sortix--sortix/libc/semaphore/sem_init.c

/*******************************************************************************

    Copyright(C) Jonas 'Sortie' Termansen 2014.

    This file is part of the Sortix C Library.

    The Sortix C Library is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or (at your
    option) any later version.

    The Sortix C Library 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 Lesser General Public
    License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.

    semaphore/sem_init.c
    Initialize a semaphore.

*******************************************************************************/

#include <errno.h>
#include <limits.h>
#include <semaphore.h>

int sem_init(sem_t* sem, int pshared, unsigned int value)
{
	if ( pshared )
		return errno = ENOSYS, -1;

	if ( (unsigned int) INT_MAX < value )
		return errno = EINVAL, -1;

	sem->value = (int) value;

	return 0;
}