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do not execute blocking fn if result is not required

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This commit is contained in:
Nikolay Kim 2019-03-07 19:31:17 -08:00
parent eef687ec80
commit 2f6df11183
1 changed files with 6 additions and 1 deletions
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7
src/blocking.rs
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@ -41,6 +41,7 @@ thread_local! {
}; };
} }
/// Blocking operation execution error
#[derive(Debug, Display)] #[derive(Debug, Display)]
pub enum BlockingError<E: fmt::Debug> { pub enum BlockingError<E: fmt::Debug> {
#[display(fmt = "{:?}", _0)] #[display(fmt = "{:?}", _0)]
@ -62,13 +63,17 @@ where
let (tx, rx) = oneshot::channel(); let (tx, rx) = oneshot::channel();
POOL.with(|pool| { POOL.with(|pool| {
pool.execute(move || { pool.execute(move || {
let _ = tx.send(f()); if !tx.is_canceled() {
let _ = tx.send(f());
}
}) })
}); });
CpuFuture { rx } CpuFuture { rx }
} }
/// Blocking operation completion future. It resolves with results
/// of blocking function execution.
pub struct CpuFuture<I, E> { pub struct CpuFuture<I, E> {
rx: oneshot::Receiver<Result<I, E>>, rx: oneshot::Receiver<Result<I, E>>,
} }