API fix: packet_seek should take an index rather than offset
[babeltrace.git] / include / babeltrace / format.h
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1#ifndef _BABELTRACE_FORMAT_H
2#define _BABELTRACE_FORMAT_H
3
4/*
5 * BabelTrace
6 *
7 * Trace Format Header
8 *
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9 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
10 *
11 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fc93b2bd 12 *
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13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this software and associated documentation files (the "Software"), to deal
15 * in the Software without restriction, including without limitation the rights
16 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17 * copies of the Software, and to permit persons to whom the Software is
18 * furnished to do so, subject to the following conditions:
fc93b2bd 19 *
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20 * The above copyright notice and this permission notice shall be included in
21 * all copies or substantial portions of the Software.
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22 */
23
3122e6f0 24#include <babeltrace/list.h>
fc93b2bd 25#include <stdint.h>
7fb21036 26#include <stdio.h>
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27
28typedef int bt_intern_str;
fc93b2bd 29
95d36295 30/* forward declaration */
d6425aaf 31struct stream_pos;
95d36295 32
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33/* Parent trace descriptor */
34struct trace_descriptor {
35};
bbefb8dd 36
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37struct mmap_stream {
38 int fd;
3122e6f0 39 struct bt_list_head list;
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40};
41
42struct mmap_stream_list {
3122e6f0 43 struct bt_list_head head;
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44};
45
fc93b2bd 46struct format {
34861b9d 47 bt_intern_str name;
fc93b2bd 48
5b80ddfb 49 struct trace_descriptor *(*open_trace)(const char *path, int flags,
06789ffd 50 void (*packet_seek)(struct stream_pos *pos,
20d0dcf9 51 size_t index, int whence),
d6425aaf 52 FILE *metadata_fp);
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53 struct trace_descriptor *(*open_mmap_trace)(
54 struct mmap_stream_list *mmap_list,
06789ffd 55 void (*packet_seek)(struct stream_pos *pos,
20d0dcf9 56 size_t index, int whence),
d6425aaf 57 FILE *metadata_fp);
bbefb8dd 58 void (*close_trace)(struct trace_descriptor *descriptor);
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59};
60
34861b9d 61extern struct format *bt_lookup_format(bt_intern_str qname);
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62extern void bt_fprintf_format_list(FILE *fp);
63extern int bt_register_format(struct format *format);
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64
65/* TBD: format unregistration */
66
67#endif /* _BABELTRACE_FORMAT_H */
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