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 | ||
23 | #include <pthread.h> | |
4318ae1b MD |
24 | #include <lttng/ust-events.h> |
25 | #include <lttng/ust-tracer.h> | |
26 | #include <lttng/ringbuffer-config.h> | |
8173ec7c MD |
27 | |
28 | static | |
29 | size_t pthread_id_get_size(size_t offset) | |
30 | { | |
31 | size_t size = 0; | |
32 | ||
8de38cf7 MD |
33 | size += lib_ring_buffer_align(offset, lttng_alignof(unsigned long)); |
34 | size += sizeof(unsigned long); | |
8173ec7c MD |
35 | return size; |
36 | } | |
37 | ||
38 | static | |
39 | void pthread_id_record(struct lttng_ctx_field *field, | |
4cfec15c | 40 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 41 | struct lttng_channel *chan) |
8173ec7c MD |
42 | { |
43 | unsigned long pthread_id; | |
44 | ||
45 | pthread_id = (unsigned long) pthread_self(); | |
46 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(pthread_id)); | |
47 | chan->ops->event_write(ctx, &pthread_id, sizeof(pthread_id)); | |
48 | } | |
49 | ||
77aa5901 MD |
50 | static |
51 | void pthread_id_get_value(struct lttng_ctx_field *field, | |
52 | union lttng_ctx_value *value) | |
53 | { | |
54 | unsigned long pthread_id; | |
55 | ||
56 | pthread_id = (unsigned long) pthread_self(); | |
57 | value->s64 = pthread_id; | |
58 | } | |
59 | ||
8173ec7c MD |
60 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx) |
61 | { | |
62 | struct lttng_ctx_field *field; | |
63 | ||
64 | field = lttng_append_context(ctx); | |
65 | if (!field) | |
66 | return -ENOMEM; | |
67 | if (lttng_find_context(*ctx, "pthread_id")) { | |
68 | lttng_remove_context_field(ctx, field); | |
69 | return -EEXIST; | |
70 | } | |
71 | field->event_field.name = "pthread_id"; | |
72 | field->event_field.type.atype = atype_integer; | |
8de38cf7 MD |
73 | field->event_field.type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT; |
74 | field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT; | |
3b402b40 | 75 | field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned long); |
8173ec7c MD |
76 | field->event_field.type.u.basic.integer.reverse_byte_order = 0; |
77 | field->event_field.type.u.basic.integer.base = 10; | |
78 | field->event_field.type.u.basic.integer.encoding = lttng_encode_none; | |
79 | field->get_size = pthread_id_get_size; | |
80 | field->record = pthread_id_record; | |
77aa5901 | 81 | field->get_value = pthread_id_get_value; |
8173ec7c MD |
82 | return 0; |
83 | } |