filesystem: De-globalize registered_cache_union

We can just return a new instance of this when it's requested. This only
ever holds pointers to the existing registed caches, so it's not a large
object. Plus, this also gets rid of the need to keep around a separate
member function just to properly clear out the union.

Gets rid of one of five globals in the filesystem code.

2 files changed, 4 insertions, 17 deletions

diff --git a/src/core/hle/service/filesystem/filesystem.cpp b/src/core/hle/service/filesystem/filesystem.cpp
index 2aa77f68d..dbef3b2e4 100644
--- a/src/core/hle/service/filesystem/filesystem.cpp
+++ b/src/core/hle/service/filesystem/filesystem.cpp
@@ -329,20 +329,9 @@ ResultVal<FileSys::VirtualDir> OpenSDMC() {
     return sdmc_factory->Open();
 }
 
-std::shared_ptr<FileSys::RegisteredCacheUnion> registered_cache_union;
-
-std::shared_ptr<FileSys::RegisteredCacheUnion> GetUnionContents() {
-    if (registered_cache_union == nullptr) {
-        registered_cache_union =
-            std::make_shared<FileSys::RegisteredCacheUnion>(std::vector<FileSys::RegisteredCache*>{
-                GetSystemNANDContents(), GetUserNANDContents(), GetSDMCContents()});
-    }
-
-    return registered_cache_union;
-}
-
-void ClearUnionContents() {
-    registered_cache_union = nullptr;
+FileSys::RegisteredCacheUnion GetUnionContents() {
+    return FileSys::RegisteredCacheUnion{
+        {GetSystemNANDContents(), GetUserNANDContents(), GetSDMCContents()}};
 }
 
 FileSys::RegisteredCache* GetSystemNANDContents() {
@@ -395,7 +384,6 @@ void CreateFactories(FileSys::VfsFilesystem& vfs, bool overwrite) {
         bis_factory = nullptr;
         save_data_factory = nullptr;
         sdmc_factory = nullptr;
-        ClearUnionContents();
     }
 
     auto nand_directory = vfs.OpenDirectory(FileUtil::GetUserPath(FileUtil::UserPath::NANDDir),
diff --git a/src/core/hle/service/filesystem/filesystem.h b/src/core/hle/service/filesystem/filesystem.h
index 0a6cb6635..93bf1b793 100644
--- a/src/core/hle/service/filesystem/filesystem.h
+++ b/src/core/hle/service/filesystem/filesystem.h
@@ -48,8 +48,7 @@ ResultVal<FileSys::VirtualDir> OpenSaveData(FileSys::SaveDataSpaceId space,
 ResultVal<FileSys::VirtualDir> OpenSaveDataSpace(FileSys::SaveDataSpaceId space);
 ResultVal<FileSys::VirtualDir> OpenSDMC();
 
-std::shared_ptr<FileSys::RegisteredCacheUnion> GetUnionContents();
-void ClearUnionContents();
+FileSys::RegisteredCacheUnion GetUnionContents();
 
 FileSys::RegisteredCache* GetSystemNANDContents();
 FileSys::RegisteredCache* GetUserNANDContents();