Revision history for Data-Fenwick-Shared

0.05      2026-09-26
          - DATA_FENWICK_SHARED_SPARSE=0 reserves segments up front, so a full
            filesystem fails the constructor, not a later write.
          - A failed create no longer leaves a full-size file behind.
          - Checking a half-created file no longer allocates it on tmpfs.
          - Long paths no longer cut the reason from error messages.

0.04      2026-09-15
          - Recover a lock left ownerless by a corrupt file instead of hanging.
          - Fix a writer stall on ARM64 after readers release.

0.03      2026-08-12
          - A file left by an interrupted create is recovered, not refused.
          - freeze()/new_readonly(): sealed read-only mode, lock-free.
          - unlink() reports a failed removal; a missing file is no error.

0.02      2026-07-22
          - Add range-update mode (new_range / range_add).
          - Fix a use-after-free in merge() when a tied peer destroys the
            object; it now croaks.
          - 0.02 cannot open a 0.01 file.

0.01      2026-07-10
          - Initial release: shared-memory Fenwick tree over signed int64 with
            O(log n) update, prefix sum, range, set and find; file, anonymous
            or memfd; rwlock with dead-process recovery; merge.