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extern crate stm;
extern crate transaction;
use transaction::Transaction;
use stm::Transaction as Stm;
pub fn run<T, Tx>(tx: &Tx) -> T
where
Tx: Transaction<Ctx = Stm, Item = T, Err = stm::StmError>,
{
Stm::with(|stm| tx.run(stm))
}
pub fn with_tx<F, T, E>(f: F) -> WithTx<F>
where
F: Fn(&mut Stm) -> Result<T, E>,
{
WithTx { f: f }
}
pub struct WithTx<F> {
f: F,
}
impl<F, T, E> Transaction for WithTx<F>
where
F: Fn(&mut Stm) -> Result<T, E>,
{
type Ctx = Stm;
type Item = T;
type Err = E;
fn run(&self, ctx: &mut Self::Ctx) -> Result<Self::Item, Self::Err> {
let WithTx { ref f } = *self;
f(ctx)
}
}