gotosocial/vendor/codeberg.org/gruf/go-structr/item.go
kim 84279f6a6a
[performance] cache more database calls, reduce required database calls overall (#3290)
* improvements to caching for lists and relationship to accounts / follows

* fix nil panic in AddToList()

* ensure list related caches are correctly invalidated

* ensure returned ID lists are ordered correctly

* bump go-structr to v0.8.9 (returns early if zero uncached keys to be loaded)

* remove zero checks in uncached key load functions (go-structr now handles this)

* fix issues after rebase on upstream/main

* update the expected return order of CSV exports (since list entries are now down by entry creation date)

* rename some funcs, allow deleting list entries for multiple follow IDs at a time, fix up more tests

* use returning statements on delete to get cache invalidation info

* fixes to recent database delete changes

* fix broken list entries delete sql

* remove unused db function

* update remainder of delete functions to behave in similar way, some other small tweaks

* fix delete user sql, allow returning on err no entries

* uncomment + fix list database tests

* update remaining list tests

* update envparsing test

* add comments to each specific key being invalidated

* add more cache invalidation explanatory comments

* whoops; actually delete poll votes from database in the DeletePollByID() func

* remove added but-commented-out field

* improved comment regarding paging being disabled

* make cache invalidation comments match what's actually happening

* fix up delete query comments to match what is happening

* rename function to read a bit better

* don't use ErrNoEntries on delete when not needed (it's only needed for a RETURNING call)

* update function name in test

* move list exclusivity check to AFTER eligibility check. use log.Panic() instead of panic()

* use the poll_id column in poll_votes for selecting votes in poll ID

* fix function name
2024-09-16 16:46:09 +00:00

62 lines
1.3 KiB
Go

package structr
import (
"sync"
"unsafe"
)
type indexed_item struct {
// linked list elem this item
// is stored in a main list.
elem list_elem
// cached data with type.
data interface{}
// indexed stores the indices
// this item is stored under.
indexed []*index_entry
}
var indexed_item_pool sync.Pool
// new_indexed_item returns a new prepared indexed_item.
func new_indexed_item() *indexed_item {
v := indexed_item_pool.Get()
if v == nil {
v = new(indexed_item)
}
item := v.(*indexed_item)
ptr := unsafe.Pointer(item)
item.elem.data = ptr
return item
}
// free_indexed_item releases the indexed_item.
func free_indexed_item(item *indexed_item) {
item.elem.data = nil
item.indexed = item.indexed[:0]
item.data = nil
indexed_item_pool.Put(item)
}
// drop_index will drop the given index entry from item's indexed.
func (i *indexed_item) drop_index(entry *index_entry) {
for x := 0; x < len(i.indexed); x++ {
if i.indexed[x] != entry {
// Prof. Obiwan:
// this is not the index
// we are looking for.
continue
}
// Unset tptr value to
// ensure GC can take it.
i.indexed[x] = nil
// Move all index entries down + reslice.
_ = copy(i.indexed[x:], i.indexed[x+1:])
i.indexed = i.indexed[:len(i.indexed)-1]
break
}
}