do memory card write test in a separate thread

stepmania/src/arch/MemoryCard/MemoryCardDriverThreaded.cpp

@@ -0,0 +1,91 @@
+#include "global.h"
+#include "MemoryCardDriverThreaded.h"
+#include "RageLog.h"
+#include "RageUtil.h"
+#include "RageFileManager.h"
+
+
+int MemoryCardDriverThreaded::MountThread_Start( void *p )
+{
+	((MemoryCardDriverThreaded*)p)->MountThreadMain();
+	return 0;
+}
+
+template<class T>
+bool VectorsAreEqual( const T &a, const T &b )
+{
+	if( a.size() != b.size() )
+		return false;
+	
+	for( unsigned i=0; i<a.size(); i++ )
+    {
+		if( a[i] != b[i] )
+			return false;
+    }
+	
+	return true;
+}
+
+MemoryCardDriverThreaded::MemoryCardDriverThreaded() :
+m_mutexStorageDevices("StorageDevices")
+{
+	m_bShutdown = false;
+}
+
+void MemoryCardDriverThreaded::StartThread()
+{
+	m_threadMemoryCardMount.SetName("MemoryCardMount");
+	m_threadMemoryCardMount.Create( MountThread_Start, this );
+}
+
+MemoryCardDriverThreaded::~MemoryCardDriverThreaded()
+{
+	m_bShutdown = true;
+	LOG->Trace( "Shutting down Mount thread..." );
+	m_threadMemoryCardMount.Wait();
+	LOG->Trace( "Mount thread shut down." );
+}
+
+bool MemoryCardDriverThreaded::StorageDevicesChanged()
+{
+	LockMut( m_mutexStorageDevices );
+	if( m_bStorageDevicesChanged )
+    {
+		m_bStorageDevicesChanged = false;
+		return true;
+    }
+	else
+    {
+		return false;
+    }
+}
+
+void MemoryCardDriverThreaded::GetStorageDevices( vector<UsbStorageDevice>& vDevicesOut )
+{
+	LockMut( m_mutexStorageDevices );
+	vDevicesOut.clear();
+	for( unsigned i=0; i<m_vStorageDevices.size(); i++ )
+		vDevicesOut.push_back( m_vStorageDevices[i] );
+}
+
+bool MemoryCardDriverThreaded::MountAndTestWrite( UsbStorageDevice* pDevice, CString sMountPoint )
+{
+	LockMut( m_mutexStorageDevices );
+	vector<UsbStorageDeviceEx>::const_iterator iter = find( m_vStorageDevices.begin(), m_vStorageDevices.end(), *pDevice );
+	if( iter == m_vStorageDevices.end() )
+	{
+		LOG->Warn( "Tried to mount a memory card that is no longer connected" );
+		return false;
+	}
+
+	if( !iter->bWriteTestSucceeded )
+		return false;
+
+	this->Mount( pDevice, sMountPoint );
+	return true;
+}
+
+/*
+* Copyright (c) 2003 by the person(s) listed below.  All rights reserved.
+*	Chris Danford
+*/