You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.4 KiB
44 lines
1.4 KiB
use libc::c_uint;
|
|
use std::ffi::CString;
|
|
use std::ptr;
|
|
|
|
use ffi;
|
|
|
|
use error::{Result, lmdb_result};
|
|
|
|
/// A handle to an individual database in an environment.
|
|
///
|
|
/// A database handle denotes the name and parameters of a database in an environment.
|
|
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
|
|
pub struct Database {
|
|
dbi: ffi::MDB_dbi,
|
|
}
|
|
|
|
impl Database {
|
|
|
|
/// Opens a new database handle in the given transaction.
|
|
///
|
|
/// Prefer using `Environment::open_db`, `Environment::create_db`, `TransactionExt::open_db`,
|
|
/// or `RwTransaction::create_db`.
|
|
pub(crate) unsafe fn new(txn: *mut ffi::MDB_txn,
|
|
name: Option<&str>,
|
|
flags: c_uint)
|
|
-> Result<Database> {
|
|
let c_name = name.map(|n| CString::new(n).unwrap());
|
|
let name_ptr = if let Some(ref c_name) = c_name { c_name.as_ptr() } else { ptr::null() };
|
|
let mut dbi: ffi::MDB_dbi = 0;
|
|
lmdb_result(ffi::mdb_dbi_open(txn, name_ptr, flags, &mut dbi))?;
|
|
Ok(Database { dbi: dbi })
|
|
}
|
|
|
|
/// Returns the underlying LMDB database handle.
|
|
///
|
|
/// The caller **must** ensure that the handle is not used after the lifetime of the
|
|
/// environment, or after the database has been closed.
|
|
pub fn dbi(&self) -> ffi::MDB_dbi {
|
|
self.dbi
|
|
}
|
|
}
|
|
|
|
unsafe impl Sync for Database {}
|
|
unsafe impl Send for Database {}
|
|
|