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

#include "fast_cpu_time.hpp"
#include "helpers.hpp"
#include <cassert>

namespace {
	clockid_t get_thread_clock_id(pthread_t thread) {
		clockid_t clock_id;

		auto rc = pthread_getcpuclockid(thread, &clock_id);
		assert(rc == 0);

		return clock_id;
	}
}

unsigned long fast_thread_cpu_time(pthread_t thread) {
	auto clock_id = get_thread_clock_id(thread);

	struct timespec time;
	auto rc = clock_gettime(clock_id, &time);
	assert(rc == 0);

	return time.tv_sec * 1000000 + time.tv_nsec;
}