Fix: waiter: use std::reference_wrapper instead of a raw reference

[lttng-tools.git] / src / common / tracker.hpp

/*
 * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

#ifndef LTTNG_COMMON_TRACKER_H
#define LTTNG_COMMON_TRACKER_H

#include <common/buffer-view.hpp>
#include <common/dynamic-array.hpp>
#include <common/macros.hpp>
#include <common/sessiond-comm/sessiond-comm.hpp>

#include <lttng/lttng-error.h>
#include <lttng/tracker.h>

struct process_attr_value {
	enum lttng_process_attr_value_type type;
	union value {
		pid_t pid;
		uid_t uid;
		char *user_name;
		gid_t gid;
		char *group_name;
	} value;
};

struct lttng_process_attr_values {
	/* Array of struct process_attr_tracker_value. */
	struct lttng_dynamic_pointer_array array;
};

const char *lttng_process_attr_to_string(enum lttng_process_attr process_attr);

struct lttng_process_attr_values *lttng_process_attr_values_create();

/* Prefixed with '_' since the name conflicts with a public API. */
unsigned int _lttng_process_attr_values_get_count(const struct lttng_process_attr_values *values);

const struct process_attr_value *
lttng_process_attr_tracker_values_get_at_index(const struct lttng_process_attr_values *values,
					       unsigned int index);

int lttng_process_attr_values_serialize(const struct lttng_process_attr_values *values,
					struct lttng_dynamic_buffer *buffer);

ssize_t lttng_process_attr_values_create_from_buffer(enum lttng_domain_type domain,
						     enum lttng_process_attr process_attr,
						     const struct lttng_buffer_view *buffer_view,
						     struct lttng_process_attr_values **_values);

void lttng_process_attr_values_destroy(struct lttng_process_attr_values *values);

struct process_attr_value *process_attr_value_copy(const struct process_attr_value *value);

unsigned long process_attr_value_hash(const struct process_attr_value *a);

bool process_attr_tracker_value_equal(const struct process_attr_value *a,
				      const struct process_attr_value *b);

void process_attr_value_destroy(struct process_attr_value *value);

enum lttng_error_code
process_attr_value_from_comm(enum lttng_domain_type domain,
			     enum lttng_process_attr process_attr,
			     enum lttng_process_attr_value_type value_type,
			     const struct process_attr_integral_value_comm *integral_value,
			     const struct lttng_buffer_view *value_view,
			     struct process_attr_value **value);

#endif /* LTTNG_COMMON_TRACKER_H */