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ruanhaishen
redis
Commits
ddc87eef
Commit
ddc87eef
authored
Aug 01, 2018
by
antirez
Browse files
Explain what's the point of zslUpdateScore() in top comment.
parent
741f29ea
Changes
1
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src/t_zset.c
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ddc87eef
...
@@ -249,6 +249,11 @@ int zslDelete(zskiplist *zsl, double score, sds ele, zskiplistNode **node) {
...
@@ -249,6 +249,11 @@ int zslDelete(zskiplist *zsl, double score, sds ele, zskiplistNode **node) {
* This function does not update the score in the hash table side, the
* This function does not update the score in the hash table side, the
* caller should take care of it.
* caller should take care of it.
*
*
* Note that this function attempts to just update the node, in case after
* the score update, the node would be exactly at the same position.
* Otherwise the skiplist is modified by removing and re-adding a new
* element, which is more costly.
*
* The function returns the updated element skiplist node pointer. */
* The function returns the updated element skiplist node pointer. */
zskiplistNode
*
zslUpdateScore
(
zskiplist
*
zsl
,
double
curscore
,
sds
ele
,
double
newscore
)
{
zskiplistNode
*
zslUpdateScore
(
zskiplist
*
zsl
,
double
curscore
,
sds
ele
,
double
newscore
)
{
zskiplistNode
*
update
[
ZSKIPLIST_MAXLEVEL
],
*
x
;
zskiplistNode
*
update
[
ZSKIPLIST_MAXLEVEL
],
*
x
;
...
...
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