Messages in this thread Patch in this message | | | From | Danilo Krummrich <> | Subject | [PATCH drm-next v5 02/14] maple_tree: split up MA_STATE() macro | Date | Tue, 20 Jun 2023 02:42:05 +0200 |
| |
Split up the MA_STATE() macro such that components using the maple tree can easily inherit from struct ma_state and build custom tree walk macros to hide their internals from users.
Example:
struct sample_iterator { struct ma_state mas; struct sample_mgr *mgr; };
\#define SAMPLE_ITERATOR(name, __mgr, start) \ struct sample_iterator name = { \ .mas = MA_STATE_INIT(&(__mgr)->mt, start, 0), \ .mgr = __mgr, \ }
\#define sample_iter_for_each_range(it__, entry__, end__) \ mas_for_each(&(it__).mas, entry__, end__)
--
struct sample *sample; SAMPLE_ITERATOR(si, min);
sample_iter_for_each_range(&si, sample, max) { frob(mgr, sample); }
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Signed-off-by: Danilo Krummrich <dakr@redhat.com> --- include/linux/maple_tree.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 1fadb5f5978b..87d55334f1c2 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -423,8 +423,8 @@ struct ma_wr_state { #define MA_ERROR(err) \ ((struct maple_enode *)(((unsigned long)err << 2) | 2UL)) -#define MA_STATE(name, mt, first, end) \ - struct ma_state name = { \ +#define MA_STATE_INIT(mt, first, end) \ + { \ .tree = mt, \ .index = first, \ .last = end, \ @@ -435,6 +435,9 @@ struct ma_wr_state { .mas_flags = 0, \ } +#define MA_STATE(name, mt, first, end) \ + struct ma_state name = MA_STATE_INIT(mt, first, end) + #define MA_WR_STATE(name, ma_state, wr_entry) \ struct ma_wr_state name = { \ .mas = ma_state, \ -- 2.40.1
| |