3 files changed, 17 insertions, 9 deletions
diff --git a/src/core/defs.h b/src/core/defs.h
index 6050782b..d559b490 100644
--- a/src/core/defs.h
+++ b/src/core/defs.h
@@ -12,6 +12,7 @@
 #define CORE_DEFS_H
 
 #include <stdint.h>
+#include <stdbool.h>
 
 // C compilers may get unhappy when named arguments are not used.  While
 // there are things like __attribute__((unused)) which are arguably
diff --git a/src/core/idhash.c b/src/core/idhash.c
index 306c751f..73763a07 100644
--- a/src/core/idhash.c
+++ b/src/core/idhash.c
@@ -389,3 +389,9 @@ nni_id_visit(nni_id_map *m, uint64_t *keyp, void **valp, uint32_t *cursor)
 	*cursor = index;
 	return (false);
 }
+
+uint32_t
+nni_id_count(const nni_id_map *m)
+{
+	return (m->id_count);
+}
diff --git a/src/core/idhash.h b/src/core/idhash.h
index 11cc7a08..b07404aa 100644
--- a/src/core/idhash.h
+++ b/src/core/idhash.h
@@ -46,15 +46,16 @@ struct nni_id_map {
 #define NNI_ID_FLAG_RANDOM 2   // start at a random value
 #define NNI_ID_FLAG_REGISTER 4 // map is registered for finalization
 
-extern void  nni_id_map_init(nni_id_map *, uint64_t, uint64_t, bool);
-extern void  nni_id_map_fini(nni_id_map *);
-extern void *nni_id_get(nni_id_map *, uint64_t);
-extern int   nni_id_set(nni_id_map *, uint64_t, void *);
-extern int   nni_id_alloc(nni_id_map *, uint64_t *, void *);
-extern int   nni_id_alloc32(nni_id_map *, uint32_t *, void *);
-extern int   nni_id_remove(nni_id_map *, uint64_t);
-extern void  nni_id_map_sys_fini(void);
-extern bool  nni_id_visit(nni_id_map *, uint64_t *, void **, uint32_t *);
+extern void     nni_id_map_init(nni_id_map *, uint64_t, uint64_t, bool);
+extern void     nni_id_map_fini(nni_id_map *);
+extern void    *nni_id_get(nni_id_map *, uint64_t);
+extern int      nni_id_set(nni_id_map *, uint64_t, void *);
+extern int      nni_id_alloc(nni_id_map *, uint64_t *, void *);
+extern int      nni_id_alloc32(nni_id_map *, uint32_t *, void *);
+extern int      nni_id_remove(nni_id_map *, uint64_t);
+extern void     nni_id_map_sys_fini(void);
+extern bool     nni_id_visit(nni_id_map *, uint64_t *, void **, uint32_t *);
+extern uint32_t nni_id_count(const nni_id_map *);
 
 #define NNI_ID_MAP_INITIALIZER(min, max, flags)            \
 	{                                                  \