diff options
author | Eric Wong <e@80x24.org> | 2019-10-07 02:30:40 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2019-10-07 04:20:11 +0300 |
commit | c8e424c9c94d97b18cd335be17f32a8ce94a5b7f (patch) | |
tree | e8e652183caac5ad5943e423076585889b02d9b3 /hashmap.h | |
parent | 8a973d0bb398d6d83d6c048acecc750d01bd7234 (diff) |
hashmap: introduce hashmap_free_entries
`hashmap_free_entries' behaves like `container_of' and passes
the offset of the hashmap_entry struct to the internal
`hashmap_free_' function, allowing the function to free any
struct pointer regardless of where the hashmap_entry field
is located.
`hashmap_free' no longer takes any arguments aside from
the hashmap itself.
Signed-off-by: Eric Wong <e@80x24.org>
Reviewed-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'hashmap.h')
-rw-r--r-- | hashmap.h | 19 |
1 files changed, 13 insertions, 6 deletions
@@ -96,7 +96,7 @@ * } * * if (!strcmp("end", action)) { - * hashmap_free(&map, 1); + * hashmap_free_entries(&map, struct long2string, ent); * break; * } * } @@ -232,13 +232,20 @@ void hashmap_init(struct hashmap *map, const void *equals_function_data, size_t initial_size); +/* internal function for freeing hashmap */ +void hashmap_free_(struct hashmap *map, ssize_t offset); + /* - * Frees a hashmap structure and allocated memory. - * - * If `free_entries` is true, each hashmap_entry in the map is freed as well - * using stdlibs free(). + * Frees a hashmap structure and allocated memory, leaves entries undisturbed + */ +#define hashmap_free(map) hashmap_free_(map, -1) + +/* + * Frees @map and all entries. @type is the struct type of the entry + * where @member is the hashmap_entry struct used to associate with @map */ -void hashmap_free(struct hashmap *map, int free_entries); +#define hashmap_free_entries(map, type, member) \ + hashmap_free_(map, offsetof(type, member)); /* hashmap_entry functions */ |