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Fix overflowing subtraction (#2164)

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Dániel Buga 2024-09-16 12:47:16 +02:00 committed by GitHub
parent b5dd5aed17
commit dfb40c0416
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2 changed files with 8 additions and 3 deletions
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1
esp-wifi/CHANGELOG.md
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@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Fixed
- Feature `wifi-logs` doesn't break the build anymore (#2117)
- Fixed a panic when overflow-checks are enabled (#2164)
### Removed

10
esp-wifi/src/compat/common.rs
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@ -63,7 +63,7 @@ impl RawQueue {
}
fn enqueue(&mut self, item: *mut c_void) -> i32 {
if (self.current_write - self.current_read) % self.count < self.count {
if self.count() < self.count {
unsafe {
let p = self.storage.byte_add(self.item_size * self.current_write);
p.copy_from(item as *mut u8, self.item_size);
@ -77,7 +77,7 @@ impl RawQueue {
}
fn try_dequeue(&mut self, item: *mut c_void) -> bool {
if (self.current_write - self.current_read) % self.count > 0 {
if self.count() > 0 {
unsafe {
let p = self.storage.byte_add(self.item_size * self.current_read) as *const c_void;
item.copy_from(p, self.item_size);
@ -90,7 +90,11 @@ impl RawQueue {
}
fn count(&self) -> usize {
(self.current_write - self.current_read) % self.count
if self.current_write >= self.current_read {
self.current_write - self.current_read
} else {
self.count - self.current_read + self.current_write
}
}
}