Commit | Line | Data |
---|---|---|
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 |
8173ec7c | 24 | #include <pthread.h> |
4318ae1b MD |
25 | #include <lttng/ust-events.h> |
26 | #include <lttng/ust-tracer.h> | |
27 | #include <lttng/ringbuffer-config.h> | |
8173ec7c MD |
28 | |
29 | static | |
53569322 | 30 | size_t pthread_id_get_size(struct lttng_ctx_field *field, size_t offset) |
8173ec7c MD |
31 | { |
32 | size_t size = 0; | |
33 | ||
8de38cf7 MD |
34 | size += lib_ring_buffer_align(offset, lttng_alignof(unsigned long)); |
35 | size += sizeof(unsigned long); | |
8173ec7c MD |
36 | return size; |
37 | } | |
38 | ||
39 | static | |
40 | void pthread_id_record(struct lttng_ctx_field *field, | |
4cfec15c | 41 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
7dd08bec | 42 | struct lttng_channel *chan) |
8173ec7c MD |
43 | { |
44 | unsigned long pthread_id; | |
45 | ||
46 | pthread_id = (unsigned long) pthread_self(); | |
47 | lib_ring_buffer_align_ctx(ctx, lttng_alignof(pthread_id)); | |
48 | chan->ops->event_write(ctx, &pthread_id, sizeof(pthread_id)); | |
49 | } | |
50 | ||
77aa5901 MD |
51 | static |
52 | void pthread_id_get_value(struct lttng_ctx_field *field, | |
53569322 | 53 | struct lttng_ctx_value *value) |
77aa5901 | 54 | { |
6e9ac4ae | 55 | value->u.s64 = (unsigned long) pthread_self(); |
77aa5901 MD |
56 | } |
57 | ||
8173ec7c MD |
58 | int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx) |
59 | { | |
60 | struct lttng_ctx_field *field; | |
61 | ||
62 | field = lttng_append_context(ctx); | |
63 | if (!field) | |
64 | return -ENOMEM; | |
65 | if (lttng_find_context(*ctx, "pthread_id")) { | |
66 | lttng_remove_context_field(ctx, field); | |
67 | return -EEXIST; | |
68 | } | |
69 | field->event_field.name = "pthread_id"; | |
70 | field->event_field.type.atype = atype_integer; | |
8de38cf7 MD |
71 | field->event_field.type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT; |
72 | field->event_field.type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT; | |
3b402b40 | 73 | field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(unsigned long); |
8173ec7c MD |
74 | field->event_field.type.u.basic.integer.reverse_byte_order = 0; |
75 | field->event_field.type.u.basic.integer.base = 10; | |
76 | field->event_field.type.u.basic.integer.encoding = lttng_encode_none; | |
77 | field->get_size = pthread_id_get_size; | |
78 | field->record = pthread_id_record; | |
77aa5901 | 79 | field->get_value = pthread_id_get_value; |
b2cc986a | 80 | lttng_context_update(*ctx); |
8173ec7c MD |
81 | return 0; |
82 | } |