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mirror of https://github.com/status-im/nimbus-eth1.git synced 2025-01-29 13:35:38 +00:00
Jordan Hrycaj 7becf4e389
Remove vertex ID recycle function ()
why:
  It is not safe in general to recycle vertex IDs while the `RocksDb`
  cache has `VertexID` rather than `RootedVertexID` where the former
  type seems preferable.

  In some fringe cases one might remove a vertex with key `(root1,vid)`
  and insert another vertex with key `(root2,vid)` while re-using the
  vertex ID `vid`. Without knowledge of `root1` and `root2`, the LRU
  cache will return the same vertex for `(root2,vid)` also for
  `(root1,vid)`.
2024-08-12 20:56:15 +00:00

35 lines
1.1 KiB
Nim

# nimbus-eth1
# Copyright (c) 2023-2024 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
# http://www.apache.org/licenses/LICENSE-2.0)
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
# http://opensource.org/licenses/MIT)
# at your option. This file may not be copied, modified, or distributed
# except according to those terms.
## Handle vertex IDs on the layered Aristo DB delta architecture
## =============================================================
##
{.push raises: [].}
import
./aristo_desc
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
proc vidFetch*(db: AristoDbRef): VertexID =
## Fetch next vertex ID.
##
if db.top.vTop == 0:
db.top.vTop = VertexID(LEAST_FREE_VID)
else:
db.top.vTop.inc
db.top.vTop
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------