Index: ext/libicpf/src/mutex.cpp
===================================================================
diff -u -N -r28813ed68056ed023817951c1854bd73cc7d9e27 -r474d770b00b0605bd50dec176b614ac28a0cd053
--- ext/libicpf/src/mutex.cpp	(.../mutex.cpp)	(revision 28813ed68056ed023817951c1854bd73cc7d9e27)
+++ ext/libicpf/src/mutex.cpp	(.../mutex.cpp)	(revision 474d770b00b0605bd50dec176b614ac28a0cd053)
@@ -17,6 +17,21 @@
 #endif
 }
 
+mutex::mutex(const char_t* /*pszStr*/)
+{
+#ifdef _WIN32
+	::InitializeCriticalSection(&m_cs);
+#else
+	pthread_mutexattr_t mta;
+	pthread_mutexattr_init(&mta);
+//#warning Recursive mutexes are disabled; Make sure you use them the right way.
+	pthread_mutexattr_settype(&mta, PTHREAD_MUTEX_RECURSIVE_NP);
+	pthread_mutex_init(&m_mutex, &mta);
+
+	pthread_mutexattr_destroy(&mta);
+#endif
+}
+
 mutex::~mutex()
 {
 #ifdef _WIN32