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Diffstat (limited to 'minheap-internal.h')
-rw-r--r--minheap-internal.h24
1 files changed, 17 insertions, 7 deletions
diff --git a/minheap-internal.h b/minheap-internal.h
index 39e3946a..53b88886 100644
--- a/minheap-internal.h
+++ b/minheap-internal.h
@@ -46,7 +46,6 @@ static inline void min_heap_ctor(min_heap_t* s);
static inline void min_heap_dtor(min_heap_t* s);
static inline void min_heap_elem_init(struct event* e);
static inline int min_heap_elt_is_top(const struct event *e);
-static inline int min_heap_elem_greater(struct event *a, struct event *b);
static inline int min_heap_empty(min_heap_t* s);
static inline unsigned min_heap_size(min_heap_t* s);
static inline struct event* min_heap_top(min_heap_t* s);
@@ -56,12 +55,11 @@ static inline struct event* min_heap_pop(min_heap_t* s);
static inline int min_heap_adjust(min_heap_t *s, struct event* e);
static inline int min_heap_erase(min_heap_t* s, struct event* e);
static inline void min_heap_shift_up_(min_heap_t* s, unsigned hole_index, struct event* e);
+static inline void min_heap_shift_up_unconditional_(min_heap_t* s, unsigned hole_index, struct event* e);
static inline void min_heap_shift_down_(min_heap_t* s, unsigned hole_index, struct event* e);
-int min_heap_elem_greater(struct event *a, struct event *b)
-{
- return evutil_timercmp(&a->ev_timeout, &b->ev_timeout, >);
-}
+#define min_heap_elem_greater(a, b) \
+ (evutil_timercmp(&(a)->ev_timeout, &(b)->ev_timeout, >))
void min_heap_ctor(min_heap_t* s) { s->p = 0; s->n = 0; s->a = 0; }
void min_heap_dtor(min_heap_t* s) { if (s->p) mm_free(s->p); }
@@ -107,7 +105,7 @@ int min_heap_erase(min_heap_t* s, struct event* e)
to be less than the parent, it can't need to shift both up and
down. */
if (e->ev_timeout_pos.min_heap_idx > 0 && min_heap_elem_greater(s->p[parent], last))
- min_heap_shift_up_(s, e->ev_timeout_pos.min_heap_idx, last);
+ min_heap_shift_up_unconditional_(s, e->ev_timeout_pos.min_heap_idx, last);
else
min_heap_shift_down_(s, e->ev_timeout_pos.min_heap_idx, last);
e->ev_timeout_pos.min_heap_idx = -1;
@@ -125,7 +123,7 @@ int min_heap_adjust(min_heap_t *s, struct event *e)
/* The position of e has changed; we shift it up or down
* as needed. We can't need to do both. */
if (e->ev_timeout_pos.min_heap_idx > 0 && min_heap_elem_greater(s->p[parent], e))
- min_heap_shift_up_(s, e->ev_timeout_pos.min_heap_idx, e);
+ min_heap_shift_up_unconditional_(s, e->ev_timeout_pos.min_heap_idx, e);
else
min_heap_shift_down_(s, e->ev_timeout_pos.min_heap_idx, e);
return 0;
@@ -149,6 +147,18 @@ int min_heap_reserve(min_heap_t* s, unsigned n)
return 0;
}
+void min_heap_shift_up_unconditional_(min_heap_t* s, unsigned hole_index, struct event* e)
+{
+ unsigned parent = (hole_index - 1) / 2;
+ do
+ {
+ (s->p[hole_index] = s->p[parent])->ev_timeout_pos.min_heap_idx = hole_index;
+ hole_index = parent;
+ parent = (hole_index - 1) / 2;
+ } while (hole_index && min_heap_elem_greater(s->p[parent], e));
+ (s->p[hole_index] = e)->ev_timeout_pos.min_heap_idx = hole_index;
+}
+
void min_heap_shift_up_(min_heap_t* s, unsigned hole_index, struct event* e)
{
unsigned parent = (hole_index - 1) / 2;