22 lines
633 B
Rust
22 lines
633 B
Rust
use solana_sdk::pubkey::Pubkey;
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use std::{collections::HashSet, rc::Rc};
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#[derive(Default)]
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pub struct PubkeyReferences(HashSet<Rc<Pubkey>>);
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impl PubkeyReferences {
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pub fn get_or_insert(&mut self, pubkey: &Pubkey) -> Rc<Pubkey> {
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let mut cached_pubkey: Option<Rc<Pubkey>> = self.0.get(pubkey).cloned();
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if cached_pubkey.is_none() {
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let new_pubkey = Rc::new(*pubkey);
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self.0.insert(new_pubkey.clone());
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cached_pubkey = Some(new_pubkey);
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}
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cached_pubkey.unwrap()
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}
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pub fn purge(&mut self) {
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self.0.retain(|x| Rc::strong_count(x) > 1);
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}
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}
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