Constant lmdb::NO_TLS

pub const NO_TLS: EnvironmentFlags = EnvironmentFlags{bits: MDB_NOTLS,}

Don't use thread-local storage. Tie reader locktable slots to transaction objects instead of to threads. I.e. RoTransaction::reset keeps the slot reseved for the transaction object. A thread may use parallel read-only transactions. A read-only transaction may span threads if the user synchronizes its use. Applications that multiplex many the user synchronizes its use. Applications that multiplex many user threads over individual OS threads need this option. Such an application must also serialize the write transactions in an OS thread, since LMDB's write locking is unaware of the user threads.