Add publisher id getter

include/zenoh_commons.h

@@ -2267,6 +2267,10 @@ ZENOHC_API void z_publisher_delete_options_default(struct z_publisher_delete_opt
  * Frees memory and resets publisher to its gravestone state. Also attempts undeclare publisher.
  */
 ZENOHC_API void z_publisher_drop(struct z_owned_publisher_t *this_);
+/**
+ * Returns the ID of the publisher.
+ */
+ZENOHC_API struct z_entity_global_id_t z_publisher_id(const struct z_loaned_publisher_t *publisher);
 /**
  * Returns the key expression of the publisher.
  */

src/publisher.rs

@@ -16,10 +16,12 @@ use crate::errors;
 use crate::transmute::unwrap_ref_unchecked;
 use crate::transmute::unwrap_ref_unchecked_mut;
 use crate::transmute::Inplace;
+use crate::transmute::TransmuteCopy;
 use crate::transmute::TransmuteFromHandle;
 use crate::transmute::TransmuteIntoHandle;
 use crate::transmute::TransmuteRef;
 use crate::transmute::TransmuteUninitPtr;
+use crate::z_entity_global_id_t;
 use crate::z_owned_encoding_t;
 use crate::z_owned_source_info_t;
 use crate::z_timestamp_t;
@@ -270,6 +272,13 @@ pub extern "C" fn z_publisher_delete(
     }
 }
 
+/// Returns the ID of the publisher.
+#[no_mangle]
+pub extern "C" fn z_publisher_id(publisher: &z_loaned_publisher_t) -> z_entity_global_id_t {
+    let publisher = publisher.transmute_ref();
+    publisher.id().transmute_copy()
+}
+
 /// Returns the key expression of the publisher.
 #[no_mangle]
 pub extern "C" fn z_publisher_keyexpr(publisher: &z_loaned_publisher_t) -> &z_loaned_keyexpr_t {