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Support reference-counting state backend. (#5769)

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* Optimize pinning

* Ref counting state backend

* Style

Co-Authored-By: Wei Tang <hi@that.world>

* Update Cargo.lock

* Handle empty node

Co-authored-by: Wei Tang <hi@that.world>
This commit is contained in:
Arkadiy Paronyan
2020-04-27 12:24:50 +02:00
committed by GitHub
parent 636ddd95d2
commit 64ed36d093
11 changed files with 281 additions and 189 deletions
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substrate/primitives/trie/src/lib.rs
-6
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@@ -86,8 +86,6 @@ pub trait AsHashDB<H: Hasher>: hash_db::AsHashDB<H, trie_db::DBValue> {}
impl<H: Hasher, T: hash_db::AsHashDB<H, trie_db::DBValue>> AsHashDB<H> for T {}
/// Reexport from `hash_db`, with genericity set for `Hasher` trait.
pub type HashDB<'a, H> = dyn hash_db::HashDB<H, trie_db::DBValue> + 'a;
/// Reexport from `hash_db`, with genericity set for key only.
pub type PlainDB<'a, K> = dyn hash_db::PlainDB<K, trie_db::DBValue> + 'a;
/// Reexport from `hash_db`, with genericity set for `Hasher` trait.
/// This uses a `KeyFunction` for prefixing keys internally (avoiding
/// key conflict for non random keys).
@@ -244,7 +242,6 @@ pub fn child_delta_trie_root<L: TrieConfiguration, I, A, B, DB, RD>(
B: AsRef<[u8]>,
RD: AsRef<[u8]>,
DB: hash_db::HashDB<L::Hash, trie_db::DBValue>
+ hash_db::PlainDB<TrieHash<L>, trie_db::DBValue>,
{
let mut root = TrieHash::<L>::default();
// root is fetched from DB, not writable by runtime, so it's always valid.
@@ -274,7 +271,6 @@ pub fn for_keys_in_child_trie<L: TrieConfiguration, F: FnMut(&[u8]), DB>(
) -> Result<(), Box<TrieError<L>>>
where
DB: hash_db::HashDBRef<L::Hash, trie_db::DBValue>
+ hash_db::PlainDBRef<TrieHash<L>, trie_db::DBValue>,
{
let mut root = TrieHash::<L>::default();
// root is fetched from DB, not writable by runtime, so it's always valid.
@@ -324,7 +320,6 @@ pub fn read_child_trie_value<L: TrieConfiguration, DB>(
) -> Result<Option<Vec<u8>>, Box<TrieError<L>>>
where
DB: hash_db::HashDBRef<L::Hash, trie_db::DBValue>
+ hash_db::PlainDBRef<TrieHash<L>, trie_db::DBValue>,
{
let mut root = TrieHash::<L>::default();
// root is fetched from DB, not writable by runtime, so it's always valid.
@@ -344,7 +339,6 @@ pub fn read_child_trie_value_with<L: TrieConfiguration, Q: Query<L::Hash, Item=D
) -> Result<Option<Vec<u8>>, Box<TrieError<L>>>
where
DB: hash_db::HashDBRef<L::Hash, trie_db::DBValue>
+ hash_db::PlainDBRef<TrieHash<L>, trie_db::DBValue>,
{
let mut root = TrieHash::<L>::default();
// root is fetched from DB, not writable by runtime, so it's always valid.