fs_user: Add a delay for each file open

src/core/hle/service/fs/archive.h

@@ -234,6 +234,8 @@ public:
     /// Registers a new NCCH file with the SelfNCCH archive factory
     void RegisterSelfNCCH(Loader::AppLoader& app_loader);
 
+    ArchiveBackend* GetArchive(ArchiveHandle handle);
+
 private:
     Core::System& system;
 
@@ -248,8 +250,6 @@ private:
     /// Register all archive types
     void RegisterArchiveTypes();
 
-    ArchiveBackend* GetArchive(ArchiveHandle handle);
-
     /**
      * Map of registered archives, identified by id code. Once an archive is registered here, it is
      * never removed until UnregisterArchiveTypes is called.

src/core/hle/service/fs/fs_user.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
+#include "core/hle/kernel/event.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/server_session.h"
 #include "core/hle/result.h"
@@ -70,6 +71,18 @@ void FS_USER::OpenFile(Kernel::HLERequestContext& ctx) {
         rb.PushMoveObjects<Kernel::Object>(nullptr);
         LOG_ERROR(Service_FS, "failed to get a handle for file {}", file_path.DebugStr());
     }
+
+    auto archive = archives.GetArchive(archive_handle);
+    if (archive == nullptr)
+        return;
+
+    std::chrono::nanoseconds open_timeout_ns{archive->GetOpenDelayNs()};
+    ctx.SleepClientThread(system.Kernel().GetThreadManager().GetCurrentThread(), "fs_user::open",
+                          open_timeout_ns,
+                          [](Kernel::SharedPtr<Kernel::Thread> thread,
+                             Kernel::HLERequestContext& ctx, Kernel::ThreadWakeupReason reason) {
+                              // Nothing to do here
+                          });
 }
 
 void FS_USER::OpenFileDirectly(Kernel::HLERequestContext& ctx) {