threads.c

/* SPDX-License-Identifier: BSD-3-Clause */
/*
 * Copyright (c) 2019, NEC Laboratories Europe GmbH, NEC Corporation.
 *                     All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <uk/arch/limits.h>
#include <uk/sched.h>
#include <uk/thread.h>
#include <uk/print.h>
#include <uk/assert.h>
#include <lwip/sys.h>
#include <uk/essentials.h>

/**
 * Starts a new thread with priority "prio" that will begin its execution in the
 * function "thread()". The "arg" argument will be passed as an argument to the
 * thread() function. The id of the new thread is returned. Both the id and
 * the priority are system dependent.
 */
sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg,
			    int stacksize, int prio __unused)
{
	struct uk_sched *s = uk_sched_current();
	struct uk_thread *t;

	UK_ASSERT(s);

	t = uk_sched_thread_create_fn1(s,
				       (uk_thread_fn1_t) thread, arg,
				       (size_t) stacksize, 0,
				       false,
				       false,
				       name,
				       NULL, NULL);
	if (!t) {
		uk_pr_err("Failed to create lwIP thread '%s'\n", name);
		return NULL;
	}
	return t;
}