--- /dev/null
+/*
+ fd_epoll.c -- I/O and event multiplexing using epoll
+
+ Copyright (C) 2003-2004 Guus Sliepen <guus@tinc-vpn.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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: fd.c 1375 2004-03-22 12:30:39Z guus $
+*/
+
+#include "system.h"
+
+#include "support/avl.h"
+#include "support/xalloc.h"
+#include "fd/event.h"
+#include "fd/fd.h"
+
+static int epollfd;
+static avl_tree_t *fds;
+
+volatile bool fd_running = false;
+
+int fd_compare(struct fd *a, struct fd *b) {
+ return (a->fd - b->fd) ?: (a->mode - b->mode);
+};
+
+bool fd_init(void) {
+ int i;
+
+ epollfd = epoll_create(32);
+
+ if(epollfd == -1) {
+ logger(LOG_ERR, "fd: could not open an epoll file descriptor: %s", strerror(errno));
+ return false;
+ }
+
+ fds = avl_tree_new((avl_compare_t)fd_compare, NULL);
+
+ event_init();
+}
+
+bool fd_exit(void) {
+ event_exit();
+
+ avl_tree_del(fds);
+
+ close(epollfd);
+}
+
+bool fd_add(struct fd *fd) {
+ if(!avl_add(fds, fd))
+ return false;
+
+ fd->event.events = 0;
+
+ if(fd->read)
+ fd->event.events |= EPOLLIN;
+
+ if(fd->write)
+ fd->event.events |= EPOLLOUT;
+
+ if(fd->error)
+ fd->event.events |= EPOLLPRI | EPOLLERR | EPOLLHUP;
+
+ fd->event.data.ptr = fd;
+
+ if(epoll_ctl(epollfd, EPOLL_CTL_ADD, fd->fd, &fd->event) == -1) {
+ logger(LOG_ERR, "fd: failed to add file descriptor: %s", strerror(errno));
+ return false;
+ }
+
+ return true;
+};
+
+bool fd_del(struct fd *fd) {
+ if(epoll_ctl(epollfd, EPOLL_CTL_DEL, fd->fd, &fd->event) == -1) {
+ logger(LOG_ERR, "fd: failed to delete file descriptor: %s", strerror(errno));
+ return false;
+ }
+
+ return avl_del(fds, fd);
+};
+
+bool fd_mod(struct fd *fd) {
+ fd->event.events = 0;
+
+ if(fd->read)
+ fd->event.events |= EPOLLIN;
+
+ if(fd->write)
+ fd->event.events |= EPOLLOUT;
+
+ if(fd->error)
+ fd->event.events |= EPOLLPRI | EPOLLERR | EPOLLHUP;
+
+ if(epoll_ctl(epollfd, EPOLL_CTL_MOD, fd->fd, &fd->event) == -1) {
+ logger(LOG_ERR, "fd: failed to modify file descriptor: %s", strerror(errno));
+ return false;
+ }
+
+ return true;
+}
+
+bool fd_run(void) {
+ struct timeval tv;
+ int result;
+ struct epoll_event *events[10];
+
+ fd_running = true;
+
+ logger(LOG_INFO, "fd: running");
+
+ while(fd_running) {
+ tv = event_timeout();
+
+ result = epoll_wait(epollfd, events, sizeof events / sizeof *events, tv.tv_sec >= 0 ? tv.tv_sec * 1000 + tv.tv_usec / 1000: -1);
+
+ if(result < 0) {
+ if(errno != EINTR && errno != EAGAIN) {
+ logger(LOG_ERR, _("fd: error while waiting for input: %s"), strerror(errno));
+ return false;
+ }
+
+ continue;
+ }
+
+ if(result) {
+ struct fd *fd;
+
+ while(result--) {
+ fd = events[result].data.ptr;
+
+ if(events[result].events & EPOLLIN)
+ fd->read(fd);
+
+ if(events[result].events & EPOLLOUT)
+ fd->write(fd);
+
+ if(events[result].events & (EPOLLPRI | EPOLLERR | EPOLLHUP))
+ fd->error(fd);
+ }
+ } else {
+ event_handle();
+ }
+ }
+
+ logger(LOG_INFO, "fd: stopping");
+
+ return true;
+}
+
+void fd_stop(void) {
+ fd_running = false;
+}