From 7f6fe93f552ec34e260e37d404007848723823c7 Mon Sep 17 00:00:00 2001 From: Ulf Lilleengen <lulf@redhat.com> Date: Thu, 12 Oct 2023 20:54:26 +0200 Subject: [PATCH] fix: remove unused ringbuffer code --- embassy-hal-internal/src/lib.rs | 1 - embassy-hal-internal/src/ring_buffer.rs | 136 ------------------------ 2 files changed, 137 deletions(-) delete mode 100644 embassy-hal-internal/src/ring_buffer.rs diff --git a/embassy-hal-internal/src/lib.rs b/embassy-hal-internal/src/lib.rs index 3640ea184..f3d59e588 100644 --- a/embassy-hal-internal/src/lib.rs +++ b/embassy-hal-internal/src/lib.rs @@ -10,7 +10,6 @@ pub mod drop; mod macros; mod peripheral; pub mod ratio; -pub mod ring_buffer; pub use peripheral::{Peripheral, PeripheralRef}; #[cfg(feature = "cortex-m")] diff --git a/embassy-hal-internal/src/ring_buffer.rs b/embassy-hal-internal/src/ring_buffer.rs deleted file mode 100644 index fcad68bb1..000000000 --- a/embassy-hal-internal/src/ring_buffer.rs +++ /dev/null @@ -1,136 +0,0 @@ -pub struct RingBuffer<'a> { - buf: &'a mut [u8], - start: usize, - end: usize, - empty: bool, -} - -impl<'a> RingBuffer<'a> { - pub fn new(buf: &'a mut [u8]) -> Self { - Self { - buf, - start: 0, - end: 0, - empty: true, - } - } - - pub fn push_buf(&mut self) -> &mut [u8] { - if self.start == self.end && !self.empty { - trace!(" ringbuf: push_buf empty"); - return &mut self.buf[..0]; - } - - let n = if self.start <= self.end { - self.buf.len() - self.end - } else { - self.start - self.end - }; - - trace!(" ringbuf: push_buf {:?}..{:?}", self.end, self.end + n); - &mut self.buf[self.end..self.end + n] - } - - pub fn push(&mut self, n: usize) { - trace!(" ringbuf: push {:?}", n); - if n == 0 { - return; - } - - self.end = self.wrap(self.end + n); - self.empty = false; - } - - pub fn pop_buf(&mut self) -> &mut [u8] { - if self.empty { - trace!(" ringbuf: pop_buf empty"); - return &mut self.buf[..0]; - } - - let n = if self.end <= self.start { - self.buf.len() - self.start - } else { - self.end - self.start - }; - - trace!(" ringbuf: pop_buf {:?}..{:?}", self.start, self.start + n); - &mut self.buf[self.start..self.start + n] - } - - pub fn pop(&mut self, n: usize) { - trace!(" ringbuf: pop {:?}", n); - if n == 0 { - return; - } - - self.start = self.wrap(self.start + n); - self.empty = self.start == self.end; - } - - pub fn is_full(&self) -> bool { - self.start == self.end && !self.empty - } - - pub fn is_empty(&self) -> bool { - self.empty - } - - pub fn clear(&mut self) { - self.start = 0; - self.end = 0; - self.empty = true; - } - - fn wrap(&self, n: usize) -> usize { - assert!(n <= self.buf.len()); - if n == self.buf.len() { - 0 - } else { - n - } - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn push_pop() { - let mut b = [0; 4]; - let mut rb = RingBuffer::new(&mut b); - let buf = rb.push_buf(); - assert_eq!(4, buf.len()); - buf[0] = 1; - buf[1] = 2; - buf[2] = 3; - buf[3] = 4; - rb.push(4); - - let buf = rb.pop_buf(); - assert_eq!(4, buf.len()); - assert_eq!(1, buf[0]); - rb.pop(1); - - let buf = rb.pop_buf(); - assert_eq!(3, buf.len()); - assert_eq!(2, buf[0]); - rb.pop(1); - - let buf = rb.pop_buf(); - assert_eq!(2, buf.len()); - assert_eq!(3, buf[0]); - rb.pop(1); - - let buf = rb.pop_buf(); - assert_eq!(1, buf.len()); - assert_eq!(4, buf[0]); - rb.pop(1); - - let buf = rb.pop_buf(); - assert_eq!(0, buf.len()); - - let buf = rb.push_buf(); - assert_eq!(4, buf.len()); - } -}