Some file server related things

file/local_server/LocalFileTransferDisk.cpp

@@ -140,6 +140,22 @@ void FileClient::flush_disk_buffer() {
     }
 }
 
+bool FileClient::buffers_flushed() {
+    {
+        std::lock_guard db_lock{this->disk_buffer.mutex};
+        if(this->disk_buffer.bytes > 0)
+            return false;
+    }
+
+    {
+        std::lock_guard nb_lock{this->network_buffer.mutex};
+        if(this->network_buffer.bytes > 0)
+            return false;
+    }
+
+    return true;
+}
+
 FileInitializeResult LocalFileTransfer::initialize_file_io(const std::shared_ptr<FileClient> &transfer) {
     FileInitializeResult result{FileInitializeResult::SUCCESS};
     assert(transfer->transfer);