diff options
| -rw-r--r-- | thunk.h | 17 |
1 files changed, 7 insertions, 10 deletions
@@ -706,25 +706,22 @@ struct thunk_t { * * After the thunked function returns, the instance is automatically freed, * including any payload if THUNK_ALLOC() was used. + * + * The thunk may suppress automatic freeing by returning 1 (or anything > 0), + * giving the callee ability to influence instance life-cycle. This is + * important for iterators/visitor patterns where the thunk should be reused + * until either finding a desired entry or reaching the end. */ static inline int thunk_dispatch(thunk_t *thunk) { int r; r = thunk->dispatch(thunk); - thunk->free(thunk); + if (r <= 0) + thunk->free(thunk); return r; } -/* Same as thunk_dispatch() but without the free. - * Callers can trivially free thunk instances w/thunk_free(). - * So when a thunk needs to be used repeatedly in a loop for instance, use - * this, then just free the thunk yourself. - */ -static inline int thunk_dispatch_keep(thunk_t *thunk) { - return thunk->dispatch(thunk); -} - static inline void thunk_free(thunk_t *thunk) { return thunk->free(thunk); } |