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Version 2.11.5
[lttng-modules.git]
/
lib
/
ringbuffer
/
frontend.h
diff --git
a/lib/ringbuffer/frontend.h
b/lib/ringbuffer/frontend.h
index 85858d936ca0c3f43ad1c8b84f5f569b1e5e2e54..6f516d989d2add911dd186c7ea3e316f1522a883 100644
(file)
--- a/
lib/ringbuffer/frontend.h
+++ b/
lib/ringbuffer/frontend.h
@@
-1,21
+1,17
@@
-#ifndef _LINUX_RING_BUFFER_FRONTEND_H
-#define _LINUX_RING_BUFFER_FRONTEND_H
-
-/*
- * linux/ringbuffer/frontend.h
+/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
*
*
- *
(C) Copyright 2005-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
lib/ringbuffer/frontend.h
*
* Ring Buffer Library Synchronization Header (API).
*
*
* Ring Buffer Library Synchronization Header (API).
*
- * Author:
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* See ring_buffer_frontend.c for more information on wait-free algorithms.
*
* See ring_buffer_frontend.c for more information on wait-free algorithms.
- *
- * Dual LGPL v2.1/GPL v2 license.
*/
*/
+#ifndef _LIB_RING_BUFFER_FRONTEND_H
+#define _LIB_RING_BUFFER_FRONTEND_H
+
#include <linux/pipe_fs_i.h>
#include <linux/rcupdate.h>
#include <linux/cpumask.h>
#include <linux/pipe_fs_i.h>
#include <linux/rcupdate.h>
#include <linux/cpumask.h>
@@
-37,7
+33,10
@@
#include <asm/local.h>
/* Internal helpers */
#include <asm/local.h>
/* Internal helpers */
-#include "../../wrapper/ringbuffer/frontend_internal.h"
+#include <wrapper/ringbuffer/frontend_internal.h>
+
+/* Max ring buffer nesting count, see lib_ring_buffer_get_cpu(). */
+#define RING_BUFFER_MAX_NESTING 4
/* Buffer creation/removal and setup operations */
/* Buffer creation/removal and setup operations */
@@
-94,6
+93,10
@@
extern void lib_ring_buffer_release_read(struct lib_ring_buffer *buf);
extern int lib_ring_buffer_snapshot(struct lib_ring_buffer *buf,
unsigned long *consumed,
unsigned long *produced);
extern int lib_ring_buffer_snapshot(struct lib_ring_buffer *buf,
unsigned long *consumed,
unsigned long *produced);
+extern int lib_ring_buffer_snapshot_sample_positions(
+ struct lib_ring_buffer *buf,
+ unsigned long *consumed,
+ unsigned long *produced);
extern void lib_ring_buffer_move_consumer(struct lib_ring_buffer *buf,
unsigned long consumed_new);
extern void lib_ring_buffer_move_consumer(struct lib_ring_buffer *buf,
unsigned long consumed_new);
@@
-101,6
+104,9
@@
extern int lib_ring_buffer_get_subbuf(struct lib_ring_buffer *buf,
unsigned long consumed);
extern void lib_ring_buffer_put_subbuf(struct lib_ring_buffer *buf);
unsigned long consumed);
extern void lib_ring_buffer_put_subbuf(struct lib_ring_buffer *buf);
+void lib_ring_buffer_set_quiescent_channel(struct channel *chan);
+void lib_ring_buffer_clear_quiescent_channel(struct channel *chan);
+
/*
* lib_ring_buffer_get_next_subbuf/lib_ring_buffer_put_next_subbuf are helpers
* to read sub-buffers sequentially.
/*
* lib_ring_buffer_get_next_subbuf/lib_ring_buffer_put_next_subbuf are helpers
* to read sub-buffers sequentially.
@@
-149,7
+155,7
@@
static inline
int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
struct lib_ring_buffer *buf)
{
int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
struct lib_ring_buffer *buf)
{
- int finalized =
ACCESS
_ONCE(buf->finalized);
+ int finalized =
READ
_ONCE(buf->finalized);
/*
* Read finalized before counters.
*/
/*
* Read finalized before counters.
*/
@@
-163,6
+169,12
@@
int lib_ring_buffer_channel_is_finalized(const struct channel *chan)
return chan->finalized;
}
return chan->finalized;
}
+static inline
+int lib_ring_buffer_channel_is_disabled(const struct channel *chan)
+{
+ return atomic_read(&chan->record_disabled);
+}
+
static inline
unsigned long lib_ring_buffer_get_read_data_size(
const struct lib_ring_buffer_config *config,
static inline
unsigned long lib_ring_buffer_get_read_data_size(
const struct lib_ring_buffer_config *config,
@@
-219,4
+231,4
@@
unsigned long lib_ring_buffer_get_records_read(
return v_read(config, &buf->backend.records_read);
}
return v_read(config, &buf->backend.records_read);
}
-#endif /* _LI
NUX
_RING_BUFFER_FRONTEND_H */
+#endif /* _LI
B
_RING_BUFFER_FRONTEND_H */
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