From 7f3343169a2ce923cd3d13329e30b804b0fd91aa Mon Sep 17 00:00:00 2001
From: wwqgtxx <wwqgtxx@gmail.com>
Date: Wed, 12 Mar 2025 15:58:38 +0800
Subject: [PATCH] Better atomic using

---
 monitor_android.go       | 3 +--
 monitor_darwin.go        | 3 +--
 monitor_linux_default.go | 3 +--
 monitor_windows.go       | 3 +--
 4 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/monitor_android.go b/monitor_android.go
index 2734c85..1c7e711 100644
--- a/monitor_android.go
+++ b/monitor_android.go
@@ -51,12 +51,11 @@ func (m *defaultInterfaceMonitor) checkUpdate() error {
 		return err
 	}
 
-	oldInterface := m.defaultInterface.Load()
 	newInterface, err := m.interfaceFinder.ByIndex(link.Attrs().Index)
 	if err != nil {
 		return E.Cause(err, "find updated interface: ", link.Attrs().Name)
 	}
-	m.defaultInterface.Store(newInterface)
+	oldInterface := m.defaultInterface.Swap(newInterface)
 	if oldInterface != nil && oldInterface.Equals(*newInterface) && oldVPNEnabled == m.androidVPNEnabled {
 		return nil
 	}
diff --git a/monitor_darwin.go b/monitor_darwin.go
index 88ea90c..f937c37 100644
--- a/monitor_darwin.go
+++ b/monitor_darwin.go
@@ -165,12 +165,11 @@ func (m *defaultInterfaceMonitor) checkUpdate() error {
 	if defaultInterface == nil {
 		return ErrNoRoute
 	}
-	oldInterface := m.defaultInterface.Load()
 	newInterface, err := m.interfaceFinder.ByIndex(defaultInterface.Index)
 	if err != nil {
 		return E.Cause(err, "find updated interface: ", defaultInterface.Name)
 	}
-	m.defaultInterface.Store(newInterface)
+	oldInterface := m.defaultInterface.Swap(newInterface)
 	if oldInterface != nil && oldInterface.Equals(*newInterface) {
 		return nil
 	}
diff --git a/monitor_linux_default.go b/monitor_linux_default.go
index e9cce1d..72ba1be 100644
--- a/monitor_linux_default.go
+++ b/monitor_linux_default.go
@@ -25,12 +25,11 @@ func (m *defaultInterfaceMonitor) checkUpdate() error {
 			return err
 		}
 
-		oldInterface := m.defaultInterface.Load()
 		newInterface, err := m.interfaceFinder.ByIndex(link.Attrs().Index)
 		if err != nil {
 			return E.Cause(err, "find updated interface: ", link.Attrs().Name)
 		}
-		m.defaultInterface.Store(newInterface)
+		oldInterface := m.defaultInterface.Swap(newInterface)
 		if oldInterface != nil && oldInterface.Equals(*newInterface) {
 			return nil
 		}
diff --git a/monitor_windows.go b/monitor_windows.go
index 179f074..18a795f 100644
--- a/monitor_windows.go
+++ b/monitor_windows.go
@@ -102,12 +102,11 @@ func (m *defaultInterfaceMonitor) checkUpdate() error {
 		return ErrNoRoute
 	}
 
-	oldInterface := m.defaultInterface.Load()
 	newInterface, err := m.interfaceFinder.ByIndex(index)
 	if err != nil {
 		return E.Cause(err, "find updated interface: ", alias)
 	}
-	m.defaultInterface.Store(newInterface)
+	oldInterface := m.defaultInterface.Swap(newInterface)
 	if oldInterface != nil && oldInterface.Equals(*newInterface) {
 		return nil
 	}