2 * lttng-context-pthread-id.c
4 * LTTng UST pthread_id context.
6 * Copyright (C) 2009-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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
25 #include <lttng/ust-events.h>
26 #include <lttng/ust-tracer.h>
27 #include <lttng/ringbuffer-config.h>
30 size_t pthread_id_get_size(struct lttng_ctx_field
*field
, size_t offset
)
34 size
+= lib_ring_buffer_align(offset
, lttng_alignof(unsigned long));
35 size
+= sizeof(unsigned long);
40 void pthread_id_record(struct lttng_ctx_field
*field
,
41 struct lttng_ust_lib_ring_buffer_ctx
*ctx
,
42 struct lttng_channel
*chan
)
44 unsigned long pthread_id
;
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
));
52 void pthread_id_get_value(struct lttng_ctx_field
*field
,
53 struct lttng_ctx_value
*value
)
55 value
->u
.s64
= (unsigned long) pthread_self();
58 int lttng_add_pthread_id_to_ctx(struct lttng_ctx
**ctx
)
60 struct lttng_ctx_field
*field
;
62 field
= lttng_append_context(ctx
);
65 if (lttng_find_context(*ctx
, "pthread_id")) {
66 lttng_remove_context_field(ctx
, field
);
69 field
->event_field
.name
= "pthread_id";
70 field
->event_field
.type
.atype
= atype_integer
;
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
;
73 field
->event_field
.type
.u
.basic
.integer
.signedness
= lttng_is_signed_type(unsigned long);
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
;
79 field
->get_value
= pthread_id_get_value
;
80 lttng_context_update(*ctx
);