From 53a7d6512f2d60f426b421225d98779f0228bf36 Mon Sep 17 00:00:00 2001
From: water111 <48171810+water111@users.noreply.github.com>
Date: Wed, 12 May 2021 22:44:58 -0400
Subject: [PATCH] lock when modifying components (#475)

---
 game/system/vm/vm.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/game/system/vm/vm.cpp b/game/system/vm/vm.cpp
index a252534779..5dfd96df23 100644
--- a/game/system/vm/vm.cpp
+++ b/game/system/vm/vm.cpp
@@ -82,7 +82,9 @@ void subscribe_component() {
     throw std::runtime_error("[VM] Cannot add new components when VM is dead!");
   }
 
+  status_mutex.lock();
   ++components;
+  status_mutex.unlock();
 
   // stall component until VM is ready
   if (status == Status::Uninited) {
@@ -91,7 +93,9 @@ void subscribe_component() {
 }
 
 void unsubscribe_component() {
+  status_mutex.lock();
   --components;
+  status_mutex.unlock();
   vm_dead_cv.notify_all();
 }