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, 2 deletions

diff --git a/src/journal/catalog.h b/src/journal/catalog.h
index fdde67aeed..a72ecf6de7 100644
--- a/src/journal/catalog.h
+++ b/src/journal/catalog.h
@@ -28,11 +28,10 @@
 #include "strbuf.h"
 
 int catalog_import_file(Hashmap *h, struct strbuf *sb, const char *path);
-unsigned long catalog_hash_func(const void *p, const uint8_t hash_key[HASH_KEY_SIZE]);
-int catalog_compare_func(const void *a, const void *b) _pure_;
 int catalog_update(const char* database, const char* root, const char* const* dirs);
 int catalog_get(const char* database, sd_id128_t id, char **data);
 int catalog_list(FILE *f, const char* database, bool oneline);
 int catalog_list_items(FILE *f, const char* database, bool oneline, char **items);
 int catalog_file_lang(const char *filename, char **lang);
 extern const char * const catalog_file_dirs[];
+extern const struct hash_ops catalog_hash_ops;