Version 2.0.8

[lttng-ust.git] / libringbuffer / frontend_types.h

diff --git a/libringbuffer/frontend_types.h b/libringbuffer/frontend_types.h
index 1d47b275b6fabd3cdc2c5351771662b4989378f7..b6b34470ce28447b8f6dea168369078ec5a608ff 100644 (file)
--- a/libringbuffer/frontend_types.h
+++ b/libringbuffer/frontend_types.h
@@ -1,19 +1,31 @@
-#ifndef _LINUX_RING_BUFFER_FRONTEND_TYPES_H
-#define _LINUX_RING_BUFFER_FRONTEND_TYPES_H
+#ifndef _LTTNG_RING_BUFFER_FRONTEND_TYPES_H
+#define _LTTNG_RING_BUFFER_FRONTEND_TYPES_H
 
 /*
- * linux/ringbuffer/frontend_types.h
- *
- * (C) Copyright 2005-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * libringbuffer/frontend_types.h
  *
  * Ring Buffer Library Synchronization Header (types).
  *
+ * Copyright (C) 2005-2012 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.
- *
- * Dual LGPL v2.1/GPL v2 license.
  */
 
 #include <string.h>
@@ -34,7 +46,6 @@
 enum switch_mode { SWITCH_ACTIVE, SWITCH_FLUSH };
 
 /* channel: collection of per-cpu ring buffers. */
-#define RB_CHANNEL_PADDING     64
 struct channel {
        int record_disabled;
        unsigned long commit_count_mask;        /*
@@ -49,12 +60,12 @@ struct channel {
        //wait_queue_head_t read_wait;          /* reader wait queue */
        int finalized;                          /* Has channel been finalized */
        size_t priv_data_offset;
+       /* Note: padding field is missing */
        /*
         * Associated backend contains a variable-length array. Needs to
         * be last member.
         */
        struct channel_backend backend;         /* Associated backend */
-       char padding[RB_CHANNEL_PADDING];
 } __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
 
 /* Per-subbuffer commit counters used on the hot path */
@@ -153,4 +164,4 @@ void *channel_get_private(struct channel *chan)
                _____ret;                                               \
        })
 
-#endif /* _LINUX_RING_BUFFER_FRONTEND_TYPES_H */
+#endif /* _LTTNG_RING_BUFFER_FRONTEND_TYPES_H */