From 7a303d6e31d2a0f7d407b9641ea8f201d7a0d449 Mon Sep 17 00:00:00 2001
From: wish <wish@sek.ai>
Date: Sun, 14 Aug 2022 19:03:11 +1000
Subject: [PATCH] prevent use of reserved semaphore indexes

---
 server/channelserver/sys_channel_server.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/server/channelserver/sys_channel_server.go b/server/channelserver/sys_channel_server.go
index a23ec2834..ca9063baf 100644
--- a/server/channelserver/sys_channel_server.go
+++ b/server/channelserver/sys_channel_server.go
@@ -154,7 +154,7 @@ func NewServer(config *Config) *Server {
 		stages:          make(map[string]*Stage),
 		userBinaryParts: make(map[userBinaryPartID][]byte),
 		semaphore:       make(map[string]*Semaphore),
-		semaphoreIndex:  5,
+		semaphoreIndex:  7,
 		discordBot:      config.DiscordBot,
 		name:            config.Name,
 		enable:          config.Enable,
@@ -413,6 +413,9 @@ func (s *Server) NextSemaphoreID() uint32 {
 	for {
 		exists := false
 		s.semaphoreIndex = s.semaphoreIndex + 1
+		if s.semaphoreIndex == 0 {
+			s.semaphoreIndex = 7 // Skip reserved indexes
+		}
 		for _, semaphore := range s.semaphore {
 			if semaphore.id == s.semaphoreIndex {
 				exists = true