SQLITE_SHM_NLOCK(3) Library Functions Manual SQLITE_SHM_NLOCK(3)

SQLITE_SHM_NLOCK
Maximum xShmLock index

#define SQLITE_SHM_NLOCK

The xShmLock method on sqlite3_io_methods may use values between 0 and this upper bound as its "offset" argument. The SQLite core will never attempt to acquire or release a lock outside of this range

sqlite3_io_methods(3)
December 19, 2018 NetBSD 9.2