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Importing rbtree changes from nJScript.

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This commit is contained in:
Igor Sysoev
2017-01-30 12:14:49 +03:00
parent ba0391577b
commit 952291c93c
6 changed files with 59 additions and 169 deletions
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6
src/nxt_event_timer.c
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@@ -22,7 +22,7 @@
* the changes array and should be used only if the timer memory must be freed.
*/
static nxt_int_t nxt_event_timer_rbtree_compare(nxt_rbtree_node_t *node1,
static intptr_t nxt_event_timer_rbtree_compare(nxt_rbtree_node_t *node1,
nxt_rbtree_node_t *node2);
static void nxt_event_timer_change(nxt_event_timers_t *timers,
nxt_event_timer_t *ev, nxt_msec_t time);
@@ -34,7 +34,7 @@ static void nxt_event_timer_drop_changes(nxt_event_timers_t *timers,
nxt_int_t
nxt_event_timers_init(nxt_event_timers_t *timers, nxt_uint_t mchanges)
{
nxt_rbtree_init(&timers->tree, nxt_event_timer_rbtree_compare, NULL);
nxt_rbtree_init(&timers->tree, nxt_event_timer_rbtree_compare);
timers->mchanges = mchanges;
@@ -48,7 +48,7 @@ nxt_event_timers_init(nxt_event_timers_t *timers, nxt_uint_t mchanges)
}
static nxt_int_t
static intptr_t
nxt_event_timer_rbtree_compare(nxt_rbtree_node_t *node1,
nxt_rbtree_node_t *node2)
{

6
src/nxt_mem_cache_pool.c
View File

@@ -123,7 +123,7 @@ static nxt_mem_cache_block_t *
nxt_mem_cache_alloc_cluster(nxt_mem_cache_pool_t *pool);
static void *nxt_mem_cache_alloc_large(nxt_mem_cache_pool_t *pool,
size_t alignment, size_t size);
static nxt_int_t nxt_mem_cache_rbtree_compare(nxt_rbtree_node_t *node1,
static intptr_t nxt_mem_cache_rbtree_compare(nxt_rbtree_node_t *node1,
nxt_rbtree_node_t *node2);
static nxt_mem_cache_block_t *nxt_mem_cache_find_block(nxt_rbtree_t *tree,
u_char *p);
@@ -202,7 +202,7 @@ nxt_mem_cache_pool_fast_create(size_t cluster_size, size_t page_alignment,
pool->chunk_size_shift = nxt_mem_cache_shift(min_chunk_size);
pool->page_size_shift = nxt_mem_cache_shift(page_size);
nxt_rbtree_init(&pool->pages, nxt_mem_cache_rbtree_compare, NULL);
nxt_rbtree_init(&pool->pages, nxt_mem_cache_rbtree_compare);
nxt_queue_init(&pool->free_pages);
}
@@ -572,7 +572,7 @@ nxt_mem_cache_alloc_large(nxt_mem_cache_pool_t *pool, size_t alignment,
}
static nxt_int_t
static intptr_t
nxt_mem_cache_rbtree_compare(nxt_rbtree_node_t *node1, nxt_rbtree_node_t *node2)
{
nxt_mem_cache_block_t *block1, *block2;

6
src/nxt_mem_zone.c
View File

@@ -138,7 +138,7 @@ static void *nxt_mem_zone_slots_init(nxt_mem_zone_t *zone,
nxt_uint_t page_size);
static void nxt_mem_zone_slot_init(nxt_mem_zone_slot_t *slot,
nxt_uint_t page_size);
static nxt_int_t nxt_mem_zone_rbtree_compare(nxt_rbtree_node_t *node1,
static intptr_t nxt_mem_zone_rbtree_compare(nxt_rbtree_node_t *node1,
nxt_rbtree_node_t *node2);
static void *nxt_mem_zone_alloc_small(nxt_mem_zone_t *zone,
nxt_mem_zone_slot_t *slot, size_t size);
@@ -204,7 +204,7 @@ nxt_mem_zone_init(u_char *start, size_t zone_size, nxt_uint_t page_size)
/* rbtree of free pages. */
nxt_rbtree_init(&zone->free_pages, nxt_mem_zone_rbtree_compare, NULL);
nxt_rbtree_init(&zone->free_pages, nxt_mem_zone_rbtree_compare);
block = (nxt_mem_zone_free_block_t *) zone->start;
block->size = pages;
@@ -391,7 +391,7 @@ nxt_next_highest_power_of_two(uint32_t n)
}
static nxt_int_t
static intptr_t
nxt_mem_zone_rbtree_compare(nxt_rbtree_node_t *node1, nxt_rbtree_node_t *node2)
{
u_char *start1, *end1, *start2, *end2;

73
src/nxt_rbtree.c
View File

@@ -26,23 +26,13 @@ nxt_inline void nxt_rbtree_parent_relink(nxt_rbtree_node_t *subst,
#define NXT_RBTREE_RED 1
#define nxt_rbtree_set_callback_type(tree, type) \
(tree)->sentinel.spare = type
#define nxt_rbtree_has_insertion_callback(tree) \
((tree)->sentinel.spare != 0)
#define nxt_rbtree_comparison_callback(tree) \
((nxt_rbtree_compare_t) (tree)->sentinel.right)
void
nxt_rbtree_init(nxt_rbtree_t *tree, nxt_rbtree_compare_t compare,
nxt_rbtree_insert_t insert)
nxt_rbtree_init(nxt_rbtree_t *tree, nxt_rbtree_compare_t compare)
{
void *callback;
nxt_bool_t insertion;
/*
* The sentinel is used as a leaf node sentinel and as a tree root
* sentinel: it is a parent of a root node and the root node is
@@ -56,13 +46,10 @@ nxt_rbtree_init(nxt_rbtree_t *tree, nxt_rbtree_compare_t compare,
tree->sentinel.left = &tree->sentinel;
/*
* The sentinel's right child is never used so either insertion
* or comparison callback can be safely stored here.
* The sentinel's right child is never used so
* comparison callback can be safely stored here.
*/
insertion = (insert != NULL);
nxt_rbtree_set_callback_type(tree, insertion);
callback = insertion ? (void *) insert : (void *) compare;
tree->sentinel.right = callback;
tree->sentinel.right = (void *) compare;
/* The root and leaf sentinel must be black. */
tree->sentinel.color = NXT_RBTREE_BLACK;
@@ -72,9 +59,7 @@ nxt_rbtree_init(nxt_rbtree_t *tree, nxt_rbtree_compare_t compare,
void
nxt_rbtree_insert(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
{
void *callback;
nxt_rbtree_node_t *node, *new_node, *sentinel, **child;
nxt_rbtree_insert_t insert;
nxt_rbtree_compare_t compare;
new_node = (nxt_rbtree_node_t *) part;
@@ -86,32 +71,21 @@ nxt_rbtree_insert(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
new_node->right = sentinel;
new_node->color = NXT_RBTREE_RED;
callback = tree->sentinel.right;
compare = (nxt_rbtree_compare_t) tree->sentinel.right;
child = &nxt_rbtree_root(tree);
if (nxt_rbtree_has_insertion_callback(tree)) {
insert = (nxt_rbtree_insert_t) callback;
while (*child != sentinel) {
node = *child;
insert(node, new_node, sentinel);
nxt_prefetch(node->left);
nxt_prefetch(node->right);
} else {
compare = (nxt_rbtree_compare_t) callback;
child = &nxt_rbtree_root(tree);
while (*child != sentinel) {
node = *child;
nxt_prefetch(node->left);
nxt_prefetch(node->right);
child = (compare(new_node, node) < 0) ? &node->left : &node->right;
}
*child = new_node;
new_node->parent = node;
child = (compare(new_node, node) < 0) ? &node->left : &node->right;
}
*child = new_node;
new_node->parent = node;
nxt_rbtree_insert_fixup(new_node);
node = nxt_rbtree_root(tree);
@@ -158,8 +132,12 @@ nxt_rbtree_insert_fixup(nxt_rbtree_node_t *node)
grandparent = parent->parent;
grandparent->color = NXT_RBTREE_RED;
nxt_rbtree_right_rotate(grandparent);
continue;
/*
* nxt_rbtree_right_rotate() does not change node->parent
* color which is now black, so testing color is not required
* to return from function.
*/
return;
}
} else {
@@ -179,7 +157,8 @@ nxt_rbtree_insert_fixup(nxt_rbtree_node_t *node)
grandparent->color = NXT_RBTREE_RED;
nxt_rbtree_left_rotate(grandparent);
continue;
/* See the comment in the symmetric branch above. */
return;
}
}
@@ -195,7 +174,7 @@ nxt_rbtree_insert_fixup(nxt_rbtree_node_t *node)
nxt_rbtree_node_t *
nxt_rbtree_find(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
{
nxt_int_t n;
intptr_t n;
nxt_rbtree_node_t *node, *next, *sentinel;
nxt_rbtree_compare_t compare;
@@ -229,7 +208,7 @@ nxt_rbtree_find(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
nxt_rbtree_node_t *
nxt_rbtree_find_less_or_equal(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
{
nxt_int_t n;
intptr_t n;
nxt_rbtree_node_t *node, *retval, *next, *sentinel;
nxt_rbtree_compare_t compare;
@@ -266,7 +245,7 @@ nxt_rbtree_find_less_or_equal(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
nxt_rbtree_node_t *
nxt_rbtree_find_greater_or_equal(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
{
nxt_int_t n;
intptr_t n;
nxt_rbtree_node_t *node, *retval, *next, *sentinel;
nxt_rbtree_compare_t compare;
@@ -303,7 +282,7 @@ nxt_rbtree_find_greater_or_equal(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
void
nxt_rbtree_delete(nxt_rbtree_t *tree, nxt_rbtree_part_t *part)
{
nxt_uint_t color;
uint8_t color;
nxt_rbtree_node_t *node, *sentinel, *subst, *child;
node = (nxt_rbtree_node_t *) part;

40
src/nxt_rbtree.h
View File

@@ -11,44 +11,44 @@
typedef struct nxt_rbtree_node_s nxt_rbtree_node_t;
struct nxt_rbtree_node_s {
nxt_rbtree_node_t *left;
nxt_rbtree_node_t *right;
nxt_rbtree_node_t *parent;
nxt_rbtree_node_t *left;
nxt_rbtree_node_t *right;
nxt_rbtree_node_t *parent;
uint8_t color;
uint8_t spare;
uint8_t color;
};
typedef struct {
nxt_rbtree_node_t *left;
nxt_rbtree_node_t *right;
nxt_rbtree_node_t *parent;
nxt_rbtree_node_t *left;
nxt_rbtree_node_t *right;
nxt_rbtree_node_t *parent;
} nxt_rbtree_part_t;
#define NXT_RBTREE_NODE(node) \
nxt_rbtree_part_t node; \
uint8_t color
nxt_rbtree_part_t node; \
uint8_t node##_color
#define NXT_RBTREE_NODE_INIT { NULL, NULL, NULL }, 0
typedef struct {
nxt_rbtree_node_t sentinel;
nxt_rbtree_node_t sentinel;
} nxt_rbtree_t;
typedef void (*nxt_rbtree_insert_t)(nxt_rbtree_node_t *root,
nxt_rbtree_node_t *node, nxt_rbtree_node_t *sentinel);
typedef nxt_int_t (*nxt_rbtree_compare_t)(nxt_rbtree_node_t *node1,
/*
* A comparison function should return intptr_t result because
* this eliminates overhead required to implement correct addresses
* comparison without result truncation.
*/
typedef intptr_t (*nxt_rbtree_compare_t)(nxt_rbtree_node_t *node1,
nxt_rbtree_node_t *node2);
#define \
nxt_rbtree_root(tree) \
#define nxt_rbtree_root(tree) \
((tree)->sentinel.left)
@@ -105,14 +105,14 @@ nxt_rbtree_node_successor(nxt_rbtree_t *tree, nxt_rbtree_node_t *node)
NXT_EXPORT void nxt_rbtree_init(nxt_rbtree_t *tree,
nxt_rbtree_compare_t compare, nxt_rbtree_insert_t insert);
nxt_rbtree_compare_t compare);
NXT_EXPORT void nxt_rbtree_insert(nxt_rbtree_t *tree, nxt_rbtree_part_t *node);
NXT_EXPORT nxt_rbtree_node_t *nxt_rbtree_find(nxt_rbtree_t *tree,
nxt_rbtree_part_t *node);
NXT_EXPORT nxt_rbtree_node_t *nxt_rbtree_find_less_or_equal(nxt_rbtree_t *tree,
nxt_rbtree_part_t *node);
NXT_EXPORT nxt_rbtree_node_t *
nxt_rbtree_find_greater_or_equal(nxt_rbtree_t *tree,
NXT_EXPORT nxt_rbtree_node_t
*nxt_rbtree_find_greater_or_equal(nxt_rbtree_t *tree,
nxt_rbtree_part_t *node);
NXT_EXPORT void nxt_rbtree_delete(nxt_rbtree_t *tree, nxt_rbtree_part_t *node);