/*
 * Copyright © 2024 Nick Bowler
 *
 * Helpers for hosts using standard C threading API.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <threads.h>

static tss_t tls_key;
static bool tls_key_valid;

static void init_once_cb(void);

static void *tls_get(void)
{
	return tss_get(tls_key);
}

static int tls_set(void *p)
{
	return tss_set(tls_key, p) == thrd_success;
}

static void init_once_with_tls(void)
{
	tls_key_valid = (tss_create(&tls_key, free) == thrd_success);
	init_once_cb();
}

static int init_once(void)
{
	static once_flag flag;

	call_once(&flag, init_once_with_tls);
	return 1;
}