lib ring buffer must take private pointer copy before decrementing refcount
[lttng-modules.git] / ltt-tracer.h
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1#ifndef _LTT_TRACER_H
2#define _LTT_TRACER_H
3
1c8284eb 4/*
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5 * ltt-tracer.h
6 *
7 * Copyright (C) 2005-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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8 *
9 * This contains the definitions for the Linux Trace Toolkit tracer.
10 *
11 * Dual LGPL v2.1/GPL v2 license.
12 */
13
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14#include <stdarg.h>
15#include <linux/types.h>
16#include <linux/limits.h>
17#include <linux/list.h>
18#include <linux/cache.h>
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19#include <linux/timex.h>
20#include <linux/wait.h>
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21#include <asm/atomic.h>
22#include <asm/local.h>
23
f3bc08c5 24#include "wrapper/trace-clock.h"
1c8284eb 25#include "ltt-tracer-core.h"
1c25284c 26#include "ltt-events.h"
1c8284eb 27
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28#define LTTNG_VERSION 0
29#define LTTNG_PATCHLEVEL 9
30#define LTTNG_SUBLEVEL 1
31
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32#ifndef CHAR_BIT
33#define CHAR_BIT 8
34#endif
35
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36/* Number of bytes to log with a read/write event */
37#define LTT_LOG_RW_SIZE 32L
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38#define LTT_MAX_SMALL_SIZE 0xFFFFU
39
d793d5e1 40#ifdef RING_BUFFER_ALIGN
d793d5e1 41#define ltt_alignof(type) __alignof__(type)
c099397a 42#else
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43#define ltt_alignof(type) 1
44#endif
1c8284eb 45
1c8284eb 46/* Tracer properties */
1c25284c 47#define CTF_MAGIC_NUMBER 0xC1FC1FC1
881833e3 48#define TSDL_MAGIC_NUMBER 0x75D11D57
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49
50/* CTF specification version followed */
51#define CTF_SPEC_MAJOR 1
52#define CTF_SPEC_MINOR 8
53
54/* Tracer major/minor versions */
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55#define CTF_VERSION_MAJOR 0
56#define CTF_VERSION_MINOR 1
1c8284eb 57
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58/*
59 * Number of milliseconds to retry before failing metadata writes on buffer full
60 * condition. (10 seconds)
61 */
62#define LTTNG_METADATA_TIMEOUT_MSEC 10000
63
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64#define LTT_RFLAG_EXTENDED RING_BUFFER_RFLAG_END
65#define LTT_RFLAG_END (LTT_RFLAG_EXTENDED << 1)
66
1c8284eb 67#endif /* _LTT_TRACER_H */
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