hashmap: introduce hash_ops to make struct Hashmap smaller

It is redundant to store 'hash' and 'compare' function pointers in
struct Hashmap separately. The functions always comprise a pair.
Store a single pointer to struct hash_ops instead.

systemd keeps hundreds of hashmaps, so this saves a little bit of
memory.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/bus-proxyd/bus-policy.c b/src/bus-proxyd/bus-policy.c
index 06c16a7eb6..d2eace9405 100644
--- a/src/bus-proxyd/bus-policy.c
+++ b/src/bus-proxyd/bus-policy.c
@@ -338,7 +338,7 @@ static int file_load(Policy *p, const char *path) {
 
                                         assert_cc(sizeof(uid_t) == sizeof(uint32_t));
 
-                                        r = hashmap_ensure_allocated(&p->user_items, trivial_hash_func, trivial_compare_func);
+                                        r = hashmap_ensure_allocated(&p->user_items, NULL);
                                         if (r < 0)
                                                 return log_oom();
 
@@ -369,7 +369,7 @@ static int file_load(Policy *p, const char *path) {
 
                                         assert_cc(sizeof(gid_t) == sizeof(uint32_t));
 
-                                        r = hashmap_ensure_allocated(&p->group_items, trivial_hash_func, trivial_compare_func);
+                                        r = hashmap_ensure_allocated(&p->group_items, NULL);
                                         if (r < 0)
                                                 return log_oom();