mmtkvdb

mmtkvdb is a crate for Rust which provides a memory-mapped key-value database. It uses LMDB and links with an existing liblmdb on the system.

API Documentation

For documentation on how to use this crate, refer to the example in src/lib.rs.

License

See contained LICENSE file (MIT License).

Changelog

• 2022-05-01:
  • Fixed build error on nightly Rust by importing core::ffi::{c_size_t, c_int, c_uint} for now instead of using std::ffi (see commit 07ea143f96 in Rust for explanation)
• 2022-04-30: Version 0.0.5
  • Method EnvRo::txn moved to Env trait and renamed to Env::txn_ro.
  • Method EnvRw::txn renamed to EnvRw::txn_rw.
  • Improved documentation of EnvRo and EnvRw (doc comment explains how to create them now, i.e. how to start a transaction)
• 2022-04-22: Version 0.0.4
  • No longer use PhantomData to store unit-like structs which indicate constraints on key uniqueness in DbOptions and Db (KeysUnique and KeysDuplicate are Copy now and contained directly)
  • Minor fixes in documentation
    • Changed argument name for passing DbOptions to Env::open_dbs
    • Added link to Sized in doc comment on private trait IsType
• 2022-04-16: Version 0.0.3
  • Avoid transmute on references: To avoid issues with (possible) future changes in Rust, the storable module doesn't use transmute on references anymore. Instead, std::slice::from_raw_parts, std::str::from_utf8_unchecked, and str::as_bytes() are used.
• 2022-04-11: Version 0.0.2
  • Moved Storable, StorableConstBytesLen, and StorableWithOwned traits to new (public) storable module (but Storable gets re-exported by crate-level module)
  • Added method to clear stale readers
  • Improved documentation on (un)safety
  • Avoid unnecessary re-alignment in some cases of u8 and i8
  • Make type bool storable (i.e. implement Storable for bool)
  • Added documentation comments for private items
  • Code cleanup (moved private IsType trait to helpers module)
• 2022-04-10: Version 0.0.1
  • First release