diff --git a/SiaDrive.Dokan.Api/SiaDokenDrive.cpp b/SiaDrive.Dokan.Api/SiaDokenDrive.cpp
index 3e0b18e..1c782fd 100644
--- a/SiaDrive.Dokan.Api/SiaDokenDrive.cpp
+++ b/SiaDrive.Dokan.Api/SiaDokenDrive.cpp
@@ -1,48 +1,107 @@
 #include "stdafx.h"
 #include "SiaDokenDrive.h"
 #include <dokan\dokan.h>
-#include <dokan\fileinfo.h>
 
 using namespace Sia::Api;
 using namespace Sia::Api::Dokan;
 
-
-static bool s_dokenInitialized = false;
-static CSiaDokenDrive* s_dokenDrive = nullptr;
-static DOKAN_OPERATIONS s_dokanOps = {0};
-
-
-static NTSTATUS DOKAN_CALLBACK SiaDrive_ZwCreateFile(
-	LPCWSTR FileName, 
-	PDOKAN_IO_SECURITY_CONTEXT SecurityContext,
-	ACCESS_MASK DesiredAccess, 
-	ULONG FileAttributes,
-	ULONG ShareAccess, 
-	ULONG CreateDisposition,
-	ULONG CreateOptions, 
-	PDOKAN_FILE_INFO DokanFileInfo) 
+class DokanImpl
 {
-}
+private:
+	static std::mutex _dokanMutex;
+	static CSiaApi* _siaApi;
+	static DOKAN_OPERATIONS _dokanOps;
 
+private:
+	static NTSTATUS DOKAN_CALLBACK SiaDrive_ZwCreateFile(
+		LPCWSTR FileName,
+		PDOKAN_IO_SECURITY_CONTEXT SecurityContext,
+		ACCESS_MASK DesiredAccess,
+		ULONG FileAttributes,
+		ULONG ShareAccess,
+		ULONG CreateDisposition,
+		ULONG CreateOptions,
+		PDOKAN_FILE_INFO DokanFileInfo)
+	{
+	}
+
+	static NTSTATUS DOKAN_CALLBACK SiaDrive_FindFiles(
+		LPCWSTR FileName,
+		PFillFindData FillFindData,
+		PDOKAN_FILE_INFO DokanFileInfo)
+	{
+	}
+
+public:
+	static void Initialize(CSiaApi* siaApi)
+	{
+		_siaApi = siaApi;
+		_dokanOps.Cleanup = nullptr;
+		_dokanOps.CloseFile = nullptr;
+		_dokanOps.DeleteDirectory = nullptr;
+		_dokanOps.DeleteFileW = nullptr;
+		_dokanOps.FindFiles = SiaDrive_FindFiles;
+		_dokanOps.FindFilesWithPattern = nullptr;
+		_dokanOps.FindStreams = nullptr;
+		_dokanOps.FlushFileBuffers = nullptr;
+		_dokanOps.GetDiskFreeSpaceW = nullptr;
+		_dokanOps.GetFileInformation = nullptr;
+		_dokanOps.GetFileSecurityW = nullptr;
+		_dokanOps.GetVolumeInformationW = nullptr;
+		_dokanOps.LockFile = nullptr;
+		_dokanOps.Mounted = nullptr;
+		_dokanOps.MoveFileW = nullptr;
+		_dokanOps.ReadFile = nullptr;
+		_dokanOps.SetAllocationSize = nullptr;
+		_dokanOps.SetEndOfFile = nullptr;
+		_dokanOps.SetFileAttributesW = nullptr;
+		_dokanOps.SetFileSecurityW = nullptr;
+		_dokanOps.SetFileTime = nullptr;
+		_dokanOps.UnlockFile = nullptr;
+		_dokanOps.Unmounted = nullptr;
+		_dokanOps.WriteFile = nullptr;
+		_dokanOps.ZwCreateFile = SiaDrive_ZwCreateFile;
+	}
+
+	static void Shutdown()
+	{
+		_siaApi = nullptr;
+		ZeroMemory(&_dokanOps, sizeof(_dokanOps));
+	}
+
+	static std::mutex& GetMutex()
+	{
+		return _dokanMutex;
+	}
+
+	static bool IsInitialized()
+	{
+		return _siaApi != nullptr;
+	}
+};
+std::mutex DokanImpl::_dokanMutex;
+CSiaApi* DokanImpl::_siaApi = nullptr;
+DOKAN_OPERATIONS DokanImpl::_dokanOps = { 0 };
 
 CSiaDokenDrive::CSiaDokenDrive(CSiaApi& siaApi) :
 	_siaApi(siaApi)
 {
-	if (s_dokenDrive)
+	std::lock_guard<std::mutex> l(DokanImpl::GetMutex());
+	if (DokanImpl::IsInitialized())
 	{
 		throw SiaDokenDriveException("Sia drive has already been activated");
 	}
 	else
 	{
-		s_dokenDrive = this;
-		s_dokanOps.ZwCreateFile = SiaDrive_ZwCreateFile;
+		DokanImpl::Initialize(&_siaApi);
 	}
 }
 
 CSiaDokenDrive::~CSiaDokenDrive()
 {
+	std::lock_guard<std::mutex> l(DokanImpl::GetMutex());
 	Unmount();
-	s_dokenDrive = nullptr;
+	DokanImpl::Shutdown();
 }
 
 void CSiaDokenDrive::Mount(const wchar_t& driveLetter)
diff --git a/SiaDrive.Dokan.Api/SiaDokenDrive.h b/SiaDrive.Dokan.Api/SiaDokenDrive.h
index 8f7cd4b..26e85c4 100644
--- a/SiaDrive.Dokan.Api/SiaDokenDrive.h
+++ b/SiaDrive.Dokan.Api/SiaDokenDrive.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <SiaApi.h>
+#include <mutex>
 
 NS_BEGIN(Sia)
 NS_BEGIN(Api)