Version 2.0.8

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

diff --git a/libringbuffer/frontend_api.h b/libringbuffer/frontend_api.h
index d5a2f2a043cb892a0ef020bfd7ef9b137978debb..6a06bba2c2393ba139bc506a8f88bb4027b59ea9 100644 (file)
--- a/libringbuffer/frontend_api.h
+++ b/libringbuffer/frontend_api.h
@@ -1,20 +1,33 @@
-#ifndef _LINUX_RING_BUFFER_FRONTEND_API_H
-#define _LINUX_RING_BUFFER_FRONTEND_API_H
+#ifndef _LTTNG_RING_BUFFER_FRONTEND_API_H
+#define _LTTNG_RING_BUFFER_FRONTEND_API_H
 
 /*
- * linux/ringbuffer/frontend_api.h
+ * libringbuffer/frontend_api.h
  *
- * (C) Copyright 2005-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 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
  *
  * Ring Buffer Library Synchronization Header (buffer write API).
  *
  * Author:
- *     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * See ring_buffer_frontend.c for more information on wait-free algorithms.
- * See linux/ringbuffer/frontend.h for channel allocation and read-side API.
- *
- * Dual LGPL v2.1/GPL v2 license.
+ * See ring_buffer_frontend.c for more information on wait-free
+ * algorithms.
+ * See frontend.h for channel allocation and read-side API.
  */
 
 #include "frontend.h"
@@ -93,18 +106,8 @@ int lib_ring_buffer_try_reserve(const struct lttng_ust_lib_ring_buffer_config *c
         */
        //prefetch(&buf->commit_hot[subbuf_index(*o_begin, chan)]);
 
-       /*
-        * Because we don't use any timer in the application, we
-        * currently cannot guarantee that we have frequent
-        * events that let us detect 27-bit overflows.
-        * Therefore, for now, we force event headers
-        * to contain 64-bit timestamps.
-        */
-       ctx->rflags |= RING_BUFFER_RFLAG_FULL_TSC;
-#if 0
        if (last_tsc_overflow(config, buf, ctx->tsc))
                ctx->rflags |= RING_BUFFER_RFLAG_FULL_TSC;
-#endif //0
 
        if (caa_unlikely(subbuf_offset(*o_begin, chan) == 0))
                return 1;
@@ -361,4 +364,4 @@ void lib_ring_buffer_record_enable(const struct lttng_ust_lib_ring_buffer_config
        uatomic_dec(&buf->record_disabled);
 }
 
-#endif /* _LINUX_RING_BUFFER_FRONTEND_API_H */
+#endif /* _LTTNG_RING_BUFFER_FRONTEND_API_H */