introduce swap_strategy

Author: MarinPostma

libsql-wal/src/lib.rs

@@ -10,6 +10,7 @@ pub mod shared_wal;
 pub mod storage;
 pub mod transaction;
 pub mod wal;
+mod swap_strategy;
 
 const LIBSQL_MAGIC: u64 = u64::from_be_bytes(*b"LIBSQL\0\0");
 const LIBSQL_PAGE_SIZE: u16 = 4096;

libsql-wal/src/swap_strategy/mod.rs

@@ -0,0 +1,7 @@
+pub(crate) mod duration;
+pub(crate) mod frame_count;
+
+pub(crate) trait SwapStrategy: Sync + Send + 'static {
+    fn should_swap(&self, frames_in_wal: usize) -> bool;
+    fn swapped(&self);
+}