Description
Ensures one instance per id and tracks how many owners currently use that instance.
When the reference count reaches zero, the instance is removed and teardown hooks run.
Parameters
TIdgeneric type parameter
Identifier key used to reuse one instance per id.
TDatageneric type parameter
Input data required to create or resolve an instance.
TInstancegeneric type parameter
Managed runtime instance type.
Return type
create(data) returns { referenceCount, instance, id }.
release(id) returns { referenceCount, instance | null }.
Usage notes
create(data) increments ref count and returns existing or newly created instance.
release(id) decrements ref count and triggers cleanup when it reaches zero.
