[−][src]Struct lmdb_sys::MDB_val
@brief Generic structure used for passing keys and data in and out of the database.
Values returned from the database are valid only until a subsequent update operation, or the end of the transaction. Do not modify or free them, they commonly point into the database itself.
Key sizes must be between 1 and #mdb_env_get_maxkeysize() inclusive. The same applies to data sizes in databases with the #MDB_DUPSORT flag. Other data items can in theory be from 0 to 0xffffffff bytes long.
Fields
mv_size: usize
< size of the data item
mv_data: *mut c_void
< address of the data item
Auto Trait Implementations
impl !Send for MDB_val
impl Unpin for MDB_val
impl !Sync for MDB_val
impl UnwindSafe for MDB_val
impl RefUnwindSafe for MDB_val
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> From<T> for T
[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,