lur: add lur_device_get/set_userdata

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
BT: move the functions in LIBLUR_0.4.0
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>

src/liblur.c

@@ -50,6 +50,7 @@ struct lur_receiver {
 struct lur_device {
 	struct lur_receiver *receiver;
 	int refcount;
+	void *userdata;
 
 	char *name;
 	uint16_t vid, pid;
@@ -347,3 +348,15 @@ lur_device_unref(struct lur_device *dev)
 
 	return NULL;
 }
+
+_EXPORT_ void
+lur_device_set_user_data(struct lur_device *dev, void *userdata)
+{
+	dev->userdata = userdata;
+}
+
+_EXPORT_ void*
+lur_device_get_user_data(const struct lur_device *dev)
+{
+	return dev->userdata;
+}

src/liblur.h

@@ -239,6 +239,27 @@ lur_device_ref(struct lur_device *dev);
 struct lur_device *
 lur_device_unref(struct lur_device *dev);
 
+/**
+ * Set caller-specific data associated with this object. liblur does
+ * not manage, look at, or modify this data. The caller must ensure the
+ * data is valid.
+ *
+ * @param dev A valid device object
+ * @param userdata Caller-specific data
+ */
+void
+lur_device_set_user_data(struct lur_device *dev, void *userdata);
+
+/**
+ * Get the caller-specific data associated with this object, if any.
+ *
+ * @param dev A valid device object
+ * @return The caller-specific data previously assigned in
+ * lur_device_set_user_data().
+ */
+void*
+lur_device_get_user_data(const struct lur_device *dev);
+
 #ifdef __cplusplus
 }
 #endif

src/liblur.sym

@@ -23,3 +23,9 @@ global:
 local:
 	*;
 };
+
+LIBLUR_0.4.0 {
+global:
+	lur_device_get_user_data;
+	lur_device_set_user_data;
+} LIBLUR_0.3.0;