+
+/* --- object link property --- */
+
+static void create_link_property(Object *obj, Property *prop, Error **errp)
+{
+ Object **child = qdev_get_prop_ptr(DEVICE(obj), prop);
+
+ object_property_add_link(obj, prop->name, prop->link_type,
+ child,
+ qdev_prop_allow_set_link_before_realize,
+ OBJ_PROP_LINK_UNREF_ON_RELEASE,
+ errp);
+}
+
+PropertyInfo qdev_prop_link = {
+ .name = "link",
+ .create = create_link_property,
+};
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 33518eec12..08d1d2c6f9 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -233,6 +233,7 @@ struct Property {
int arrayoffset;
PropertyInfo *arrayinfo;
int arrayfieldsize;
+ const char *link_type;
};
struct PropertyInfo {
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 9edded29d2..876ba2e283 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -30,6 +30,7 @@ extern PropertyInfo qdev_prop_pci_devfn;
extern PropertyInfo qdev_prop_blocksize;
extern PropertyInfo qdev_prop_pci_host_devaddr;
extern PropertyInfo qdev_prop_arraylen;
+extern PropertyInfo qdev_prop_link;
#define DEFINE_PROP(_name, _state, _field, _prop, _type) { \
.name = (_name), \
@@ -117,6 +118,14 @@ extern PropertyInfo qdev_prop_arraylen;
.arrayoffset = offsetof(_state, _arrayfield), \
}
+#define DEFINE_PROP_LINK(_name, _state, _field, _type, _ptr_type) { \
+ .name = (_name), \
+ .info = &(qdev_prop_link), \
+ .offset = offsetof(_state, _field) \
+ + type_check(_ptr_type, typeof_field(_state, _field)), \
+ .link_type = _type, \
+ }
+
#define DEFINE_PROP_UINT8(_n, _s, _f, _d) \
DEFINE_PROP_UNSIGNED(_n, _s, _f, _d, qdev_prop_uint8, uint8_t)
#define DEFINE_PROP_UINT16(_n, _s, _f, _d) \