Add NULL pointer check
[lttng-tools.git] / include / lttng-share.h
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1/*
2 * Copyright (C) - 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
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6 * as published by the Free Software Foundation; only version 2
7 * of the License.
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8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#ifndef _LTTNG_SHARE_H
20#define _LTTNG_SHARE_H
21
f3ed775e 22/* Default channel attributes */
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23#define DEFAULT_CHANNEL_NAME "channel0"
24#define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */
7d452e12 25/* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
b389abbe 26#define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */
7d452e12 27/* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
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28#define DEFAULT_CHANNEL_SUBBUF_NUM 8
29#define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */
30#define DEFAULT_CHANNEL_READ_TIMER 200 /* usec */
31#define DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
32
33#define DEFAULT_METADATA_SUBBUF_SIZE 4096
91c06b6f 34#define DEFAULT_METADATA_SUBBUF_NUM 2
e6ddca71 35
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36/* Kernel has different defaults */
37
38/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
39#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE 262144 /* bytes */
40/* DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2 */
41#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM 4
42/* See lttng-kernel.h enum lttng_kernel_output for channel output */
43#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
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44
45/*
46 * lttng user-space instrumentation type
47 */
48enum lttng_ust_instrumentation {
49 LTTNG_UST_TRACEPOINT,
50 LTTNG_UST_MARKER,
51};
52
9bda164d 53#endif /* _LTTNG_SHARE_H */
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