/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * This project's homepage is: http://www.musicpd.org * * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "ioops.h" #include <assert.h> #include <stddef.h> /* Eventually the listener protocol will use this, too */ /* * functions and variables in this file are only used by a single thread and * thus do not need to be thread-safe */ /* List of registered external IO handlers */ static struct ioOps *ioList; /* Add fds for all registered IO handlers */ void registered_IO_add_fds(int *fdmax, fd_set * rfds, fd_set * wfds, fd_set * efds) { struct ioOps *o = ioList; while (o) { struct ioOps *current = o; int fdnum; assert(current->fdset); fdnum = current->fdset(rfds, wfds, efds); if (*fdmax < fdnum) *fdmax = fdnum; o = o->next; } } /* Consume fds for all registered IO handlers */ void registered_IO_consume_fds(int *selret, fd_set * rfds, fd_set * wfds, fd_set * efds) { struct ioOps *o = ioList; while (o) { struct ioOps *current = o; assert(current->consume); *selret = current->consume(*selret, rfds, wfds, efds); o = o->next; } } void registerIO(struct ioOps *ops) { assert(ops != NULL); ops->next = ioList; ioList = ops; ops->prev = NULL; if (ops->next) ops->next->prev = ops; } void deregisterIO(struct ioOps *ops) { assert(ops != NULL); if (ioList == ops) ioList = ops->next; else if (ops->prev != NULL) ops->prev->next = ops->next; }