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[nginx] Core: added the ngx_rbtree_data() macro.

Vladimir Homutov
June 21, 2021 11:00AM
details: https://hg.nginx.org/nginx/rev/0c5e84096d99
branches:
changeset: 7875:0c5e84096d99
user: Vladimir Homutov <vl@nginx.com>
date: Mon Jun 21 09:42:43 2021 +0300
description:
Core: added the ngx_rbtree_data() macro.

diffstat:

src/core/ngx_rbtree.h | 3 +++
src/core/ngx_resolver.c | 4 +---
src/event/ngx_event_timer.c | 4 ++--
3 files changed, 6 insertions(+), 5 deletions(-)

diffs (48 lines):

diff -r d1079d6b2f19 -r 0c5e84096d99 src/core/ngx_rbtree.h
--- a/src/core/ngx_rbtree.h Fri Jun 18 04:00:21 2021 +0300
+++ b/src/core/ngx_rbtree.h Mon Jun 21 09:42:43 2021 +0300
@@ -47,6 +47,9 @@ struct ngx_rbtree_s {
(tree)->sentinel = s; \
(tree)->insert = i

+#define ngx_rbtree_data(node, type, link) \
+ (type *) ((u_char *) (node) - offsetof(type, link))
+

void ngx_rbtree_insert(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
void ngx_rbtree_delete(ngx_rbtree_t *tree, ngx_rbtree_node_t *node);
diff -r d1079d6b2f19 -r 0c5e84096d99 src/core/ngx_resolver.c
--- a/src/core/ngx_resolver.c Fri Jun 18 04:00:21 2021 +0300
+++ b/src/core/ngx_resolver.c Mon Jun 21 09:42:43 2021 +0300
@@ -51,9 +51,7 @@ typedef struct {
} ngx_resolver_an_t;


-#define ngx_resolver_node(n) \
- (ngx_resolver_node_t *) \
- ((u_char *) (n) - offsetof(ngx_resolver_node_t, node))
+#define ngx_resolver_node(n) ngx_rbtree_data(n, ngx_resolver_node_t, node)


static ngx_int_t ngx_udp_connect(ngx_resolver_connection_t *rec);
diff -r d1079d6b2f19 -r 0c5e84096d99 src/event/ngx_event_timer.c
--- a/src/event/ngx_event_timer.c Fri Jun 18 04:00:21 2021 +0300
+++ b/src/event/ngx_event_timer.c Mon Jun 21 09:42:43 2021 +0300
@@ -73,7 +73,7 @@ ngx_event_expire_timers(void)
return;
}

- ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer));
+ ev = ngx_rbtree_data(node, ngx_event_t, timer);

ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
"event timer del: %d: %M",
@@ -113,7 +113,7 @@ ngx_event_no_timers_left(void)
node;
node = ngx_rbtree_next(&ngx_event_timer_rbtree, node))
{
- ev = (ngx_event_t *) ((char *) node - offsetof(ngx_event_t, timer));
+ ev = ngx_rbtree_data(node, ngx_event_t, timer);

if (!ev->cancelable) {
return NGX_AGAIN;
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Subject Author Views Posted

[nginx] Core: added the ngx_rbtree_data() macro.

Vladimir Homutov 182 June 21, 2021 11:00AM



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