Module lock 

Single-writer ownership via a process-local registry and fcntl lock.

POSIX record locks are not inherited across fork, but same-process locks do not conflict and closing any descriptor for the lock file releases them. The registry preserves same-process exclusion. Nothing else in this process may open STORE_LOCK_FILE.

Structs

StoreLock

Exclusive writer ownership automatically released when the process dies.

Enums

StoreLockError

Failure to open or acquire the single-writer lock.

Constants

STORE_LOCK_FILE

Persistent lock filename; only StoreLock may open this file.