--- /dev/null
+#ifndef _LIBCOUNTER_SHM_INTERNAL_H
+#define _LIBCOUNTER_SHM_INTERNAL_H
+
+/*
+ * libcounter/shm_internal.h
+ *
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+struct lttng_counter_shm_ref {
+ volatile ssize_t index; /* within the object table */
+ volatile ssize_t offset; /* within the object */
+};
+
+#define DECLARE_LTTNG_COUNTER_SHMP(type, name) \
+ union { \
+ struct lttng_counter_shm_ref _ref; \
+ type *_type; \
+ } name
+
+#endif /* _LIBCOUNTER_SHM_INTERNAL_H */