prioq: make prioq_ensure_put() type safe

src/basic/prioq.c

@@ -169,7 +169,7 @@ int prioq_put(Prioq *q, void *data, unsigned *idx) {
         return 0;
 }
 
-int prioq_ensure_put(Prioq **q, compare_func_t compare_func, void *data, unsigned *idx) {
+int _prioq_ensure_put(Prioq **q, compare_func_t compare_func, void *data, unsigned *idx) {
         int r;
 
         r = prioq_ensure_allocated(q, compare_func);

src/basic/prioq.h

@@ -16,7 +16,13 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(Prioq*, prioq_free);
 int prioq_ensure_allocated(Prioq **q, compare_func_t compare_func);
 
 int prioq_put(Prioq *q, void *data, unsigned *idx);
-int prioq_ensure_put(Prioq **q, compare_func_t compare_func, void *data, unsigned *idx);
+int _prioq_ensure_put(Prioq **q, compare_func_t compare_func, void *data, unsigned *idx);
+#define prioq_ensure_put(q, compare_func, data, idx)                    \
+        ({                                                              \
+                int (*_func_)(const typeof((data)[0])*, const typeof((data)[0])*) = compare_func; \
+                _prioq_ensure_put(q, (compare_func_t) _func_, data, idx); \
+        })
+
 int prioq_remove(Prioq *q, void *data, unsigned *idx);
 void prioq_reshuffle(Prioq *q, void *data, unsigned *idx);
 

src/libsystemd-network/lldp-neighbor.c

@@ -37,9 +37,7 @@ DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
         sd_lldp_neighbor,
         lldp_neighbor_unlink);
 
-int lldp_neighbor_prioq_compare_func(const void *a, const void *b) {
-        const sd_lldp_neighbor *x = a, *y = b;
-
+int lldp_neighbor_prioq_compare_func(const sd_lldp_neighbor *x, const sd_lldp_neighbor *y) {
         assert(x);
         assert(y);
 

src/libsystemd-network/lldp-neighbor.h

@@ -84,7 +84,7 @@ static inline void* LLDP_NEIGHBOR_TLV_DATA(const sd_lldp_neighbor *n) {
 
 extern const struct hash_ops lldp_neighbor_hash_ops;
 int lldp_neighbor_id_compare_func(const LLDPNeighborID *x, const LLDPNeighborID *y);
-int lldp_neighbor_prioq_compare_func(const void *a, const void *b);
+int lldp_neighbor_prioq_compare_func(const sd_lldp_neighbor *x, const sd_lldp_neighbor *y);
 
 sd_lldp_neighbor *lldp_neighbor_unlink(sd_lldp_neighbor *n);
 sd_lldp_neighbor *lldp_neighbor_new(size_t raw_size);