diff options
| author | Rob Clark <[email protected]> | 2019-05-25 10:50:41 -0700 |
|---|---|---|
| committer | Rob Clark <[email protected]> | 2019-05-30 22:11:26 +0000 |
| commit | 372e83b95f9277fe1d09b1c65c70a38918843b6f (patch) | |
| tree | 7a2fdac4e55a2d6d3dda81e73f2efff96387aa97 /src/util | |
| parent | 03ce12c5ed7d1225d5aad8c10fccab2503920ec0 (diff) | |
list: add some iterator debug
Debugging use of unsafe iterators when you should have used the _safe
version sucks. Add some DEBUG build support to catch and assert if
someone does that.
I didn't update the UPPERCASE verions of the iterators. They should
probably be deprecated/removed.
Signed-off-by: Rob Clark <[email protected]>
Reviewed-by: Erik Faye-Lund <[email protected]>
Diffstat (limited to 'src/util')
| -rw-r--r-- | src/util/list.h | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/src/util/list.h b/src/util/list.h index 09d1b4cae64..96e2f24695c 100644 --- a/src/util/list.h +++ b/src/util/list.h @@ -43,6 +43,11 @@ #include <assert.h> #include "c99_compat.h" +#ifdef DEBUG +# define list_assert(cond, msg) assert(cond && msg) +#else +# define list_assert(cond, msg) (void)(0 && (cond)) +#endif struct list_head { @@ -212,21 +217,27 @@ static inline void list_validate(const struct list_head *list) pos = container_of(pos->member.prev, pos, member)) #define list_for_each_entry(type, pos, head, member) \ - for (type *pos = LIST_ENTRY(type, (head)->next, member); \ + for (type *pos = LIST_ENTRY(type, (head)->next, member), \ + *__next = LIST_ENTRY(type, pos->member.next, member); \ &pos->member != (head); \ - pos = LIST_ENTRY(type, pos->member.next, member)) + pos = LIST_ENTRY(type, pos->member.next, member), \ + list_assert(pos == __next, "use _safe iterator"), \ + __next = LIST_ENTRY(type, __next->member.next, member)) #define list_for_each_entry_safe(type, pos, head, member) \ for (type *pos = LIST_ENTRY(type, (head)->next, member), \ *__next = LIST_ENTRY(type, pos->member.next, member); \ &pos->member != (head); \ pos = __next, \ - __next = LIST_ENTRY(type, __next->member.next, member)) + __next = LIST_ENTRY(type, __next->member.next, member)) #define list_for_each_entry_rev(type, pos, head, member) \ - for (type *pos = LIST_ENTRY(type, (head)->prev, member); \ + for (type *pos = LIST_ENTRY(type, (head)->prev, member), \ + *__prev = LIST_ENTRY(type, pos->member.prev, member); \ &pos->member != (head); \ - pos = LIST_ENTRY(type, pos->member.prev, member)) + pos = LIST_ENTRY(type, pos->member.prev, member), \ + list_assert(pos == __prev, "use _safe iterator"), \ + __prev = LIST_ENTRY(type, __prev->member.prev, member)) #define list_for_each_entry_safe_rev(type, pos, head, member) \ for (type *pos = LIST_ENTRY(type, (head)->prev, member), \ |