-#ifndef _LTTNG_RING_BUFFER_BACKEND_TYPES_H
-#define _LTTNG_RING_BUFFER_BACKEND_TYPES_H
-
/*
- * linux/ringbuffer/backend_types.h
- *
- * Ring buffer backend (types).
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2008-2012 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
+ * Ring buffer backend (types).
*/
+#ifndef _LTTNG_RING_BUFFER_BACKEND_TYPES_H
+#define _LTTNG_RING_BUFFER_BACKEND_TYPES_H
+
#include <limits.h>
+#include <stdint.h>
#include "shm_internal.h"
#include "vatomic.h"
unsigned long id; /* backend subbuffer identifier */
};
+struct lttng_ust_lib_ring_buffer_backend_counts {
+ /*
+ * Counter specific to the sub-buffer location within the ring buffer.
+ * The actual sequence number of the packet within the entire ring
+ * buffer can be derived from the formula nr_subbuffers * seq_cnt +
+ * subbuf_idx.
+ */
+ uint64_t seq_cnt; /* packet sequence number */
+};
+
/*
* Forward declaration of frontend-specific channel and ring_buffer.
*/
DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_subbuffer, buf_wsb);
/* ring_buffer_backend_subbuffer for reader */
struct lttng_ust_lib_ring_buffer_backend_subbuffer buf_rsb;
+ /* Array of lib_ring_buffer_backend_counts for the packet counter */
+ DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_counts, buf_cnt);
/*
* Pointer array of backend pages, for whole buffer.
* Indexed by ring_buffer_backend_subbuffer identifier (id) index.