wayland: implement tablet-v2

src/utils/bindings.rs

@@ -5,7 +5,11 @@ use {
         utils::copyhashmap::{CopyHashMap, Locked},
     },
     ahash::AHashMap,
-    std::{cell::RefCell, collections::hash_map::Entry, rc::Rc},
+    std::{
+        cell::{Ref, RefCell},
+        collections::hash_map::Entry,
+        rc::Rc,
+    },
 };
 
 pub struct Bindings<P> {
@@ -84,4 +88,8 @@ impl<P: Object> PerClientBindings<P> {
             }
         }
     }
+
+    pub fn borrow(&self) -> Ref<AHashMap<ClientId, AHashMap<ObjectId, Rc<P>>>> {
+        self.bindings.borrow()
+    }
 }

src/utils/copyhashmap.rs

@@ -66,7 +66,7 @@ impl<K: Eq + Hash, V> CopyHashMap<K, V> {
         unsafe { self.map.get().deref().contains_key(k) }
     }
 
-    pub fn lock(&self) -> Locked<K, V> {
+    pub fn lock(&self) -> Locked<'_, K, V> {
         Locked {
             source: self,
             map: self.clear(),

src/utils/pending_serial.rs

@@ -0,0 +1,19 @@
+use crate::client::Client;
+
+pub struct PendingSerial<'a> {
+    serial: Option<u32>,
+    client: &'a Client,
+}
+
+impl<'a> PendingSerial<'a> {
+    pub fn new(client: &'a Client) -> Self {
+        Self {
+            serial: None,
+            client,
+        }
+    }
+
+    pub fn get(&mut self) -> u32 {
+        *self.serial.get_or_insert_with(|| self.client.next_serial())
+    }
+}