[babeltrace.git] / src / lib / trace-ir / trace-class.c

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
 * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 */

#define BT_LOG_TAG "LIB/TRACE-CLASS"
#include "lib/logging.h"

#include "lib/assert-pre.h"
#include "lib/assert-post.h"
#include <babeltrace2/trace-ir/trace-class.h>
#include <babeltrace2/trace-ir/event-class.h>
#include "ctf-writer/functor.h"
#include "ctf-writer/clock.h"
#include "compat/compiler.h"
#include <babeltrace2/value.h>
#include "lib/value.h"
#include <babeltrace2/types.h>
#include "compat/endian.h"
#include "common/assert.h"
#include "compat/glib.h"
#include <inttypes.h>
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>

#include "clock-class.h"
#include "event-class.h"
#include "event.h"
#include "field-class.h"
#include "field-wrapper.h"
#include "resolve-field-path.h"
#include "stream-class.h"
#include "stream.h"
#include "trace.h"
#include "utils.h"
#include "lib/value.h"
#include "lib/func-status.h"

struct bt_trace_class_destruction_listener_elem {
	bt_trace_class_destruction_listener_func func;
	void *data;
};

#define BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(_tc)				\
	BT_ASSERT_PRE_DEV_HOT((_tc), "Trace class", ": %!+T", (_tc))

static
void destroy_trace_class(struct bt_object *obj)
{
	struct bt_trace_class *tc = (void *) obj;

	BT_LIB_LOGD("Destroying trace class object: %!+T", tc);
	BT_OBJECT_PUT_REF_AND_RESET(tc->user_attributes);

	/*
	 * Call destruction listener functions so that everything else
	 * still exists in the trace class.
	 */
	if (tc->destruction_listeners) {
		uint64_t i;
		const struct bt_error *saved_error;

		BT_LIB_LOGD("Calling trace class destruction listener(s): %!+T", tc);

		/*
		* The trace class' reference count is 0 if we're here. Increment
		* it to avoid a double-destroy (possibly infinitely recursive).
		* This could happen for example if a destruction listener did
		* bt_object_get_ref() (or anything that causes
		* bt_object_get_ref() to be called) on the trace class (ref.
		* count goes from 0 to 1), and then bt_object_put_ref(): the
		* reference count would go from 1 to 0 again and this function
		* would be called again.
		*/
		tc->base.ref_count++;

		saved_error = bt_current_thread_take_error();

		/* Call all the trace class destruction listeners */
		for (i = 0; i < tc->destruction_listeners->len; i++) {
			struct bt_trace_class_destruction_listener_elem elem =
				g_array_index(tc->destruction_listeners,
						struct bt_trace_class_destruction_listener_elem, i);

			if (elem.func) {
				elem.func(tc, elem.data);
				BT_ASSERT_POST_NO_ERROR();
			}

			/*
			 * The destruction listener should not have kept a
			 * reference to the trace class.
			 */
			BT_ASSERT_POST(tc->base.ref_count == 1, "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", tc);
		}
		g_array_free(tc->destruction_listeners, TRUE);
		tc->destruction_listeners = NULL;

		if (saved_error) {
			BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(saved_error);
		}
	}

	if (tc->stream_classes) {
		BT_LOGD_STR("Destroying stream classes.");
		g_ptr_array_free(tc->stream_classes, TRUE);
		tc->stream_classes = NULL;
	}

	g_free(tc);
}

struct bt_trace_class *bt_trace_class_create(bt_self_component *self_comp)
{
	struct bt_trace_class *tc = NULL;

	BT_ASSERT_PRE_NO_ERROR();
	BT_ASSERT_PRE_NON_NULL(self_comp, "Self component");
	BT_LOGD_STR("Creating default trace class object.");
	tc = g_new0(struct bt_trace_class, 1);
	if (!tc) {
		BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace class.");
		goto error;
	}

	bt_object_init_shared_with_parent(&tc->base, destroy_trace_class);
	tc->user_attributes = bt_value_map_create();
	if (!tc->user_attributes) {
		BT_LIB_LOGE_APPEND_CAUSE(
			"Failed to create a map value object.");
		goto error;
	}

	tc->stream_classes = g_ptr_array_new_with_free_func(
		(GDestroyNotify) bt_object_try_spec_release);
	if (!tc->stream_classes) {
		BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray.");
		goto error;
	}

	tc->destruction_listeners = g_array_new(FALSE, TRUE,
		sizeof(struct bt_trace_class_destruction_listener_elem));
	if (!tc->destruction_listeners) {
		BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray.");
		goto error;
	}

	tc->assigns_automatic_stream_class_id = true;
	BT_LIB_LOGD("Created trace class object: %!+T", tc);
	goto end;

error:
	BT_OBJECT_PUT_REF_AND_RESET(tc);

end:
	return tc;
}

enum bt_trace_class_add_listener_status bt_trace_class_add_destruction_listener(
		const struct bt_trace_class *_tc,
		bt_trace_class_destruction_listener_func listener,
		void *data, bt_listener_id *listener_id)
{
	struct bt_trace_class *tc = (void *) _tc;
	uint64_t i;
	struct bt_trace_class_destruction_listener_elem new_elem = {
		.func = listener,
		.data = data,
	};

	BT_ASSERT_PRE_NO_ERROR();
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(listener, "Listener");

	/* Find the next available spot */
	for (i = 0; i < tc->destruction_listeners->len; i++) {
		struct bt_trace_class_destruction_listener_elem elem =
			g_array_index(tc->destruction_listeners,
				struct bt_trace_class_destruction_listener_elem, i);

		if (!elem.func) {
			break;
		}
	}

	if (i == tc->destruction_listeners->len) {
		g_array_append_val(tc->destruction_listeners, new_elem);
	} else {
		g_array_insert_val(tc->destruction_listeners, i, new_elem);
	}

	if (listener_id) {
		*listener_id = i;
	}

	BT_LIB_LOGD("Added trace class destruction listener: %![tc-]+T, "
			"listener-id=%" PRIu64, tc, i);
	return BT_FUNC_STATUS_OK;
}

static
bool has_listener_id(const struct bt_trace_class *tc, uint64_t listener_id)
{
	BT_ASSERT(listener_id < tc->destruction_listeners->len);
	return (&g_array_index(tc->destruction_listeners,
			struct bt_trace_class_destruction_listener_elem,
			listener_id))->func;
}

enum bt_trace_class_remove_listener_status bt_trace_class_remove_destruction_listener(
		const struct bt_trace_class *_tc, bt_listener_id listener_id)
{
	struct bt_trace_class *tc = (void *) _tc;
	struct bt_trace_class_destruction_listener_elem *elem;

	BT_ASSERT_PRE_NO_ERROR();
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE(has_listener_id(tc, listener_id),
		"Trace class has no such trace class destruction listener ID: "
		"%![tc-]+T, %" PRIu64, tc, listener_id);
	elem = &g_array_index(tc->destruction_listeners,
			struct bt_trace_class_destruction_listener_elem,
			listener_id);
	BT_ASSERT(elem->func);

	elem->func = NULL;
	elem->data = NULL;
	BT_LIB_LOGD("Removed trace class destruction listener: "
		"%![tc-]+T, listener-id=%" PRIu64,
		tc, listener_id);
	return BT_FUNC_STATUS_OK;
}

uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
	return (uint64_t) tc->stream_classes->len;
}

struct bt_stream_class *bt_trace_class_borrow_stream_class_by_index(
		struct bt_trace_class *tc, uint64_t index)
{
	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_DEV_VALID_INDEX(index, tc->stream_classes->len);
	return g_ptr_array_index(tc->stream_classes, index);
}

const struct bt_stream_class *
bt_trace_class_borrow_stream_class_by_index_const(
		const struct bt_trace_class *tc, uint64_t index)
{
	return bt_trace_class_borrow_stream_class_by_index(
		(void *) tc, index);
}

struct bt_stream_class *bt_trace_class_borrow_stream_class_by_id(
		struct bt_trace_class *tc, uint64_t id)
{
	struct bt_stream_class *stream_class = NULL;
	uint64_t i;

	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");

	for (i = 0; i < tc->stream_classes->len; i++) {
		struct bt_stream_class *stream_class_candidate =
			g_ptr_array_index(tc->stream_classes, i);

		if (stream_class_candidate->id == id) {
			stream_class = stream_class_candidate;
			goto end;
		}
	}

end:
	return stream_class;
}

const struct bt_stream_class *
bt_trace_class_borrow_stream_class_by_id_const(
		const struct bt_trace_class *tc, uint64_t id)
{
	return bt_trace_class_borrow_stream_class_by_id((void *) tc, id);
}

BT_HIDDEN
void _bt_trace_class_freeze(const struct bt_trace_class *tc)
{
	BT_ASSERT(tc);
	BT_LIB_LOGD("Freezing trace class: %!+T", tc);
	((struct bt_trace_class *) tc)->frozen = true;
}

bt_bool bt_trace_class_assigns_automatic_stream_class_id(const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
	return (bt_bool) tc->assigns_automatic_stream_class_id;
}

void bt_trace_class_set_assigns_automatic_stream_class_id(struct bt_trace_class *tc,
		bt_bool value)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(tc);
	tc->assigns_automatic_stream_class_id = (bool) value;
	BT_LIB_LOGD("Set trace class's automatic stream class ID "
		"assignment property: %!+T", tc);
}

const struct bt_value *bt_trace_class_borrow_user_attributes_const(
		const struct bt_trace_class *trace_class)
{
	BT_ASSERT_PRE_DEV_NON_NULL(trace_class, "Trace class");
	return trace_class->user_attributes;
}

struct bt_value *bt_trace_class_borrow_user_attributes(
		struct bt_trace_class *trace_class)
{
	return (void *) bt_trace_class_borrow_user_attributes_const(
		(void *) trace_class);
}

void bt_trace_class_set_user_attributes(struct bt_trace_class *trace_class,
		const struct bt_value *user_attributes)
{
	BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
	BT_ASSERT_PRE_NON_NULL(user_attributes, "User attributes");
	BT_ASSERT_PRE(user_attributes->type == BT_VALUE_TYPE_MAP,
		"User attributes object is not a map value object.");
	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(trace_class);
	bt_object_put_ref_no_null_check(trace_class->user_attributes);
	trace_class->user_attributes = (void *) user_attributes;
	bt_object_get_ref_no_null_check(trace_class->user_attributes);
}

void bt_trace_class_get_ref(const struct bt_trace_class *trace_class)
{
	bt_object_get_ref(trace_class);
}

void bt_trace_class_put_ref(const struct bt_trace_class *trace_class)
{
	bt_object_put_ref(trace_class);
}
Commit	Line	Data
862ca4ed	1	/*
0235b0db MJ	2	* SPDX-License-Identifier: MIT
0235b0db MJ	3	*
e2f7325d	4	* Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
862ca4ed	5	* Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
862ca4ed PP	6	*/
862ca4ed PP	7
a1a6f91b	8	#define BT_LOG_TAG "LIB/TRACE-CLASS"
c2d9d9cf	9	#include "lib/logging.h"
862ca4ed	10
578e048b	11	#include "lib/assert-pre.h"
3c634c85	12	#include "lib/assert-post.h"
3fadfbc0	13	#include <babeltrace2/trace-ir/trace-class.h>
3fadfbc0	14	#include <babeltrace2/trace-ir/event-class.h>
578e048b MJ	15	#include "ctf-writer/functor.h"
	16	#include "ctf-writer/clock.h"
	17	#include "compat/compiler.h"
3fadfbc0	18	#include <babeltrace2/value.h>
578e048b	19	#include "lib/value.h"
3fadfbc0	20	#include <babeltrace2/types.h>
578e048b MJ	21	#include "compat/endian.h"
	22	#include "common/assert.h"
	23	#include "compat/glib.h"
862ca4ed PP	24	#include <inttypes.h>
	25	#include <stdint.h>
	26	#include <string.h>
c4f23e30	27	#include <stdbool.h>
862ca4ed PP	28	#include <stdlib.h>
862ca4ed PP	29
578e048b MJ	30	#include "clock-class.h"
	31	#include "event-class.h"
	32	#include "event.h"
	33	#include "field-class.h"
	34	#include "field-wrapper.h"
	35	#include "resolve-field-path.h"
	36	#include "stream-class.h"
	37	#include "stream.h"
	38	#include "trace.h"
	39	#include "utils.h"
c6962c96	40	#include "lib/value.h"
d24d5663	41	#include "lib/func-status.h"
578e048b	42
ad5268b5 FD	43	struct bt_trace_class_destruction_listener_elem {
	44	bt_trace_class_destruction_listener_func func;
	45	void *data;
	46	};
	47
bdb288b3 PP	48	#define BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(_tc) \
bdb288b3 PP	49	BT_ASSERT_PRE_DEV_HOT((_tc), "Trace class", ": %!+T", (_tc))
862ca4ed PP	50
	51	static
	52	void destroy_trace_class(struct bt_object *obj)
	53	{
	54	struct bt_trace_class tc = (void ) obj;
	55
	56	BT_LIB_LOGD("Destroying trace class object: %!+T", tc);
c6962c96 PP	57	BT_OBJECT_PUT_REF_AND_RESET(tc->user_attributes);
c6962c96 PP	58
ad5268b5 FD	59	/*
	60	* Call destruction listener functions so that everything else
	61	* still exists in the trace class.
	62	*/
	63	if (tc->destruction_listeners) {
	64	uint64_t i;
42a63165 SM	65	const struct bt_error *saved_error;
42a63165 SM	66
3f7d4d90	67	BT_LIB_LOGD("Calling trace class destruction listener(s): %!+T", tc);
c47a6bec SM	68
	69	/*
	70	* The trace class' reference count is 0 if we're here. Increment
	71	* it to avoid a double-destroy (possibly infinitely recursive).
	72	* This could happen for example if a destruction listener did
	73	* bt_object_get_ref() (or anything that causes
	74	* bt_object_get_ref() to be called) on the trace class (ref.
	75	* count goes from 0 to 1), and then bt_object_put_ref(): the
	76	* reference count would go from 1 to 0 again and this function
	77	* would be called again.
	78	*/
	79	tc->base.ref_count++;
	80
42a63165 SM	81	saved_error = bt_current_thread_take_error();
42a63165 SM	82
ad5268b5 FD	83	/* Call all the trace class destruction listeners */
	84	for (i = 0; i < tc->destruction_listeners->len; i++) {
	85	struct bt_trace_class_destruction_listener_elem elem =
	86	g_array_index(tc->destruction_listeners,
	87	struct bt_trace_class_destruction_listener_elem, i);
	88
	89	if (elem.func) {
	90	elem.func(tc, elem.data);
6ecdcca3	91	BT_ASSERT_POST_NO_ERROR();
ad5268b5	92	}
c47a6bec SM	93
	94	/*
	95	* The destruction listener should not have kept a
	96	* reference to the trace class.
	97	*/
3c634c85	98	BT_ASSERT_POST(tc->base.ref_count == 1, "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", tc);
ad5268b5 FD	99	}
	100	g_array_free(tc->destruction_listeners, TRUE);
	101	tc->destruction_listeners = NULL;
42a63165 SM	102
	103	if (saved_error) {
	104	BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(saved_error);
	105	}
ad5268b5	106	}
862ca4ed	107
862ca4ed PP	108	if (tc->stream_classes) {
	109	BT_LOGD_STR("Destroying stream classes.");
	110	g_ptr_array_free(tc->stream_classes, TRUE);
	111	tc->stream_classes = NULL;
	112	}
	113
862ca4ed PP	114	g_free(tc);
	115	}
	116
41693723	117	struct bt_trace_class bt_trace_class_create(bt_self_component self_comp)
862ca4ed PP	118	{
862ca4ed PP	119	struct bt_trace_class *tc = NULL;
862ca4ed	120
17f3083a	121	BT_ASSERT_PRE_NO_ERROR();
41693723	122	BT_ASSERT_PRE_NON_NULL(self_comp, "Self component");
862ca4ed PP	123	BT_LOGD_STR("Creating default trace class object.");
	124	tc = g_new0(struct bt_trace_class, 1);
	125	if (!tc) {
870631a2	126	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace class.");
862ca4ed PP	127	goto error;
	128	}
	129
	130	bt_object_init_shared_with_parent(&tc->base, destroy_trace_class);
c6962c96 PP	131	tc->user_attributes = bt_value_map_create();
	132	if (!tc->user_attributes) {
	133	BT_LIB_LOGE_APPEND_CAUSE(
	134	"Failed to create a map value object.");
	135	goto error;
	136	}
862ca4ed PP	137
	138	tc->stream_classes = g_ptr_array_new_with_free_func(
	139	(GDestroyNotify) bt_object_try_spec_release);
	140	if (!tc->stream_classes) {
870631a2	141	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray.");
862ca4ed PP	142	goto error;
	143	}
	144
ad5268b5 FD	145	tc->destruction_listeners = g_array_new(FALSE, TRUE,
	146	sizeof(struct bt_trace_class_destruction_listener_elem));
	147	if (!tc->destruction_listeners) {
870631a2	148	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray.");
ad5268b5 FD	149	goto error;
	150	}
	151
862ca4ed	152	tc->assigns_automatic_stream_class_id = true;
862ca4ed PP	153	BT_LIB_LOGD("Created trace class object: %!+T", tc);
	154	goto end;
	155
	156	error:
	157	BT_OBJECT_PUT_REF_AND_RESET(tc);
	158
	159	end:
	160	return tc;
	161	}
	162
d24d5663	163	enum bt_trace_class_add_listener_status bt_trace_class_add_destruction_listener(
ad5268b5 FD	164	const struct bt_trace_class *_tc,
ad5268b5 FD	165	bt_trace_class_destruction_listener_func listener,
2054a0d1	166	void data, bt_listener_id listener_id)
ad5268b5 FD	167	{
	168	struct bt_trace_class tc = (void ) _tc;
	169	uint64_t i;
	170	struct bt_trace_class_destruction_listener_elem new_elem = {
	171	.func = listener,
	172	.data = data,
	173	};
	174
17f3083a	175	BT_ASSERT_PRE_NO_ERROR();
ad5268b5 FD	176	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	177	BT_ASSERT_PRE_NON_NULL(listener, "Listener");
	178
	179	/* Find the next available spot */
	180	for (i = 0; i < tc->destruction_listeners->len; i++) {
	181	struct bt_trace_class_destruction_listener_elem elem =
	182	g_array_index(tc->destruction_listeners,
	183	struct bt_trace_class_destruction_listener_elem, i);
	184
	185	if (!elem.func) {
	186	break;
	187	}
	188	}
	189
	190	if (i == tc->destruction_listeners->len) {
	191	g_array_append_val(tc->destruction_listeners, new_elem);
	192	} else {
	193	g_array_insert_val(tc->destruction_listeners, i, new_elem);
	194	}
	195
	196	if (listener_id) {
	197	*listener_id = i;
	198	}
	199
3f7d4d90	200	BT_LIB_LOGD("Added trace class destruction listener: %![tc-]+T, "
ad5268b5	201	"listener-id=%" PRIu64, tc, i);
d24d5663	202	return BT_FUNC_STATUS_OK;
ad5268b5 FD	203	}
ad5268b5 FD	204
ad5268b5 FD	205	static
	206	bool has_listener_id(const struct bt_trace_class *tc, uint64_t listener_id)
	207	{
	208	BT_ASSERT(listener_id < tc->destruction_listeners->len);
	209	return (&g_array_index(tc->destruction_listeners,
	210	struct bt_trace_class_destruction_listener_elem,
5084732e	211	listener_id))->func;
ad5268b5 FD	212	}
ad5268b5 FD	213
d24d5663	214	enum bt_trace_class_remove_listener_status bt_trace_class_remove_destruction_listener(
2054a0d1	215	const struct bt_trace_class *_tc, bt_listener_id listener_id)
ad5268b5 FD	216	{
	217	struct bt_trace_class tc = (void ) _tc;
	218	struct bt_trace_class_destruction_listener_elem *elem;
	219
17f3083a	220	BT_ASSERT_PRE_NO_ERROR();
ad5268b5 FD	221	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	222	BT_ASSERT_PRE(has_listener_id(tc, listener_id),
	223	"Trace class has no such trace class destruction listener ID: "
	224	"%![tc-]+T, %" PRIu64, tc, listener_id);
	225	elem = &g_array_index(tc->destruction_listeners,
	226	struct bt_trace_class_destruction_listener_elem,
	227	listener_id);
	228	BT_ASSERT(elem->func);
	229
	230	elem->func = NULL;
	231	elem->data = NULL;
3f7d4d90	232	BT_LIB_LOGD("Removed trace class destruction listener: "
ad5268b5 FD	233	"%![tc-]+T, listener-id=%" PRIu64,
ad5268b5 FD	234	tc, listener_id);
d24d5663	235	return BT_FUNC_STATUS_OK;
ad5268b5 FD	236	}
ad5268b5 FD	237
862ca4ed PP	238	uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc)
862ca4ed PP	239	{
bdb288b3	240	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	241	return (uint64_t) tc->stream_classes->len;
	242	}
	243
	244	struct bt_stream_class *bt_trace_class_borrow_stream_class_by_index(
	245	struct bt_trace_class *tc, uint64_t index)
	246	{
bdb288b3 PP	247	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
bdb288b3 PP	248	BT_ASSERT_PRE_DEV_VALID_INDEX(index, tc->stream_classes->len);
862ca4ed PP	249	return g_ptr_array_index(tc->stream_classes, index);
	250	}
	251
	252	const struct bt_stream_class *
	253	bt_trace_class_borrow_stream_class_by_index_const(
	254	const struct bt_trace_class *tc, uint64_t index)
	255	{
	256	return bt_trace_class_borrow_stream_class_by_index(
	257	(void *) tc, index);
	258	}
	259
	260	struct bt_stream_class *bt_trace_class_borrow_stream_class_by_id(
	261	struct bt_trace_class *tc, uint64_t id)
	262	{
	263	struct bt_stream_class *stream_class = NULL;
	264	uint64_t i;
	265
bdb288b3	266	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	267
	268	for (i = 0; i < tc->stream_classes->len; i++) {
	269	struct bt_stream_class *stream_class_candidate =
	270	g_ptr_array_index(tc->stream_classes, i);
	271
	272	if (stream_class_candidate->id == id) {
	273	stream_class = stream_class_candidate;
	274	goto end;
	275	}
	276	}
	277
	278	end:
	279	return stream_class;
	280	}
	281
	282	const struct bt_stream_class *
	283	bt_trace_class_borrow_stream_class_by_id_const(
	284	const struct bt_trace_class *tc, uint64_t id)
	285	{
	286	return bt_trace_class_borrow_stream_class_by_id((void *) tc, id);
	287	}
	288
862ca4ed PP	289	BT_HIDDEN
	290	void _bt_trace_class_freeze(const struct bt_trace_class *tc)
	291	{
862ca4ed PP	292	BT_ASSERT(tc);
	293	BT_LIB_LOGD("Freezing trace class: %!+T", tc);
	294	((struct bt_trace_class *) tc)->frozen = true;
	295	}
	296
	297	bt_bool bt_trace_class_assigns_automatic_stream_class_id(const struct bt_trace_class *tc)
	298	{
bdb288b3	299	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	300	return (bt_bool) tc->assigns_automatic_stream_class_id;
	301	}
	302
	303	void bt_trace_class_set_assigns_automatic_stream_class_id(struct bt_trace_class *tc,
	304	bt_bool value)
	305	{
	306	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
bdb288b3	307	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(tc);
862ca4ed	308	tc->assigns_automatic_stream_class_id = (bool) value;
3f7d4d90	309	BT_LIB_LOGD("Set trace class's automatic stream class ID "
862ca4ed PP	310	"assignment property: %!+T", tc);
862ca4ed PP	311	}
c5b9b441	312
c6962c96 PP	313	const struct bt_value *bt_trace_class_borrow_user_attributes_const(
	314	const struct bt_trace_class *trace_class)
	315	{
	316	BT_ASSERT_PRE_DEV_NON_NULL(trace_class, "Trace class");
	317	return trace_class->user_attributes;
	318	}
	319
	320	struct bt_value *bt_trace_class_borrow_user_attributes(
	321	struct bt_trace_class *trace_class)
	322	{
	323	return (void *) bt_trace_class_borrow_user_attributes_const(
	324	(void *) trace_class);
	325	}
	326
	327	void bt_trace_class_set_user_attributes(struct bt_trace_class *trace_class,
	328	const struct bt_value *user_attributes)
	329	{
	330	BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
	331	BT_ASSERT_PRE_NON_NULL(user_attributes, "User attributes");
	332	BT_ASSERT_PRE(user_attributes->type == BT_VALUE_TYPE_MAP,
	333	"User attributes object is not a map value object.");
	334	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(trace_class);
6871026b	335	bt_object_put_ref_no_null_check(trace_class->user_attributes);
c6962c96	336	trace_class->user_attributes = (void *) user_attributes;
6871026b	337	bt_object_get_ref_no_null_check(trace_class->user_attributes);
c6962c96 PP	338	}
c6962c96 PP	339
c5b9b441 PP	340	void bt_trace_class_get_ref(const struct bt_trace_class *trace_class)
	341	{
	342	bt_object_get_ref(trace_class);
	343	}
	344
	345	void bt_trace_class_put_ref(const struct bt_trace_class *trace_class)
	346	{
	347	bt_object_put_ref(trace_class);
	348	}