/*
 * SPDX-FileCopyrightText: 2025 Eilertsens Kodeknekkeri
 * SPDX-FileCopyrightText: 2025 The FreeBSD Foundation
 * SPDX-FileContributor: Harald Eilertsen <haraldei@anduin.net>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#ifndef __PROCSTAT_CPU_TIME_HPP
#define __PROCSTAT_CPU_TIME_HPP

#include <pthread.h>

/**
 * Helper function to get the kernel thread id from a pthread_t handle.
 */
long ktid_from_pthread(pthread_t thread);

/**
 * Get the user and system runtime for a given thread by using libprocstat.
 *
 * Possibly slower than the fast_cpu_time method, as we have to iterate over the
 * thread info (kinfo_proc) structs for every thread in the process until we find
 * the correct one.
 *
 * Also the returned struct is dynamically allocated by the procstat_getprocs function,
 * and has to be freed by procstat_freeprocs after it's no longer needed.
 *
 * While this may be ok when retreiving the info for one struct, it would be way more
 * efficient to check multiple threads at once using the same returned array of structs.
 */
void procstat_cpu_time(pthread_t thread, struct timeval * utime, struct timeval * stime);

#endif