mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 19:43:43 -04:00
4092e1b412
The kernel's `Delta` type was not available when the `wait_on` function was introduced. Now that it is, switch to it as it is more compact than `Duration` and cannot panic. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Link: https://lore.kernel.org/r/20250624-nova-delta-v1-1-b37d75a593ac@nvidia.com Signed-off-by: Danilo Krummrich <dakr@kernel.org>
48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
// SPDX-License-Identifier: GPL-2.0
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use kernel::prelude::*;
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use kernel::time::{Delta, Instant};
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pub(crate) const fn to_lowercase_bytes<const N: usize>(s: &str) -> [u8; N] {
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let src = s.as_bytes();
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let mut dst = [0; N];
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let mut i = 0;
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while i < src.len() && i < N {
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dst[i] = (src[i] as char).to_ascii_lowercase() as u8;
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i += 1;
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}
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dst
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}
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pub(crate) const fn const_bytes_to_str(bytes: &[u8]) -> &str {
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match core::str::from_utf8(bytes) {
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Ok(string) => string,
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Err(_) => kernel::build_error!("Bytes are not valid UTF-8."),
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}
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}
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/// Wait until `cond` is true or `timeout` elapsed.
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///
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/// When `cond` evaluates to `Some`, its return value is returned.
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///
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/// `Err(ETIMEDOUT)` is returned if `timeout` has been reached without `cond` evaluating to
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/// `Some`.
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///
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/// TODO[DLAY]: replace with `read_poll_timeout` once it is available.
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/// (https://lore.kernel.org/lkml/20250220070611.214262-8-fujita.tomonori@gmail.com/)
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pub(crate) fn wait_on<R, F: Fn() -> Option<R>>(timeout: Delta, cond: F) -> Result<R> {
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let start_time = Instant::now();
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loop {
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if let Some(ret) = cond() {
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return Ok(ret);
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}
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if start_time.elapsed().as_nanos() > timeout.as_nanos() {
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return Err(ETIMEDOUT);
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}
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}
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}
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