2 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
3 * Copyright 2017 Philippe Proulx <pproulx@efficios.com>
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 #define BT_COMP_LOG_SELF_COMP (dmesg_comp->self_comp)
25 #define BT_LOG_OUTPUT_LEVEL (dmesg_comp->log_level)
26 #define BT_LOG_TAG "PLUGIN/SRC.TEXT.DMESG"
27 #include "logging/comp-logging.h"
35 #include "common/common.h"
36 #include "common/assert.h"
37 #include <babeltrace2/babeltrace.h>
38 #include "compat/utc.h"
39 #include "compat/stdio.h"
41 #include "plugins/common/param-validation/param-validation.h"
43 #define NSEC_PER_USEC 1000UL
44 #define NSEC_PER_MSEC 1000000UL
45 #define NSEC_PER_SEC 1000000000ULL
46 #define USEC_PER_SEC 1000000UL
48 struct dmesg_component
;
50 struct dmesg_msg_iter
{
51 struct dmesg_component
*dmesg_comp
;
54 bt_self_message_iterator
*self_msg_iter
;
59 bt_message
*tmp_event_msg
;
60 uint64_t last_clock_value
;
63 STATE_EMIT_STREAM_BEGINNING
,
65 STATE_EMIT_STREAM_END
,
70 struct dmesg_component
{
71 bt_logging_level log_level
;
75 bt_bool read_from_stdin
;
79 bt_self_component_source
*self_comp_src
;
80 bt_self_component
*self_comp
;
81 bt_trace_class
*trace_class
;
82 bt_stream_class
*stream_class
;
83 bt_event_class
*event_class
;
86 bt_clock_class
*clock_class
;
90 bt_field_class
*create_event_payload_fc(struct dmesg_component
*dmesg_comp
,
91 bt_trace_class
*trace_class
)
93 bt_field_class
*root_fc
= NULL
;
94 bt_field_class
*fc
= NULL
;
97 root_fc
= bt_field_class_structure_create(trace_class
);
99 BT_COMP_LOGE_STR("Cannot create an empty structure field class object.");
103 fc
= bt_field_class_string_create(trace_class
);
105 BT_COMP_LOGE_STR("Cannot create a string field class object.");
109 ret
= bt_field_class_structure_append_member(root_fc
,
112 BT_COMP_LOGE("Cannot add `str` member to structure field class: "
120 BT_FIELD_CLASS_PUT_REF_AND_RESET(root_fc
);
123 bt_field_class_put_ref(fc
);
128 int create_meta(struct dmesg_component
*dmesg_comp
, bool has_ts
)
130 bt_field_class
*fc
= NULL
;
133 dmesg_comp
->trace_class
= bt_trace_class_create(dmesg_comp
->self_comp
);
134 if (!dmesg_comp
->trace_class
) {
135 BT_COMP_LOGE_STR("Cannot create an empty trace class object.");
139 dmesg_comp
->stream_class
= bt_stream_class_create(
140 dmesg_comp
->trace_class
);
141 if (!dmesg_comp
->stream_class
) {
142 BT_COMP_LOGE_STR("Cannot create a stream class object.");
147 dmesg_comp
->clock_class
= bt_clock_class_create(
148 dmesg_comp
->self_comp
);
149 if (!dmesg_comp
->clock_class
) {
150 BT_COMP_LOGE_STR("Cannot create clock class.");
155 * The `dmesg` timestamp's origin is not the Unix epoch,
156 * it's the boot time.
158 bt_clock_class_set_origin_is_unix_epoch(dmesg_comp
->clock_class
,
161 ret
= bt_stream_class_set_default_clock_class(
162 dmesg_comp
->stream_class
, dmesg_comp
->clock_class
);
164 BT_COMP_LOGE_STR("Cannot set stream class's default clock class.");
169 dmesg_comp
->event_class
= bt_event_class_create(
170 dmesg_comp
->stream_class
);
171 if (!dmesg_comp
->event_class
) {
172 BT_COMP_LOGE_STR("Cannot create an event class object.");
176 ret
= bt_event_class_set_name(dmesg_comp
->event_class
, "string");
178 BT_COMP_LOGE_STR("Cannot set event class's name.");
182 fc
= create_event_payload_fc(dmesg_comp
, dmesg_comp
->trace_class
);
184 BT_COMP_LOGE_STR("Cannot create event payload field class.");
188 ret
= bt_event_class_set_payload_field_class(dmesg_comp
->event_class
, fc
);
190 BT_COMP_LOGE_STR("Cannot set event class's event payload field class.");
200 bt_field_class_put_ref(fc
);
204 struct bt_param_validation_map_value_entry_descr dmesg_params
[] = {
205 { "no-extract-timestamp", BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL
, { .type
= BT_VALUE_TYPE_BOOL
} },
206 { "path", BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL
, { .type
= BT_VALUE_TYPE_STRING
} },
207 BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
211 bt_component_class_initialize_method_status
handle_params(
212 struct dmesg_component
*dmesg_comp
,
213 const bt_value
*params
)
215 const bt_value
*no_timestamp
= NULL
;
216 const bt_value
*path
= NULL
;
217 bt_component_class_initialize_method_status status
;
218 enum bt_param_validation_status validation_status
;
219 gchar
*validate_error
= NULL
;
221 validation_status
= bt_param_validation_validate(params
,
222 dmesg_params
, &validate_error
);
223 if (validation_status
== BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR
) {
224 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
226 } else if (validation_status
== BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR
) {
227 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
228 BT_COMP_LOGE_APPEND_CAUSE(dmesg_comp
->self_comp
,
229 "%s", validate_error
);
233 no_timestamp
= bt_value_map_borrow_entry_value_const(params
,
234 "no-extract-timestamp");
236 dmesg_comp
->params
.no_timestamp
=
237 bt_value_bool_get(no_timestamp
);
240 path
= bt_value_map_borrow_entry_value_const(params
, "path");
242 const char *path_str
= bt_value_string_get(path
);
244 g_string_assign(dmesg_comp
->params
.path
, path_str
);
246 dmesg_comp
->params
.read_from_stdin
= true;
249 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
;
251 g_free(validate_error
);
257 int create_stream_and_trace(struct dmesg_component
*dmesg_comp
)
260 const char *trace_name
= NULL
;
261 gchar
*basename
= NULL
;
263 dmesg_comp
->trace
= bt_trace_create(dmesg_comp
->trace_class
);
264 if (!dmesg_comp
->trace
) {
265 BT_COMP_LOGE_STR("Cannot create trace object.");
269 if (dmesg_comp
->params
.read_from_stdin
) {
270 trace_name
= "STDIN";
272 basename
= g_path_get_basename(dmesg_comp
->params
.path
->str
);
275 if (strcmp(basename
, G_DIR_SEPARATOR_S
) != 0 &&
276 strcmp(basename
, ".") != 0) {
277 trace_name
= basename
;
282 ret
= bt_trace_set_name(dmesg_comp
->trace
, trace_name
);
284 BT_COMP_LOGE("Cannot set trace's name: name=\"%s\"",
290 dmesg_comp
->stream
= bt_stream_create(dmesg_comp
->stream_class
,
292 if (!dmesg_comp
->stream
) {
293 BT_COMP_LOGE_STR("Cannot create stream object.");
309 int try_create_meta_stream(struct dmesg_component
*dmesg_comp
, bool has_ts
)
313 if (dmesg_comp
->trace
) {
314 /* Already created */
318 ret
= create_meta(dmesg_comp
, has_ts
);
320 BT_COMP_LOGE("Cannot create metadata objects: dmesg-comp-addr=%p",
325 ret
= create_stream_and_trace(dmesg_comp
);
327 BT_COMP_LOGE("Cannot create stream object: "
328 "dmesg-comp-addr=%p", dmesg_comp
);
342 void destroy_dmesg_component(struct dmesg_component
*dmesg_comp
)
348 if (dmesg_comp
->params
.path
) {
349 g_string_free(dmesg_comp
->params
.path
, TRUE
);
352 bt_trace_put_ref(dmesg_comp
->trace
);
353 bt_stream_class_put_ref(dmesg_comp
->stream_class
);
354 bt_event_class_put_ref(dmesg_comp
->event_class
);
355 bt_stream_put_ref(dmesg_comp
->stream
);
356 bt_clock_class_put_ref(dmesg_comp
->clock_class
);
357 bt_trace_class_put_ref(dmesg_comp
->trace_class
);
362 bt_component_class_initialize_method_status
create_port(
363 bt_self_component_source
*self_comp
)
365 bt_component_class_initialize_method_status status
;
366 bt_self_component_add_port_status add_port_status
;
368 add_port_status
= bt_self_component_source_add_output_port(self_comp
,
370 switch (add_port_status
) {
371 case BT_SELF_COMPONENT_ADD_PORT_STATUS_OK
:
372 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
;
374 case BT_SELF_COMPONENT_ADD_PORT_STATUS_ERROR
:
375 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
377 case BT_SELF_COMPONENT_ADD_PORT_STATUS_MEMORY_ERROR
:
378 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
388 bt_component_class_initialize_method_status
dmesg_init(
389 bt_self_component_source
*self_comp_src
,
390 bt_self_component_source_configuration
*config
,
391 const bt_value
*params
, void *init_method_data
)
393 struct dmesg_component
*dmesg_comp
= g_new0(struct dmesg_component
, 1);
394 bt_component_class_initialize_method_status status
;
395 bt_self_component
*self_comp
=
396 bt_self_component_source_as_self_component(self_comp_src
);
397 const bt_component
*comp
= bt_self_component_as_component(self_comp
);
398 bt_logging_level log_level
= bt_component_get_logging_level(comp
);
401 /* Implicit log level is not available here */
402 BT_COMP_LOG_CUR_LVL(BT_LOG_ERROR
, log_level
, self_comp
,
403 "Failed to allocate one dmesg component structure.");
404 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
408 dmesg_comp
->log_level
= log_level
;
409 dmesg_comp
->self_comp
= self_comp
;
410 dmesg_comp
->self_comp_src
= self_comp_src
;
411 dmesg_comp
->params
.path
= g_string_new(NULL
);
412 if (!dmesg_comp
->params
.path
) {
413 BT_COMP_LOGE_STR("Failed to allocate a GString.");
414 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
418 status
= handle_params(dmesg_comp
, params
);
419 if (status
!= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
) {
420 BT_COMP_LOGE("Invalid parameters: comp-addr=%p", self_comp
);
421 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
425 if (!dmesg_comp
->params
.read_from_stdin
&&
426 !g_file_test(dmesg_comp
->params
.path
->str
,
427 G_FILE_TEST_IS_REGULAR
)) {
428 BT_COMP_LOGE("Input path is not a regular file: "
429 "comp-addr=%p, path=\"%s\"", self_comp
,
430 dmesg_comp
->params
.path
->str
);
431 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
435 status
= create_port(self_comp_src
);
436 if (status
!= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
) {
440 bt_self_component_set_data(self_comp
, dmesg_comp
);
441 BT_COMP_LOGI_STR("Component initialized.");
443 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
;
447 destroy_dmesg_component(dmesg_comp
);
448 bt_self_component_set_data(self_comp
, NULL
);
455 void dmesg_finalize(bt_self_component_source
*self_comp
)
457 destroy_dmesg_component(bt_self_component_get_data(
458 bt_self_component_source_as_self_component(self_comp
)));
462 bt_message
*create_init_event_msg_from_line(
463 struct dmesg_msg_iter
*msg_iter
,
464 const char *line
, const char **new_start
)
467 bt_message
*msg
= NULL
;
468 bool has_timestamp
= false;
469 unsigned long sec
, usec
, msec
;
470 unsigned int year
, mon
, mday
, hour
, min
;
473 struct dmesg_component
*dmesg_comp
= msg_iter
->dmesg_comp
;
477 if (dmesg_comp
->params
.no_timestamp
) {
481 /* Extract time from input line */
482 if (sscanf(line
, "[%lu.%lu] ", &sec
, &usec
) == 2) {
483 ts
= (uint64_t) sec
* USEC_PER_SEC
+ (uint64_t) usec
;
486 * The clock class we use has a 1 GHz frequency: convert
490 has_timestamp
= true;
491 } else if (sscanf(line
, "[%u-%u-%u %u:%u:%lu.%lu] ",
492 &year
, &mon
, &mday
, &hour
, &min
,
497 memset(&ti
, 0, sizeof(ti
));
498 ti
.tm_year
= year
- 1900; /* From 1900 */
499 ti
.tm_mon
= mon
- 1; /* 0 to 11 */
505 ep_sec
= bt_timegm(&ti
);
506 if (ep_sec
!= (time_t) -1) {
507 ts
= (uint64_t) ep_sec
* NSEC_PER_SEC
508 + (uint64_t) msec
* NSEC_PER_MSEC
;
511 has_timestamp
= true;
515 /* Set new start for the message portion of the line */
516 *new_start
= strchr(line
, ']');
517 BT_ASSERT_DBG(*new_start
);
520 if ((*new_start
)[0] == ' ') {
527 * At this point, we know if the stream class's event header
528 * field class should have a timestamp or not, so we can lazily
529 * create the metadata and stream objects.
531 ret
= try_create_meta_stream(dmesg_comp
, has_timestamp
);
533 /* try_create_meta_stream() logs errors */
537 if (dmesg_comp
->clock_class
) {
538 msg
= bt_message_event_create_with_default_clock_snapshot(
539 msg_iter
->self_msg_iter
,
540 dmesg_comp
->event_class
, dmesg_comp
->stream
, ts
);
541 msg_iter
->last_clock_value
= ts
;
543 msg
= bt_message_event_create(msg_iter
->self_msg_iter
,
544 dmesg_comp
->event_class
, dmesg_comp
->stream
);
548 BT_COMP_LOGE_STR("Cannot create event message.");
552 event
= bt_message_event_borrow_event(msg
);
553 BT_ASSERT_DBG(event
);
557 BT_MESSAGE_PUT_REF_AND_RESET(msg
);
564 int fill_event_payload_from_line(struct dmesg_component
*dmesg_comp
,
565 const char *line
, bt_event
*event
)
567 bt_field
*ep_field
= NULL
;
568 bt_field
*str_field
= NULL
;
572 ep_field
= bt_event_borrow_payload_field(event
);
573 BT_ASSERT_DBG(ep_field
);
574 str_field
= bt_field_structure_borrow_member_field_by_index(
577 BT_COMP_LOGE_STR("Cannot borrow `timestamp` field from event payload structure field.");
582 if (line
[len
- 1] == '\n') {
583 /* Do not include the newline character in the payload */
587 bt_field_string_clear(str_field
);
588 ret
= bt_field_string_append_with_length(str_field
, line
, len
);
590 BT_COMP_LOGE("Cannot append value to string field object: "
605 bt_message
*create_msg_from_line(
606 struct dmesg_msg_iter
*dmesg_msg_iter
, const char *line
)
608 struct dmesg_component
*dmesg_comp
= dmesg_msg_iter
->dmesg_comp
;
609 bt_event
*event
= NULL
;
610 bt_message
*msg
= NULL
;
611 const char *new_start
;
614 msg
= create_init_event_msg_from_line(dmesg_msg_iter
,
617 BT_COMP_LOGE_STR("Cannot create and initialize event message from line.");
621 event
= bt_message_event_borrow_event(msg
);
622 BT_ASSERT_DBG(event
);
623 ret
= fill_event_payload_from_line(dmesg_comp
, new_start
, event
);
625 BT_COMP_LOGE("Cannot fill event payload field from line: "
633 BT_MESSAGE_PUT_REF_AND_RESET(msg
);
640 void destroy_dmesg_msg_iter(struct dmesg_msg_iter
*dmesg_msg_iter
)
642 struct dmesg_component
*dmesg_comp
;
644 if (!dmesg_msg_iter
) {
648 dmesg_comp
= dmesg_msg_iter
->dmesg_comp
;
650 if (dmesg_msg_iter
->fp
&& dmesg_msg_iter
->fp
!= stdin
) {
651 if (fclose(dmesg_msg_iter
->fp
)) {
652 BT_COMP_LOGE_ERRNO("Cannot close input file", ".");
656 bt_message_put_ref(dmesg_msg_iter
->tmp_event_msg
);
657 free(dmesg_msg_iter
->linebuf
);
658 g_free(dmesg_msg_iter
);
664 bt_component_class_message_iterator_initialize_method_status
dmesg_msg_iter_init(
665 bt_self_message_iterator
*self_msg_iter
,
666 bt_self_message_iterator_configuration
*config
,
667 bt_self_component_source
*self_comp
,
668 bt_self_component_port_output
*self_port
)
670 struct dmesg_component
*dmesg_comp
= bt_self_component_get_data(
671 bt_self_component_source_as_self_component(self_comp
));
672 struct dmesg_msg_iter
*dmesg_msg_iter
=
673 g_new0(struct dmesg_msg_iter
, 1);
674 bt_component_class_message_iterator_initialize_method_status status
=
675 BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK
;
677 if (!dmesg_msg_iter
) {
678 BT_COMP_LOGE_STR("Failed to allocate on dmesg message iterator structure.");
682 BT_ASSERT(dmesg_comp
);
683 dmesg_msg_iter
->dmesg_comp
= dmesg_comp
;
684 dmesg_msg_iter
->self_msg_iter
= self_msg_iter
;
686 if (dmesg_comp
->params
.read_from_stdin
) {
687 dmesg_msg_iter
->fp
= stdin
;
689 dmesg_msg_iter
->fp
= fopen(dmesg_comp
->params
.path
->str
, "r");
690 if (!dmesg_msg_iter
->fp
) {
691 BT_COMP_LOGE_ERRNO("Cannot open input file in read mode", ": path=\"%s\"",
692 dmesg_comp
->params
.path
->str
);
697 bt_self_message_iterator_set_data(self_msg_iter
,
702 destroy_dmesg_msg_iter(dmesg_msg_iter
);
703 bt_self_message_iterator_set_data(self_msg_iter
, NULL
);
705 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR
;
713 void dmesg_msg_iter_finalize(
714 bt_self_message_iterator
*priv_msg_iter
)
716 destroy_dmesg_msg_iter(bt_self_message_iterator_get_data(
721 bt_component_class_message_iterator_next_method_status
dmesg_msg_iter_next_one(
722 struct dmesg_msg_iter
*dmesg_msg_iter
,
726 struct dmesg_component
*dmesg_comp
;
727 bt_component_class_message_iterator_next_method_status status
=
728 BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK
;
730 BT_ASSERT_DBG(dmesg_msg_iter
);
731 dmesg_comp
= dmesg_msg_iter
->dmesg_comp
;
732 BT_ASSERT_DBG(dmesg_comp
);
734 if (dmesg_msg_iter
->state
== STATE_DONE
) {
735 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END
;
739 if (dmesg_msg_iter
->tmp_event_msg
||
740 dmesg_msg_iter
->state
== STATE_EMIT_STREAM_END
) {
746 bool only_spaces
= true;
748 len
= bt_getline(&dmesg_msg_iter
->linebuf
,
749 &dmesg_msg_iter
->linebuf_len
, dmesg_msg_iter
->fp
);
751 if (errno
== EINVAL
) {
752 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR
;
753 } else if (errno
== ENOMEM
) {
754 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR
;
756 if (dmesg_msg_iter
->state
== STATE_EMIT_STREAM_BEGINNING
) {
757 /* Stream did not even begin */
758 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END
;
762 dmesg_msg_iter
->state
=
763 STATE_EMIT_STREAM_END
;
771 BT_ASSERT_DBG(dmesg_msg_iter
->linebuf
);
773 /* Ignore empty lines, once trimmed */
774 for (ch
= dmesg_msg_iter
->linebuf
; *ch
!= '\0'; ch
++) {
786 dmesg_msg_iter
->tmp_event_msg
= create_msg_from_line(
787 dmesg_msg_iter
, dmesg_msg_iter
->linebuf
);
788 if (!dmesg_msg_iter
->tmp_event_msg
) {
789 BT_COMP_LOGE("Cannot create event message from line: "
790 "dmesg-comp-addr=%p, line=\"%s\"", dmesg_comp
,
791 dmesg_msg_iter
->linebuf
);
796 BT_ASSERT_DBG(dmesg_comp
->trace
);
798 switch (dmesg_msg_iter
->state
) {
799 case STATE_EMIT_STREAM_BEGINNING
:
800 BT_ASSERT_DBG(dmesg_msg_iter
->tmp_event_msg
);
801 *msg
= bt_message_stream_beginning_create(
802 dmesg_msg_iter
->self_msg_iter
, dmesg_comp
->stream
);
803 dmesg_msg_iter
->state
= STATE_EMIT_EVENT
;
805 case STATE_EMIT_EVENT
:
806 BT_ASSERT_DBG(dmesg_msg_iter
->tmp_event_msg
);
807 *msg
= dmesg_msg_iter
->tmp_event_msg
;
808 dmesg_msg_iter
->tmp_event_msg
= NULL
;
810 case STATE_EMIT_STREAM_END
:
811 *msg
= bt_message_stream_end_create(
812 dmesg_msg_iter
->self_msg_iter
, dmesg_comp
->stream
);
813 dmesg_msg_iter
->state
= STATE_DONE
;
820 BT_COMP_LOGE("Cannot create message: dmesg-comp-addr=%p",
822 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR
;
830 bt_component_class_message_iterator_next_method_status
dmesg_msg_iter_next(
831 bt_self_message_iterator
*self_msg_iter
,
832 bt_message_array_const msgs
, uint64_t capacity
,
835 struct dmesg_msg_iter
*dmesg_msg_iter
=
836 bt_self_message_iterator_get_data(
838 bt_component_class_message_iterator_next_method_status status
=
839 BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK
;
842 while (i
< capacity
&&
843 status
== BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK
) {
844 bt_message
*priv_msg
= NULL
;
846 status
= dmesg_msg_iter_next_one(dmesg_msg_iter
,
849 if (status
== BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK
) {
856 * Even if dmesg_msg_iter_next_one() returned
857 * something else than
858 * BT_SELF_MESSAGE_ITERATOR_STATUS_OK, we
859 * accumulated message objects in the output
860 * message array, so we need to return
861 * BT_SELF_MESSAGE_ITERATOR_STATUS_OK so that they
862 * are transfered to downstream. This other status
863 * occurs again the next time muxer_msg_iter_do_next()
864 * is called, possibly without any accumulated
865 * message, in which case we'll return it.
868 status
= BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK
;
875 bt_component_class_message_iterator_can_seek_beginning_method_status
876 dmesg_msg_iter_can_seek_beginning(
877 bt_self_message_iterator
*self_msg_iter
, bt_bool
*can_seek
)
879 struct dmesg_msg_iter
*dmesg_msg_iter
=
880 bt_self_message_iterator_get_data(self_msg_iter
);
882 /* Can't seek the beginning of the standard input stream */
883 *can_seek
= !dmesg_msg_iter
->dmesg_comp
->params
.read_from_stdin
;
885 return BT_COMPONENT_CLASS_MESSAGE_ITERATOR_CAN_SEEK_BEGINNING_METHOD_STATUS_OK
;
889 bt_component_class_message_iterator_seek_beginning_method_status
890 dmesg_msg_iter_seek_beginning(
891 bt_self_message_iterator
*self_msg_iter
)
893 struct dmesg_msg_iter
*dmesg_msg_iter
=
894 bt_self_message_iterator_get_data(self_msg_iter
);
896 BT_ASSERT(!dmesg_msg_iter
->dmesg_comp
->params
.read_from_stdin
);
898 BT_MESSAGE_PUT_REF_AND_RESET(dmesg_msg_iter
->tmp_event_msg
);
899 dmesg_msg_iter
->last_clock_value
= 0;
900 dmesg_msg_iter
->state
= STATE_EMIT_STREAM_BEGINNING
;
901 return BT_COMPONENT_CLASS_MESSAGE_ITERATOR_SEEK_BEGINNING_METHOD_STATUS_OK
;