Stream class API: use status

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

/*
 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
 * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#define BT_LOG_TAG "TRACE"
#include <babeltrace/lib-logging-internal.h>

#include <babeltrace/assert-pre-internal.h>
#include <babeltrace/trace-ir/trace-class.h>
#include <babeltrace/trace-ir/trace-class-const.h>
#include <babeltrace/trace-ir/trace-internal.h>
#include <babeltrace/trace-ir/clock-class-internal.h>
#include <babeltrace/trace-ir/stream-internal.h>
#include <babeltrace/trace-ir/stream-class-internal.h>
#include <babeltrace/trace-ir/event-internal.h>
#include <babeltrace/trace-ir/event-class.h>
#include <babeltrace/trace-ir/event-class-internal.h>
#include <babeltrace/ctf-writer/functor-internal.h>
#include <babeltrace/ctf-writer/clock-internal.h>
#include <babeltrace/trace-ir/field-wrapper-internal.h>
#include <babeltrace/trace-ir/field-class-internal.h>
#include <babeltrace/trace-ir/attributes-internal.h>
#include <babeltrace/trace-ir/utils-internal.h>
#include <babeltrace/trace-ir/resolve-field-path-internal.h>
#include <babeltrace/compiler-internal.h>
#include <babeltrace/value.h>
#include <babeltrace/value-const.h>
#include <babeltrace/value-internal.h>
#include <babeltrace/types.h>
#include <babeltrace/endian-internal.h>
#include <babeltrace/assert-internal.h>
#include <babeltrace/compat/glib-internal.h>
#include <inttypes.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>

#define BT_ASSERT_PRE_TRACE_CLASS_HOT(_tc)				\
	BT_ASSERT_PRE_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_pool_finalize(&tc->packet_header_field_pool);

	if (tc->environment) {
		BT_LOGD_STR("Destroying environment attributes.");
		bt_attributes_destroy(tc->environment);
		tc->environment = NULL;
	}

	if (tc->name.str) {
		g_string_free(tc->name.str, TRUE);
		tc->name.str = NULL;
		tc->name.value = NULL;
	}

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

	BT_LOGD_STR("Putting packet header field class.");
	bt_object_put_ref(tc->packet_header_fc);
	tc->packet_header_fc = NULL;
	g_free(tc);
}

static
void free_packet_header_field(struct bt_field_wrapper *field_wrapper,
		struct bt_trace_class *tc)
{
	bt_field_wrapper_destroy(field_wrapper);
}

struct bt_trace_class *bt_trace_class_create(void)
{
	struct bt_trace_class *tc = NULL;
	int ret;

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

	bt_object_init_shared_with_parent(&tc->base, destroy_trace_class);

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

	tc->name.str = g_string_new(NULL);
	if (!tc->name.str) {
		BT_LOGE_STR("Failed to allocate one GString.");
		goto error;
	}

	tc->environment = bt_attributes_create();
	if (!tc->environment) {
		BT_LOGE_STR("Cannot create empty attributes object.");
		goto error;
	}

	tc->assigns_automatic_stream_class_id = true;
	ret = bt_object_pool_initialize(&tc->packet_header_field_pool,
		(bt_object_pool_new_object_func) bt_field_wrapper_new,
		(bt_object_pool_destroy_object_func) free_packet_header_field,
		tc);
	if (ret) {
		BT_LOGE("Failed to initialize packet header field pool: ret=%d",
			ret);
		goto error;
	}

	BT_LIB_LOGD("Created trace class object: %!+T", tc);
	goto end;

error:
	BT_OBJECT_PUT_REF_AND_RESET(tc);

end:
	return tc;
}

const char *bt_trace_class_get_name(const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	return tc->name.value;
}

int bt_trace_class_set_name(struct bt_trace_class *tc, const char *name)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(name, "Name");
	BT_ASSERT_PRE_TRACE_CLASS_HOT(tc);
	g_string_assign(tc->name.str, name);
	tc->name.value = tc->name.str->str;
	BT_LIB_LOGV("Set trace class's name: %!+T", tc);
	return 0;
}

bt_uuid bt_trace_class_get_uuid(const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	return tc->uuid.value;
}

void bt_trace_class_set_uuid(struct bt_trace_class *tc, bt_uuid uuid)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(uuid, "UUID");
	BT_ASSERT_PRE_TRACE_CLASS_HOT(tc);
	memcpy(tc->uuid.uuid, uuid, BABELTRACE_UUID_LEN);
	tc->uuid.value = tc->uuid.uuid;
	BT_LIB_LOGV("Set trace class's UUID: %!+T", tc);
}

BT_ASSERT_FUNC
static
bool trace_has_environment_entry(const struct bt_trace_class *tc, const char *name)
{
	BT_ASSERT(tc);

	return bt_attributes_borrow_field_value_by_name(
		tc->environment, name) != NULL;
}

static
int set_environment_entry(struct bt_trace_class *tc, const char *name,
		struct bt_value *value)
{
	int ret;

	BT_ASSERT(tc);
	BT_ASSERT(name);
	BT_ASSERT(value);
	BT_ASSERT_PRE(!tc->frozen ||
		!trace_has_environment_entry(tc, name),
		"Trace class is frozen: cannot replace environment entry: "
		"%![tc-]+T, entry-name=\"%s\"", tc, name);
	ret = bt_attributes_set_field_value(tc->environment, name,
		value);
	bt_value_freeze(value);
	if (ret) {
		BT_LIB_LOGE("Cannot set trace class's environment entry: "
			"%![tc-]+T, entry-name=\"%s\"", tc, name);
	} else {
		BT_LIB_LOGV("Set trace class's environment entry: "
			"%![tc-]+T, entry-name=\"%s\"", tc, name);
	}

	return ret;
}

int bt_trace_class_set_environment_entry_string(
		struct bt_trace_class *tc, const char *name, const char *value)
{
	int ret;
	struct bt_value *value_obj;
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(name, "Name");
	BT_ASSERT_PRE_NON_NULL(value, "Value");
	value_obj = bt_value_string_create_init(value);
	if (!value_obj) {
		BT_LOGE_STR("Cannot create a string value object.");
		ret = -1;
		goto end;
	}

	/* set_environment_entry() logs errors */
	ret = set_environment_entry(tc, name, value_obj);

end:
	bt_object_put_ref(value_obj);
	return ret;
}

int bt_trace_class_set_environment_entry_integer(struct bt_trace_class *tc,
		const char *name, int64_t value)
{
	int ret;
	struct bt_value *value_obj;
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(name, "Name");
	value_obj = bt_value_integer_create_init(value);
	if (!value_obj) {
		BT_LOGE_STR("Cannot create an integer value object.");
		ret = -1;
		goto end;
	}

	/* set_environment_entry() logs errors */
	ret = set_environment_entry(tc, name, value_obj);

end:
	bt_object_put_ref(value_obj);
	return ret;
}

uint64_t bt_trace_class_get_environment_entry_count(const struct bt_trace_class *tc)
{
	int64_t ret;

	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	ret = bt_attributes_get_count(tc->environment);
	BT_ASSERT(ret >= 0);
	return (uint64_t) ret;
}

void bt_trace_class_borrow_environment_entry_by_index_const(
		const struct bt_trace_class *tc, uint64_t index,
		const char **name, const struct bt_value **value)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(name, "Name");
	BT_ASSERT_PRE_NON_NULL(value, "Value");
	BT_ASSERT_PRE_VALID_INDEX(index,
		bt_attributes_get_count(tc->environment));
	*value = bt_attributes_borrow_field_value(tc->environment, index);
	BT_ASSERT(*value);
	*name = bt_attributes_get_field_name(tc->environment, index);
	BT_ASSERT(*name);
}

const struct bt_value *bt_trace_class_borrow_environment_entry_value_by_name_const(
		const struct bt_trace_class *tc, const char *name)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(name, "Name");
	return bt_attributes_borrow_field_value_by_name(tc->environment,
		name);
}

uint64_t bt_trace_class_get_stream_class_count(const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_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_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_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_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);
}

const struct bt_field_class *bt_trace_class_borrow_packet_header_field_class_const(
		const struct bt_trace_class *tc)
{
	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	return tc->packet_header_fc;
}

int bt_trace_class_set_packet_header_field_class(
		struct bt_trace_class *tc,
		struct bt_field_class *field_class)
{
	int ret;
	struct bt_resolve_field_path_context resolve_ctx = {
		.packet_header = field_class,
		.packet_context = NULL,
		.event_header = NULL,
		.event_common_context = NULL,
		.event_specific_context = NULL,
		.event_payload = NULL,
	};

	BT_ASSERT_PRE_NON_NULL(tc, "Trace class");
	BT_ASSERT_PRE_NON_NULL(field_class, "Field class");
	BT_ASSERT_PRE_TRACE_CLASS_HOT(tc);
	BT_ASSERT_PRE(bt_field_class_get_type(field_class) ==
		BT_FIELD_CLASS_TYPE_STRUCTURE,
		"Packet header field class is not a structure field class: %!+F",
		field_class);
	ret = bt_resolve_field_paths(field_class, &resolve_ctx);
	if (ret) {
		goto end;
	}

	bt_field_class_make_part_of_trace_class(field_class);
	bt_object_put_ref(tc->packet_header_fc);
	tc->packet_header_fc = field_class;
	bt_object_get_no_null_check(tc->packet_header_fc);
	bt_field_class_freeze(field_class);
	BT_LIB_LOGV("Set trace class's packet header field class: %!+T", tc);

end:
	return ret;
}

BT_HIDDEN
void _bt_trace_class_freeze(const struct bt_trace_class *tc)
{
	/* The packet header field class is already frozen */
	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_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_TRACE_CLASS_HOT(tc);
	tc->assigns_automatic_stream_class_id = (bool) value;
	BT_LIB_LOGV("Set trace class's automatic stream class ID "
		"assignment property: %!+T", tc);
}

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);
}