-#ifndef _LIB_RING_BUFFER_FRONTEND_TYPES_H
-#define _LIB_RING_BUFFER_FRONTEND_TYPES_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
+ *
* lib/ringbuffer/frontend_types.h
*
* Ring Buffer Library Synchronization Header (types).
*
* Copyright (C) 2010-2012 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
- *
- * Author:
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* See ring_buffer_frontend.c for more information on wait-free algorithms.
*/
+#ifndef _LIB_RING_BUFFER_FRONTEND_TYPES_H
+#define _LIB_RING_BUFFER_FRONTEND_TYPES_H
+
#include <linux/kref.h>
#include <wrapper/ringbuffer/config.h>
#include <wrapper/ringbuffer/backend_types.h>
-#include <wrapper/spinlock.h>
#include <lib/prio_heap/lttng_prio_heap.h> /* For per-CPU read-side iterator */
#include <lttng-cpuhotplug.h>
struct commit_counters_cold *commit_cold;
/* Commit count per sub-buffer */
+ u64 *ts_end; /*
+ * timestamp_end per sub-buffer.
+ * Time is sampled by the
+ * switch_*_end() callbacks which
+ * are the last space reservation
+ * performed in the sub-buffer
+ * before it can be fully
+ * committed and delivered. This
+ * time value is then read by
+ * the deliver callback,
+ * performed by the last commit
+ * before the buffer becomes
+ * readable.
+ */
atomic_long_t active_readers; /*
* Active readers count
* standard atomic access (shared)