Buffer manager trait

src/innodb/buffer_manager/heap_buffer_manager.rs

@@ -0,0 +1,13 @@
+use super::BufferManager;
+
+pub struct HeapBufferManager {}
+
+impl BufferManager for HeapBufferManager {
+    fn open_page<'a>(&'a mut self, space_id: u64, offset: u64) -> crate::innodb::page::Page<'a> {
+        todo!()
+    }
+
+    fn close_page(&mut self, page: &crate::innodb::page::Page) {
+        todo!()
+    }
+}

src/innodb/buffer_manager/mod.rs

@@ -0,0 +1,8 @@
+use super::page::Page;
+
+pub mod heap_buffer_manager;
+
+pub trait BufferManager {
+    fn open_page<'a>(&'a mut self, space_id: u64, offset: u64) -> Page<'a>;
+    fn close_page(&mut self, page: &Page);
+}

src/innodb/mod.rs

@@ -1,4 +1,5 @@
 pub mod charset;
+pub mod buffer_manager;
 pub mod page;
 pub mod table;
 

src/innodb/page/mod.rs

@@ -43,6 +43,7 @@ fn fold_bytes(buf: &[u8]) -> u32 {
 
 #[derive(Default, Clone, PartialEq)]
 pub struct Page<'a> {
+    pub space_id: Option<u64>,
     pub header: FILHeader,
     pub trailer: FILTrailer,
     pub raw_data: &'a [u8],
@@ -64,6 +65,7 @@ impl<'a> Page<'a> {
         }
 
         Ok(Page {
+            space_id: None,
             header: FILHeader::from_bytes(&buf[0..38])?,
             trailer: FILTrailer::from_bytes(&buf[(FIL_PAGE_SIZE - FIL_TRAILER_SIZE)..])?,
             raw_data: buf,