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, 1 insertions, 1 deletions

diff --git a/src/test/test-install.c b/src/test/test-install.c
index 099eb401d7..b0f77a18f3 100644
--- a/src/test/test-install.c
+++ b/src/test/test-install.c
@@ -51,7 +51,7 @@ int main(int argc, char* argv[]) {
         UnitFileChange *changes = NULL;
         unsigned n_changes = 0;
 
-        h = hashmap_new(string_hash_func, string_compare_func);
+        h = hashmap_new(&string_hash_ops);
         r = unit_file_get_list(UNIT_FILE_SYSTEM, NULL, h);
         assert_se(r == 0);