Ed25519 per thread

Signature.cpp

@@ -395,12 +395,26 @@ namespace crypto
 			// Bi16[0][0] = B, base point
 	};
 
-	static std::unique_ptr<Ed25519> g_Ed25519;
-	std::unique_ptr<Ed25519>& GetEd25519 ()
+	static std::shared_ptr<Ed25519> g_Ed25519;
+#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 8)) // gcc 4.8 and higer
+	static thread_local std::shared_ptr<Ed25519> g_Ed25519ThisThread; 
+#else
+	static std::shared_ptr<Ed25519> g_Ed25519ThisThread;
+#endif
+	std::shared_ptr<Ed25519>& GetEd25519 ()
+	{
+		// TODO: implement it better	
+		if (!g_Ed25519ThisThread)
 		{
 			if (!g_Ed25519)
-			g_Ed25519.reset (new Ed25519 ());
-		return g_Ed25519; 
+			{
+				g_Ed25519 = std::make_shared<Ed25519>();
+				g_Ed25519ThisThread = g_Ed25519;
+			}	
+			else
+				g_Ed25519ThisThread = std::make_shared<Ed25519>(*g_Ed25519);
+		}	
+		return g_Ed25519ThisThread; 
 	}