sortix--sortix/libc/dirent/dunregister.cpp

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

    Copyright(C) Jonas 'Sortie' Termansen 2011, 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/>.

    dirent/dunregister.cpp
    Unregisters an directory stream for later automatic closing.

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

#include <dirent.h>
#include <pthread.h>

extern "C" void dunregister(DIR* dir)
{
	if ( !(dir->flags & _DIR_REGISTERED) )
		return;
	pthread_mutex_lock(&__first_dir_lock);
	if ( !dir->prev )
		__first_dir = dir->next;
	if ( dir->prev )
		dir->prev->next = dir->next;
	if ( dir->next )
		dir->next->prev = dir->prev;
	dir->flags &= ~_DIR_REGISTERED;
	pthread_mutex_unlock(&__first_dir_lock);
}