lib, bgpd: Enhance `srv6_locator_chunk_free()` API

A programmer can use the `srv6_locator_chunk_free()` function to free
the memory allocated for a `struct srv6_locator_chunk`.

The programmer invokes `srv6_locator_chunk_free()` by passing a single
pointer to the `struct srv6_locator_chunk` to be freed.
`srv6_locator_chunk_free()` uses `XFREE()` to free the memory.
It is the responsibility of the programmer to set the
`struct srv6_locator_chunk` pointer to NULL after freeing memory with
`srv6_locator_chunk_free()`.

This commit modifies the `srv6_locator_chunk_free()` function to take a
double pointer instead of a single pointer. In this way, setting the
`struct srv6_locator_chunk` pointer to NULL is no longer the
programmer's responsibility but is the responsibility of
`srv6_locator_chunk_free()`. This prevents programmers from making
mistakes such as forgetting to set the pointer to NULL after invoking
`srv6_locator_chunk_free()`.

Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/srv6.c b/lib/srv6.c
index 306d92ae3..a8ec6f2b7 100644
--- a/lib/srv6.c
+++ b/lib/srv6.c
@@ -157,9 +157,9 @@ void srv6_locator_free(struct srv6_locator *locator)
 	}
 }
 
-void srv6_locator_chunk_free(struct srv6_locator_chunk *chunk)
+void srv6_locator_chunk_free(struct srv6_locator_chunk **chunk)
 {
-	XFREE(MTYPE_SRV6_LOCATOR_CHUNK, chunk);
+	XFREE(MTYPE_SRV6_LOCATOR_CHUNK, *chunk);
 }
 
 json_object *srv6_locator_chunk_json(const struct srv6_locator_chunk *chunk)