From c0ce374f0fefebec5f7526218bf4743590a63eec Mon Sep 17 00:00:00 2001
From: Braden Walker <bradenawalker@gmail.com>
Date: Sun, 10 Sep 2023 22:35:23 -0400
Subject: [PATCH] add (xsync.Map).{CompareAndSwap,CompareAndDelete,Swap}

---
 xsync/xsync.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/xsync/xsync.go b/xsync/xsync.go
index ae83783..445862a 100644
--- a/xsync/xsync.go
+++ b/xsync/xsync.go
@@ -230,6 +230,12 @@ type Map[K comparable, V any] struct {
 	m sync.Map
 }
 
+func (m *Map[K, V]) CompareAndDelete(key K, old V) (deleted bool) {
+	return m.m.CompareAndDelete(key, old)
+}
+func (m *Map[K, V]) CompareAndSwap(key K, old V, new V) (deleted bool) {
+	return m.m.CompareAndSwap(key, old, new)
+}
 func (m *Map[K, V]) Delete(key K) {
 	m.m.Delete(key)
 }
@@ -261,6 +267,10 @@ func (m *Map[K, V]) Range(f func(key K, value V) bool) {
 func (m *Map[K, V]) Store(key K, value V) {
 	m.m.Store(key, value)
 }
+func (m *Map[K, V]) Swap(key K, value V) (previous V, loaded bool) {
+	previousUntyped, loaded := m.m.Swap(key, value)
+	return previousUntyped.(V), loaded
+}
 
 // Pool is a typesafe wrapper over sync.Pool.
 type Pool[T any] struct {