sortix-mirror/libc/errno/errno.c

/*
 * Copyright (c) 2011, 2012, 2014 Jonas 'Sortie' Termansen.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * errno/errno.c
 * Value storing a numeric value representing the last occured error.
 */

#include <errno.h>
#include <stddef.h>

#ifndef __is_sortix_libk

__thread int errno = 0;

#else

int global_errno = 0;
errno_location_func_t errno_location_func = NULL;

int* get_errno_location(void)
{
	if ( errno_location_func )
		return errno_location_func();
	return &global_errno;
}

void set_errno_location_func(errno_location_func_t func)
{
	errno_location_func = func;
}

#endif