Index: intern/audaspace/intern/AUD_Reference.h
===================================================================
--- intern/audaspace/intern/AUD_Reference.h	(revisão 45981)
+++ intern/audaspace/intern/AUD_Reference.h	(cópia de trabalho)
@@ -32,6 +32,8 @@
 #include <map>
 #include <cstddef>
 
+#include <boost/thread/recursive_mutex.hpp>
+
 // #define MEM_DEBUG
 
 #ifdef MEM_DEBUG
@@ -51,6 +53,9 @@
 	static std::map<void*, unsigned int> m_references;
 
 public:
+
+	typedef boost::recursive_mutex mutex_type;
+
 	/**
 	 * Reference increment.
 	 * \param reference The reference.
@@ -88,6 +93,12 @@
 		}
 		return false;
 	}
+
+	static inline mutex_type &getMutex(void)
+	{
+		static mutex_type m;
+		return m;
+	}
 };
 
 template <class T>
@@ -108,6 +119,8 @@
 	template <class U>
 	AUD_Reference(U* reference)
 	{
+		AUD_ReferenceHandler::mutex_type::scoped_lock lock(AUD_ReferenceHandler::getMutex());
+	
 		m_original = reference;
 		m_reference = dynamic_cast<T*>(reference);
 		AUD_ReferenceHandler::incref(m_original);
@@ -129,6 +142,8 @@
 	 */
 	AUD_Reference(const AUD_Reference& ref)
 	{
+		AUD_ReferenceHandler::mutex_type::scoped_lock lock(AUD_ReferenceHandler::getMutex());
+	
 		m_original = ref.m_original;
 		m_reference = ref.m_reference;
 		AUD_ReferenceHandler::incref(m_original);
@@ -141,6 +156,8 @@
 	template <class U>
 	explicit AUD_Reference(const AUD_Reference<U>& ref)
 	{
+		AUD_ReferenceHandler::mutex_type::scoped_lock lock(AUD_ReferenceHandler::getMutex());
+	
 		m_original = ref.get();
 		m_reference = dynamic_cast<T*>(ref.get());
 		AUD_ReferenceHandler::incref(m_original);
@@ -156,6 +173,8 @@
 	 */
 	~AUD_Reference()
 	{
+		AUD_ReferenceHandler::mutex_type::scoped_lock lock(AUD_ReferenceHandler::getMutex());
+	
 #ifdef MEM_DEBUG
 		if(m_reference != NULL)
 			std::cerr << "-" << typeid(*m_reference).name() << std::endl;
@@ -170,6 +189,8 @@
 	 */
 	AUD_Reference& operator=(const AUD_Reference& ref)
 	{
+		AUD_ReferenceHandler::mutex_type::scoped_lock lock(AUD_ReferenceHandler::getMutex());
+	
 		if(&ref == this)
 			return *this;