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page_cache: split unlink() out of detach()

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The unlink function removes an entry from the LRU.

The detach function removes an entry in the cache and clears page
contents.
This commit is contained in:
Alecco 2025-04-15 12:44:34 +02:00 • committed by Pere Diaz Bou
parent 6763aa0cd5
commit c8beddab09
1 changed files with 4 additions and 2 deletions
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6
core/storage/page_cache.rs
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@ -109,7 +109,7 @@ impl DumbLruPageCache {
let mut ptr = self.get_ptr(key)?;
let page = unsafe { ptr.as_mut().page.clone() };
if touch {
self.detach(ptr, false);
self.unlink(ptr);
self.touch(ptr);
}
Some(page)
@ -128,7 +128,10 @@ impl DumbLruPageCache {
debug!("cleaning up page {}", page.get().id);
let _ = page.get().contents.take();
}
self.unlink(entry);
}
fn unlink(&mut self, mut entry: NonNull<PageCacheEntry>) {
let (next, prev) = unsafe {
let c = entry.as_mut();
let next = c.next;
@ -138,7 +141,6 @@ impl DumbLruPageCache {
(next, prev)
};
// detach
match (prev, next) {
(None, None) => {
self.head.replace(None);