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feat: finished zero-copy migration!

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now the entire networking and persistence stack is zero-copy with
single-allocation, single-copy reads.

Closes #128

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>
This commit is contained in:
Sienna Meridian Satterwhite
2025-12-17 21:45:46 +00:00
parent bb4393bb9e
commit 9c19fc0296
14 changed files with 106 additions and 81 deletions
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18
crates/libmarathon/src/persistence/database.rs
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@@ -485,7 +485,7 @@ pub fn save_session(conn: &mut Connection, session: &crate::networking::Session)
session.last_active,
session.entity_count as i64,
session.state.to_string(),
session.secret,
session.secret.as_ref().map(|b| b.as_ref()),
],
)?;
Ok(())
@@ -517,7 +517,8 @@ pub fn load_session(
last_active: row.get(3)?,
entity_count: row.get::<_, i64>(4)? as usize,
state,
secret: row.get(6)?,
secret: row.get::<_, Option<std::borrow::Cow<'_, [u8]>>>(6)?
.map(|cow| bytes::Bytes::copy_from_slice(&cow)),
})
},
)
@@ -548,7 +549,8 @@ pub fn get_last_active_session(conn: &Connection) -> Result<Option<crate::networ
last_active: row.get(3)?,
entity_count: row.get::<_, i64>(4)? as usize,
state,
secret: row.get(6)?,
secret: row.get::<_, Option<std::borrow::Cow<'_, [u8]>>>(6)?
.map(|cow| bytes::Bytes::copy_from_slice(&cow)),
})
},
)
@@ -643,10 +645,10 @@ pub fn load_entity_components(
let components: Vec<LoadedComponent> = stmt
.query_map([entity_id.as_bytes()], |row| {
let data_vec: Vec<u8> = row.get(1)?;
let data_cow: std::borrow::Cow<'_, [u8]> = row.get(1)?;
Ok(LoadedComponent {
component_type: row.get(0)?,
data: bytes::Bytes::from(data_vec),
data: bytes::Bytes::copy_from_slice(&data_cow),
})
})?
.collect::<std::result::Result<Vec<_>, _>>()?;
@@ -669,7 +671,7 @@ pub fn load_entity_by_network_id(
WHERE id = ?1",
[network_id.as_bytes()],
|row| {
let id_bytes: Vec<u8> = row.get(0)?;
let id_bytes: std::borrow::Cow<'_, [u8]> = row.get(0)?;
let mut id_array = [0u8; 16];
id_array.copy_from_slice(&id_bytes);
let id = uuid::Uuid::from_bytes(id_array);
@@ -714,7 +716,7 @@ pub fn load_all_entities(conn: &Connection) -> Result<Vec<LoadedEntity>> {
)?;
let entity_rows = stmt.query_map([], |row| {
let id_bytes: Vec<u8> = row.get(0)?;
let id_bytes: std::borrow::Cow<'_, [u8]> = row.get(0)?;
let mut id_array = [0u8; 16];
id_array.copy_from_slice(&id_bytes);
let id = uuid::Uuid::from_bytes(id_array);
@@ -761,7 +763,7 @@ pub fn load_entities_by_type(conn: &Connection, entity_type: &str) -> Result<Vec
)?;
let entity_rows = stmt.query_map([entity_type], |row| {
let id_bytes: Vec<u8> = row.get(0)?;
let id_bytes: std::borrow::Cow<'_, [u8]> = row.get(0)?;
let mut id_array = [0u8; 16];
id_array.copy_from_slice(&id_bytes);
let id = uuid::Uuid::from_bytes(id_array);