Prevent cached resource from being acquired while it is being destroyed

Fixes #158

1 files changed, 5 insertions, 2 deletions

diff --git a/libultraship/libultraship/ResourceMgr.cpp b/libultraship/libultraship/ResourceMgr.cpp
index e6f3c8a0a..b4d7b76a8 100644
--- a/libultraship/libultraship/ResourceMgr.cpp
+++ b/libultraship/libultraship/ResourceMgr.cpp
@@ -217,9 +217,12 @@ namespace Ship {
 
 	std::shared_ptr<Ship::Resource> ResourceMgr::GetCachedFile(std::string FilePath) {
 		auto resCacheFind = ResourceCache.find(FilePath);
-		
-		if (resCacheFind != ResourceCache.end())
+
+		if (resCacheFind != ResourceCache.end() &&
+			resCacheFind->second.use_count() > 0)
+		{
 			return resCacheFind->second;
+		}
 		else
 			return nullptr;
 	}