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9bda164d | 1 | /* |
e848fc76 DG |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
9bda164d | 4 | * |
e848fc76 DG |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; only version 2 of the License. | |
9bda164d | 8 | * |
e848fc76 DG |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
9bda164d | 13 | * |
e848fc76 DG |
14 | * You should have received a copy of the GNU General Public License along with |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307, USA. | |
9bda164d DG |
17 | */ |
18 | ||
19 | #ifndef _LTTNG_SHARE_H | |
20 | #define _LTTNG_SHARE_H | |
21 | ||
e848fc76 DG |
22 | #include <stdlib.h> |
23 | ||
28ca4a8b DG |
24 | #include <lttng/lttng.h> |
25 | ||
f6a9efaa DG |
26 | /* Default size of a hash table */ |
27 | #define DEFAULT_HT_SIZE 32 | |
28 | ||
f3ed775e | 29 | /* Default channel attributes */ |
3817e7df DG |
30 | #define DEFAULT_CHANNEL_NAME "channel0" |
31 | #define DEFAULT_CHANNEL_OVERWRITE 0 /* usec */ | |
7d452e12 | 32 | /* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */ |
3817e7df | 33 | #define DEFAULT_CHANNEL_SUBBUF_SIZE 4096 /* bytes */ |
7d452e12 | 34 | /* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */ |
3817e7df DG |
35 | #define DEFAULT_CHANNEL_SUBBUF_NUM 8 |
36 | #define DEFAULT_CHANNEL_SWITCH_TIMER 0 /* usec */ | |
b389abbe | 37 | #define DEFAULT_CHANNEL_READ_TIMER 200 /* usec */ |
3817e7df | 38 | #define DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP |
b389abbe | 39 | |
3817e7df DG |
40 | #define DEFAULT_METADATA_SUBBUF_SIZE 4096 |
41 | #define DEFAULT_METADATA_SUBBUF_NUM 2 | |
e6ddca71 | 42 | |
b389abbe MD |
43 | /* Kernel has different defaults */ |
44 | ||
45 | /* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */ | |
3817e7df | 46 | #define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE 262144 /* bytes */ |
b389abbe | 47 | /* DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2 */ |
3817e7df | 48 | #define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM 4 |
b389abbe | 49 | /* See lttng-kernel.h enum lttng_kernel_output for channel output */ |
3817e7df | 50 | #define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE |
f3ed775e | 51 | |
0b0dd29a DG |
52 | /* User space defaults */ |
53 | ||
54 | /* Must be a power of 2 */ | |
55 | #define DEFAULT_UST_CHANNEL_SUBBUF_SIZE 4096 /* bytes */ | |
56 | /* Must be a power of 2 */ | |
57 | #define DEFAULT_UST_CHANNEL_SUBBUF_NUM 4 | |
28ca4a8b | 58 | /* See lttng-ust.h enum lttng_ust_output */ |
d41f73b7 | 59 | #define DEFAULT_UST_CHANNEL_OUTPUT LTTNG_EVENT_MMAP |
0b0dd29a | 60 | |
ee0b0061 DG |
61 | /* |
62 | * Default timeout value for the sem_timedwait() call. Blocking forever is not | |
63 | * wanted so a timeout is used to control the data flow and not freeze the | |
64 | * session daemon. | |
65 | */ | |
66 | #define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */ | |
67 | ||
5eb91c98 DG |
68 | /* |
69 | * Takes a pointer x and transform it so we can use it to access members | |
70 | * without a function call. Here an example: | |
71 | * | |
72 | * #define GET_SIZE(x) LTTNG_REF(x)->size | |
73 | * | |
74 | * struct { int size; } s; | |
75 | * | |
76 | * printf("size : %d\n", GET_SIZE(&s)); | |
77 | * | |
78 | * For this example we can't use something like this for compatibility purpose | |
79 | * since this will fail: | |
80 | * | |
81 | * #define GET_SIZE(x) x->size; | |
82 | * | |
83 | * This is mostly use for the compatibility layer of lttng-tools. See | |
e848fc76 | 84 | * poll/epoll for a good example. Since x can be on the stack or allocated |
5eb91c98 | 85 | * memory using malloc(), we must use generic accessors for compat in order to |
e848fc76 | 86 | * *not* use a function to access members and not the variable name. |
5eb91c98 DG |
87 | */ |
88 | #define LTTNG_REF(x) ((typeof(*x) *)(x)) | |
89 | ||
90 | /* | |
91 | * Memory allocation zeroed | |
92 | */ | |
93 | #define zmalloc(x) calloc(1, x) | |
94 | ||
e848fc76 DG |
95 | #ifndef ARRAY_SIZE |
96 | #define ARRAY_SIZE(array) (sizeof(array) / (sizeof((array)[0]))) | |
97 | #endif | |
98 | ||
99 | ||
9bda164d | 100 | #endif /* _LTTNG_SHARE_H */ |