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Rename cond() to try_op()

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This commit is contained in:
Ruihan Li
2024-11-01 20:02:58 +08:00
committed by Tate, Hongliang Tian
parent 50773de35f
commit efd49a96e3
1 changed files with 8 additions and 8 deletions
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16
kernel/src/process/signal/poll.rs
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@ -247,28 +247,28 @@ pub trait Pollable {
/// Waits for events and performs event-based operations.
///
/// If a call to `cond()` succeeds or fails with an error code other than `EAGAIN`, the method
/// will return whatever the call to `cond()` returns. Otherwise, the method will wait for some
/// interesting events specified in `mask` to happen and try again.
/// If a call to `try_op()` succeeds or fails with an error code other than `EAGAIN`, the
/// method will return whatever the call to `try_op()` returns. Otherwise, the method will wait
/// for some interesting events specified in `mask` to happen and try again.
///
/// This method will fail with `ETIME` if the timeout is specified and the event does not occur
/// before the timeout expires.
///
/// The user must ensure that a call to `cond()` does not fail with `EAGAIN` when the
/// The user must ensure that a call to `try_op()` does not fail with `EAGAIN` when the
/// interesting events occur. However, it is allowed to have spurious `EAGAIN` failures due to
/// race conditions where the events are consumed by another thread.
/// race opitions where the events are consumed by another thread.
fn wait_events<F, R>(
&self,
mask: IoEvents,
timeout: Option<&Duration>,
mut cond: F,
mut try_op: F,
) -> Result<R>
where
Self: Sized,
F: FnMut() -> Result<R>,
{
// Fast path: Return immediately if the operation gives a result.
match cond() {
match try_op() {
Err(err) if err.error() == Errno::EAGAIN => (),
result => return result,
}
@ -286,7 +286,7 @@ pub trait Pollable {
loop {
// Try again after the event happens.
match cond() {
match try_op() {
Err(err) if err.error() == Errno::EAGAIN => (),
result => return result,
};