Support for multi-threaded sniffer. Add support for atomic operations instead of mutex in wc_port.h.

wolfcrypt/src/wc_port.c

@@ -1061,8 +1061,7 @@ size_t wc_strlcat(char *dst, const char *src, size_t dstSize)
 }
 #endif /* USE_WOLF_STRLCAT */
 
-#ifndef SINGLE_THREADED
-/* TODO: use atomic operations instead of mutex */
+#if !defined(SINGLE_THREADED) && !defined(HAVE_C___ATOMIC)
 void wolfSSL_RefInit(wolfSSL_Ref* ref, int* err)
 {
     int ret = wc_InitMutex(&ref->mutex);