Commit | Line | Data |
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8173ec7c | 1 | /* |
e92f3e28 | 2 | * lttng-context-pthread-id.c |
8173ec7c MD |
3 | * |
4 | * LTTng UST pthread_id context. | |
5 | * | |
e92f3e28 MD |
6 | * Copyright (C) 2009-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
7 | * | |
8 | * This library is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; only | |
11 | * version 2.1 of the License. | |
12 | * | |
13 | * This library is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with this library; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
8173ec7c MD |
21 | */ |
22 | ||
3fbec7dc | 23 | #define _LGPL_SOURCE |
b4051ad8 | 24 | #include <stddef.h> |
8173ec7c | 25 | #include <pthread.h> |
4318ae1b MD |
26 | #include <lttng/ust-events.h> |
27 | #include <lttng/ust-tracer.h> | |
28 | #include <lttng/ringbuffer-config.h> | |
8173ec7c MD |
29 | |
30 | static | |
53569322 | 31 | size_t pthread_id_get_size(struct lttng_ctx_field *field, size_t offset) |
8173ec7c MD |
32 | { |
33 | size_t size = 0; | |
34 | ||
8de38cf7 MD |
35 | size += lib_ring_buffer_align(offset, lttng_alignof(unsigned long)); |
36 | size += sizeof(unsigned long); | |
8173ec7c MD |
37 | return size; |
38 | } | |
39 | ||
40 | static | |
41 | void pthread_id_record(struct lttng_ctx_field *field, | |
4cfec15c | 42 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 43 | struct lttng_channel *chan) |
8173ec7c MD |
44 | { |
45 | unsigned long pthread_id; | |
46 | ||
47 | pthread_id = (unsigned long) pthread_self(); | |
48 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(pthread_id)); | |
49 | chan->ops->event_write(ctx, &pthread_id, sizeof(pthread_id)); | |
50 | } | |
51 | ||
77aa5901 MD |
52 | static |
53 | void pthread_id_get_value(struct lttng_ctx_field *field, | |
53569322 | 54 | struct lttng_ctx_value *value) |
77aa5901 | 55 | { |
6e9ac4ae | 56 | value->u.s64 = (unsigned long) pthread_self(); |
77aa5901 MD |
57 | } |
58 | ||
8173ec7c MD |
59 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx) |
60 | { | |
61 | struct lttng_ctx_field *field; | |
62 | ||
63 | field = lttng_append_context(ctx); | |
64 | if (!field) | |
65 | return -ENOMEM; | |
66 | if (lttng_find_context(*ctx, "pthread_id")) { | |
67 | lttng_remove_context_field(ctx, field); | |
68 | return -EEXIST; | |
69 | } | |
70 | field->event_field.name = "pthread_id"; | |
71 | field->event_field.type.atype = atype_integer; | |
8de38cf7 MD |
72 | field->event_field.type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT; |
73 | field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT; | |
3b402b40 | 74 | field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned long); |
8173ec7c MD |
75 | field->event_field.type.u.basic.integer.reverse_byte_order = 0; |
76 | field->event_field.type.u.basic.integer.base = 10; | |
77 | field->event_field.type.u.basic.integer.encoding = lttng_encode_none; | |
78 | field->get_size = pthread_id_get_size; | |
79 | field->record = pthread_id_record; | |
77aa5901 | 80 | field->get_value = pthread_id_get_value; |
b2cc986a | 81 | lttng_context_update(*ctx); |
8173ec7c MD |
82 | return 0; |
83 | } |