[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-cond.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
d98421f2	11	#include "lib/assert-cond.h"
3fadfbc0	12	#include <babeltrace2/trace-ir/trace-class.h>
3fadfbc0	13	#include <babeltrace2/trace-ir/event-class.h>
578e048b MJ	14	#include "ctf-writer/functor.h"
	15	#include "ctf-writer/clock.h"
	16	#include "compat/compiler.h"
3fadfbc0	17	#include <babeltrace2/value.h>
578e048b	18	#include "lib/value.h"
3fadfbc0	19	#include <babeltrace2/types.h>
578e048b MJ	20	#include "compat/endian.h"
	21	#include "common/assert.h"
	22	#include "compat/glib.h"
862ca4ed PP	23	#include <inttypes.h>
	24	#include <stdint.h>
	25	#include <string.h>
c4f23e30	26	#include <stdbool.h>
862ca4ed PP	27	#include <stdlib.h>
862ca4ed PP	28
578e048b MJ	29	#include "clock-class.h"
	30	#include "event-class.h"
	31	#include "event.h"
	32	#include "field-class.h"
	33	#include "field-wrapper.h"
	34	#include "resolve-field-path.h"
	35	#include "stream-class.h"
	36	#include "stream.h"
	37	#include "trace.h"
	38	#include "utils.h"
c6962c96	39	#include "lib/value.h"
d24d5663	40	#include "lib/func-status.h"
578e048b	41
ad5268b5 FD	42	struct bt_trace_class_destruction_listener_elem {
	43	bt_trace_class_destruction_listener_func func;
	44	void *data;
	45	};
	46
bdb288b3 PP	47	#define BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(_tc) \
bdb288b3 PP	48	BT_ASSERT_PRE_DEV_HOT((_tc), "Trace class", ": %!+T", (_tc))
862ca4ed PP	49
	50	static
	51	void destroy_trace_class(struct bt_object *obj)
	52	{
	53	struct bt_trace_class tc = (void ) obj;
	54
	55	BT_LIB_LOGD("Destroying trace class object: %!+T", tc);
c6962c96 PP	56	BT_OBJECT_PUT_REF_AND_RESET(tc->user_attributes);
c6962c96 PP	57
ad5268b5 FD	58	/*
	59	* Call destruction listener functions so that everything else
	60	* still exists in the trace class.
	61	*/
	62	if (tc->destruction_listeners) {
	63	uint64_t i;
42a63165 SM	64	const struct bt_error *saved_error;
42a63165 SM	65
3f7d4d90	66	BT_LIB_LOGD("Calling trace class destruction listener(s): %!+T", tc);
c47a6bec SM	67
	68	/*
	69	* The trace class' reference count is 0 if we're here. Increment
	70	* it to avoid a double-destroy (possibly infinitely recursive).
	71	* This could happen for example if a destruction listener did
	72	* bt_object_get_ref() (or anything that causes
	73	* bt_object_get_ref() to be called) on the trace class (ref.
	74	* count goes from 0 to 1), and then bt_object_put_ref(): the
	75	* reference count would go from 1 to 0 again and this function
	76	* would be called again.
	77	*/
	78	tc->base.ref_count++;
	79
42a63165 SM	80	saved_error = bt_current_thread_take_error();
42a63165 SM	81
ad5268b5 FD	82	/* Call all the trace class destruction listeners */
	83	for (i = 0; i < tc->destruction_listeners->len; i++) {
	84	struct bt_trace_class_destruction_listener_elem elem =
	85	g_array_index(tc->destruction_listeners,
	86	struct bt_trace_class_destruction_listener_elem, i);
	87
	88	if (elem.func) {
	89	elem.func(tc, elem.data);
6ecdcca3	90	BT_ASSERT_POST_NO_ERROR();
ad5268b5	91	}
c47a6bec SM	92
	93	/*
	94	* The destruction listener should not have kept a
	95	* reference to the trace class.
	96	*/
3c634c85	97	BT_ASSERT_POST(tc->base.ref_count == 1, "Destruction listener kept a reference to the trace class being destroyed: %![tc-]+T", tc);
ad5268b5 FD	98	}
	99	g_array_free(tc->destruction_listeners, TRUE);
	100	tc->destruction_listeners = NULL;
42a63165 SM	101
	102	if (saved_error) {
	103	BT_CURRENT_THREAD_MOVE_ERROR_AND_RESET(saved_error);
	104	}
ad5268b5	105	}
862ca4ed	106
862ca4ed PP	107	if (tc->stream_classes) {
	108	BT_LOGD_STR("Destroying stream classes.");
	109	g_ptr_array_free(tc->stream_classes, TRUE);
	110	tc->stream_classes = NULL;
	111	}
	112
862ca4ed PP	113	g_free(tc);
	114	}
	115
41693723	116	struct bt_trace_class bt_trace_class_create(bt_self_component self_comp)
862ca4ed PP	117	{
862ca4ed PP	118	struct bt_trace_class *tc = NULL;
862ca4ed	119
17f3083a	120	BT_ASSERT_PRE_NO_ERROR();
41693723	121	BT_ASSERT_PRE_NON_NULL(self_comp, "Self component");
862ca4ed PP	122	BT_LOGD_STR("Creating default trace class object.");
	123	tc = g_new0(struct bt_trace_class, 1);
	124	if (!tc) {
870631a2	125	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one trace class.");
862ca4ed PP	126	goto error;
	127	}
	128
	129	bt_object_init_shared_with_parent(&tc->base, destroy_trace_class);
c6962c96 PP	130	tc->user_attributes = bt_value_map_create();
	131	if (!tc->user_attributes) {
	132	BT_LIB_LOGE_APPEND_CAUSE(
	133	"Failed to create a map value object.");
	134	goto error;
	135	}
862ca4ed PP	136
	137	tc->stream_classes = g_ptr_array_new_with_free_func(
	138	(GDestroyNotify) bt_object_try_spec_release);
	139	if (!tc->stream_classes) {
870631a2	140	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GPtrArray.");
862ca4ed PP	141	goto error;
	142	}
	143
ad5268b5 FD	144	tc->destruction_listeners = g_array_new(FALSE, TRUE,
	145	sizeof(struct bt_trace_class_destruction_listener_elem));
	146	if (!tc->destruction_listeners) {
870631a2	147	BT_LIB_LOGE_APPEND_CAUSE("Failed to allocate one GArray.");
ad5268b5 FD	148	goto error;
	149	}
	150
862ca4ed	151	tc->assigns_automatic_stream_class_id = true;
862ca4ed PP	152	BT_LIB_LOGD("Created trace class object: %!+T", tc);
	153	goto end;
	154
	155	error:
	156	BT_OBJECT_PUT_REF_AND_RESET(tc);
	157
	158	end:
	159	return tc;
	160	}
	161
d24d5663	162	enum bt_trace_class_add_listener_status bt_trace_class_add_destruction_listener(
ad5268b5 FD	163	const struct bt_trace_class *_tc,
ad5268b5 FD	164	bt_trace_class_destruction_listener_func listener,
2054a0d1	165	void data, bt_listener_id listener_id)
ad5268b5 FD	166	{
	167	struct bt_trace_class tc = (void ) _tc;
	168	uint64_t i;
	169	struct bt_trace_class_destruction_listener_elem new_elem = {
	170	.func = listener,
	171	.data = data,
	172	};
	173
17f3083a	174	BT_ASSERT_PRE_NO_ERROR();
ad5268b5 FD	175	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	176	BT_ASSERT_PRE_NON_NULL(listener, "Listener");
	177
	178	/* Find the next available spot */
	179	for (i = 0; i < tc->destruction_listeners->len; i++) {
	180	struct bt_trace_class_destruction_listener_elem elem =
	181	g_array_index(tc->destruction_listeners,
	182	struct bt_trace_class_destruction_listener_elem, i);
	183
	184	if (!elem.func) {
	185	break;
	186	}
	187	}
	188
	189	if (i == tc->destruction_listeners->len) {
	190	g_array_append_val(tc->destruction_listeners, new_elem);
	191	} else {
	192	g_array_insert_val(tc->destruction_listeners, i, new_elem);
	193	}
	194
	195	if (listener_id) {
	196	*listener_id = i;
	197	}
	198
3f7d4d90	199	BT_LIB_LOGD("Added trace class destruction listener: %![tc-]+T, "
ad5268b5	200	"listener-id=%" PRIu64, tc, i);
d24d5663	201	return BT_FUNC_STATUS_OK;
ad5268b5 FD	202	}
ad5268b5 FD	203
ad5268b5 FD	204	static
	205	bool has_listener_id(const struct bt_trace_class *tc, uint64_t listener_id)
	206	{
	207	BT_ASSERT(listener_id < tc->destruction_listeners->len);
	208	return (&g_array_index(tc->destruction_listeners,
	209	struct bt_trace_class_destruction_listener_elem,
5084732e	210	listener_id))->func;
ad5268b5 FD	211	}
ad5268b5 FD	212
d24d5663	213	enum bt_trace_class_remove_listener_status bt_trace_class_remove_destruction_listener(
2054a0d1	214	const struct bt_trace_class *_tc, bt_listener_id listener_id)
ad5268b5 FD	215	{
	216	struct bt_trace_class tc = (void ) _tc;
	217	struct bt_trace_class_destruction_listener_elem *elem;
	218
17f3083a	219	BT_ASSERT_PRE_NO_ERROR();
ad5268b5 FD	220	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	221	BT_ASSERT_PRE(has_listener_id(tc, listener_id),
	222	"Trace class has no such trace class destruction listener ID: "
	223	"%![tc-]+T, %" PRIu64, tc, listener_id);
	224	elem = &g_array_index(tc->destruction_listeners,
	225	struct bt_trace_class_destruction_listener_elem,
	226	listener_id);
	227	BT_ASSERT(elem->func);
	228
	229	elem->func = NULL;
	230	elem->data = NULL;
3f7d4d90	231	BT_LIB_LOGD("Removed trace class destruction listener: "
ad5268b5 FD	232	"%![tc-]+T, listener-id=%" PRIu64,
ad5268b5 FD	233	tc, listener_id);
d24d5663	234	return BT_FUNC_STATUS_OK;
ad5268b5 FD	235	}
ad5268b5 FD	236
862ca4ed PP	237	uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc)
862ca4ed PP	238	{
bdb288b3	239	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	240	return (uint64_t) tc->stream_classes->len;
	241	}
	242
	243	struct bt_stream_class *bt_trace_class_borrow_stream_class_by_index(
	244	struct bt_trace_class *tc, uint64_t index)
	245	{
bdb288b3 PP	246	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
bdb288b3 PP	247	BT_ASSERT_PRE_DEV_VALID_INDEX(index, tc->stream_classes->len);
862ca4ed PP	248	return g_ptr_array_index(tc->stream_classes, index);
	249	}
	250
	251	const struct bt_stream_class *
	252	bt_trace_class_borrow_stream_class_by_index_const(
	253	const struct bt_trace_class *tc, uint64_t index)
	254	{
	255	return bt_trace_class_borrow_stream_class_by_index(
	256	(void *) tc, index);
	257	}
	258
	259	struct bt_stream_class *bt_trace_class_borrow_stream_class_by_id(
	260	struct bt_trace_class *tc, uint64_t id)
	261	{
	262	struct bt_stream_class *stream_class = NULL;
	263	uint64_t i;
	264
bdb288b3	265	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	266
	267	for (i = 0; i < tc->stream_classes->len; i++) {
	268	struct bt_stream_class *stream_class_candidate =
	269	g_ptr_array_index(tc->stream_classes, i);
	270
	271	if (stream_class_candidate->id == id) {
	272	stream_class = stream_class_candidate;
	273	goto end;
	274	}
	275	}
	276
	277	end:
	278	return stream_class;
	279	}
	280
	281	const struct bt_stream_class *
	282	bt_trace_class_borrow_stream_class_by_id_const(
	283	const struct bt_trace_class *tc, uint64_t id)
	284	{
	285	return bt_trace_class_borrow_stream_class_by_id((void *) tc, id);
	286	}
	287
862ca4ed PP	288	BT_HIDDEN
	289	void _bt_trace_class_freeze(const struct bt_trace_class *tc)
	290	{
862ca4ed PP	291	BT_ASSERT(tc);
	292	BT_LIB_LOGD("Freezing trace class: %!+T", tc);
	293	((struct bt_trace_class *) tc)->frozen = true;
	294	}
	295
	296	bt_bool bt_trace_class_assigns_automatic_stream_class_id(const struct bt_trace_class *tc)
	297	{
bdb288b3	298	BT_ASSERT_PRE_DEV_NON_NULL(tc, "Trace class");
862ca4ed PP	299	return (bt_bool) tc->assigns_automatic_stream_class_id;
	300	}
	301
	302	void bt_trace_class_set_assigns_automatic_stream_class_id(struct bt_trace_class *tc,
	303	bt_bool value)
	304	{
	305	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
bdb288b3	306	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(tc);
862ca4ed	307	tc->assigns_automatic_stream_class_id = (bool) value;
3f7d4d90	308	BT_LIB_LOGD("Set trace class's automatic stream class ID "
862ca4ed PP	309	"assignment property: %!+T", tc);
862ca4ed PP	310	}
c5b9b441	311
c6962c96 PP	312	const struct bt_value *bt_trace_class_borrow_user_attributes_const(
	313	const struct bt_trace_class *trace_class)
	314	{
	315	BT_ASSERT_PRE_DEV_NON_NULL(trace_class, "Trace class");
	316	return trace_class->user_attributes;
	317	}
	318
	319	struct bt_value *bt_trace_class_borrow_user_attributes(
	320	struct bt_trace_class *trace_class)
	321	{
	322	return (void *) bt_trace_class_borrow_user_attributes_const(
	323	(void *) trace_class);
	324	}
	325
	326	void bt_trace_class_set_user_attributes(struct bt_trace_class *trace_class,
	327	const struct bt_value *user_attributes)
	328	{
	329	BT_ASSERT_PRE_NON_NULL(trace_class, "Trace class");
	330	BT_ASSERT_PRE_NON_NULL(user_attributes, "User attributes");
	331	BT_ASSERT_PRE(user_attributes->type == BT_VALUE_TYPE_MAP,
	332	"User attributes object is not a map value object.");
	333	BT_ASSERT_PRE_DEV_TRACE_CLASS_HOT(trace_class);
6871026b	334	bt_object_put_ref_no_null_check(trace_class->user_attributes);
c6962c96	335	trace_class->user_attributes = (void *) user_attributes;
6871026b	336	bt_object_get_ref_no_null_check(trace_class->user_attributes);
c6962c96 PP	337	}
c6962c96 PP	338
c5b9b441 PP	339	void bt_trace_class_get_ref(const struct bt_trace_class *trace_class)
	340	{
	341	bt_object_get_ref(trace_class);
	342	}
	343
	344	void bt_trace_class_put_ref(const struct bt_trace_class *trace_class)
	345	{
	346	bt_object_put_ref(trace_class);
	347	}