From 803dd4f2eb192e268a0fa486f1b83ed269c7e86a Mon Sep 17 00:00:00 2001
From: kercylan98 <kercylan@gmail.com>
Date: Sat, 21 Oct 2023 18:19:51 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20lockstep=20=E6=94=AF=E6=8C=81=E4=B8=A2?=
 =?UTF-8?q?=E5=BC=83=E5=B8=A7=E7=BC=93=E5=AD=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 server/lockstep/lockstep.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/server/lockstep/lockstep.go b/server/lockstep/lockstep.go
index d455498..c9b3d55 100644
--- a/server/lockstep/lockstep.go
+++ b/server/lockstep/lockstep.go
@@ -88,6 +88,17 @@ func (slf *Lockstep[ClientID, Command]) JoinClientWithFrame(client Client[Client
 
 }
 
+// DropCache 丢弃特定帧的缓存，当 handler 返回 true 时将丢弃缓存
+func (slf *Lockstep[ClientID, Command]) DropCache(handler func(frame int64) bool) {
+	slf.frameCacheLock.Lock()
+	defer slf.frameCacheLock.Unlock()
+	for frame, _ := range slf.frameCache {
+		if handler(frame) {
+			delete(slf.frameCache, frame)
+		}
+	}
+}
+
 // LeaveClient 将客户端从广播队列中移除
 func (slf *Lockstep[ClientID, Command]) LeaveClient(clientId ClientID) {
 	slf.clientLock.Lock()