returns the key corresponding to the allocation.

Item accessors

return the nTh in the chain from the beginning. n = 0 is the first in the chain and last inserted.

Gets the priority this region is assigned.

Returns the raw refcount with control bits and flags

getter functions

Helper to create a TryHandleMakerFn for tests. All acquisitions succeed.

number of hash functions per filter

Number of advised away slabs that can be reclaimed by calling reclaimSlab()

Configure the size of the metadata partition reserved for Navy

Switch to the currently unused cohort, and wait for all readers to drain from the old cohort

sort rankings for current round and update smoothed rankings

Allocate memory for a key of known size; this will claim the memory until the handle is dropped or inserted into the cache. Note that if you do not i

Count down without waiitng.

* This is the core eventually routine. The others are implemented * by calling this one. */

Grab a refcounted handle to the item. @param cache the cache instance using nvmcache @param key the key to look up in the access container @retur

return the total memory advised away

Retrieve and remove the timestamp for the given key hash. Returns std::nullopt if not found.

unix timestamp when the cache was created. If 0, the cache creation time was not recorded from the older version of the binary. @return time when th

@return the time when the item is going to expire in seconds since epoch format.

Get the total number of keys inserted into the hash table

Returns the total number of placeholders

static function to make sure the item size is at least sizeof CacheValue so we have enough space for fields used by sanity checks

* Overrides from GenericPiecesBase */

Checks if the region has buffer attached.

true if the compressed ptr expands to nullptr.

Whether this cache allocator was created on shared memory.

Should be called when all working threads are finished, or aborted

number of bits per filter