+++ /dev/null
-/*
- * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
- * Copyright (C) 2010 Steven Barth <steven@midlink.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 <sys/time.h>
-#include <sys/types.h>
-#include <sys/epoll.h>
-
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <poll.h>
-#include <string.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdbool.h>
-
-#include "uloop.h"
-
-/**
- * FIXME: uClibc < 0.9.30.3 does not define EPOLLRDHUP for Linux >= 2.6.17
- */
-#ifndef EPOLLRDHUP
-#define EPOLLRDHUP 0x2000
-#endif
-
-#ifndef ARRAY_SIZE
-#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
-#endif
-
-struct uloop_timeout *first_timeout;
-static int epoll_fd;
-static bool cancel;
-
-int uloop_fd_add(struct uloop_fd *sock, unsigned int flags)
-{
- struct epoll_event ev;
- int op = sock->registered ? EPOLL_CTL_MOD : EPOLL_CTL_ADD;
- unsigned int fl;
- int ret;
-
- fl = fcntl(sock->fd, F_GETFL, 0);
- fl |= O_NONBLOCK;
- fcntl(sock->fd, F_SETFL, fl);
-
- memset(&ev, 0, sizeof(struct epoll_event));
-
- if (flags & ULOOP_READ)
- ev.events |= EPOLLIN | EPOLLRDHUP;
-
- if (flags & ULOOP_WRITE)
- ev.events |= EPOLLOUT;
-
- if (flags & ULOOP_EDGE_TRIGGER)
- ev.events |= EPOLLET;
-
- ev.data.fd = sock->fd;
- ev.data.ptr = sock;
-
- ret = epoll_ctl(epoll_fd, op, sock->fd, &ev);
- if (ret < 0)
- goto out;
-
- sock->registered = true;
- sock->eof = false;
-
-out:
- return ret;
-}
-
-int uloop_fd_delete(struct uloop_fd *sock)
-{
- sock->registered = false;
- return epoll_ctl(epoll_fd, EPOLL_CTL_DEL, sock->fd, 0);
-}
-
-static int tv_diff(struct timeval *t1, struct timeval *t2)
-{
- if (t1->tv_sec != t2->tv_sec)
- return (t1->tv_sec - t2->tv_sec) * 1000;
- else
- return (t1->tv_usec - t2->tv_usec) / 1000;
-}
-
-int uloop_timeout_add(struct uloop_timeout *timeout)
-{
- struct uloop_timeout **head = &first_timeout;
- struct uloop_timeout *prev = NULL;
-
- if (timeout->pending)
- return -1;
-
- while (*head) {
- if (tv_diff(&(*head)->time, &timeout->time) > 0)
- break;
-
- prev = *head;
- head = &(*head)->next;
- }
-
- timeout->prev = prev;
- timeout->next = *head;
- if (timeout->next)
- timeout->next->prev = timeout;
- *head = timeout;
- timeout->pending = true;
-
- return 0;
-}
-
-int uloop_timeout_set(struct uloop_timeout *timeout, int msecs)
-{
- struct timeval *time = &timeout->time;
-
- if (timeout->pending)
- uloop_timeout_cancel(timeout);
-
- gettimeofday(&timeout->time, NULL);
-
- time->tv_sec += msecs / 1000;
- time->tv_usec += msecs % 1000;
-
- if (time->tv_usec > 1000000) {
- time->tv_sec++;
- time->tv_usec %= 100000;
- }
-
- return uloop_timeout_add(timeout);
-}
-
-int uloop_timeout_cancel(struct uloop_timeout *timeout)
-{
- if (!timeout->pending)
- return -1;
-
- if (timeout->prev)
- timeout->prev->next = timeout->next;
- else
- first_timeout = timeout->next;
-
- if (timeout->next)
- timeout->next->prev = timeout->prev;
-
- timeout->pending = false;
-
- return 0;
-}
-
-static void uloop_handle_sigint(int signo)
-{
- cancel = true;
-}
-
-static void uloop_setup_signals(void)
-{
- struct sigaction s;
- memset(&s, 0, sizeof(struct sigaction));
- s.sa_handler = uloop_handle_sigint;
- s.sa_flags = 0;
- sigaction(SIGINT, &s, NULL);
-}
-
-static int uloop_get_next_timeout(struct timeval *tv)
-{
- int diff;
-
- if (!first_timeout)
- return -1;
-
- diff = tv_diff(&first_timeout->time, tv);
- if (diff < 0)
- return 0;
-
- return diff;
-}
-
-static void uloop_process_timeouts(struct timeval *tv)
-{
- struct uloop_timeout *timeout;
-
- while (first_timeout) {
- if (tv_diff(&first_timeout->time, tv) > 0)
- break;
-
- timeout = first_timeout;
- uloop_timeout_cancel(timeout);
- if (timeout->cb)
- timeout->cb(timeout);
- }
-}
-
-void uloop_end(void)
-{
- cancel = true;
-}
-
-int uloop_init(void)
-{
- epoll_fd = epoll_create(32);
- if (epoll_fd < 0)
- return -1;
-
- fcntl(epoll_fd, F_SETFD, fcntl(epoll_fd, F_GETFD) | FD_CLOEXEC);
- return 0;
-}
-
-void uloop_run(void)
-{
- struct epoll_event events[10];
- struct timeval tv;
- int timeout;
- int nfds, n;
-
- uloop_setup_signals();
- while(!cancel)
- {
- gettimeofday(&tv, NULL);
- uloop_process_timeouts(&tv);
- timeout = uloop_get_next_timeout(&tv);
- nfds = epoll_wait(epoll_fd, events, ARRAY_SIZE(events), timeout);
- for(n = 0; n < nfds; ++n)
- {
- struct uloop_fd *u = events[n].data.ptr;
- unsigned int ev = 0;
-
- if(events[n].events & EPOLLERR) {
- u->error = true;
- uloop_fd_delete(u);
- }
-
- if(!(events[n].events & (EPOLLRDHUP|EPOLLIN|EPOLLOUT|EPOLLERR)))
- continue;
-
- if(events[n].events & EPOLLRDHUP)
- u->eof = true;
-
- if(events[n].events & EPOLLIN)
- ev |= ULOOP_READ;
-
- if(events[n].events & EPOLLOUT)
- ev |= ULOOP_WRITE;
-
- if(u->cb)
- u->cb(u, ev);
- }
- }
-}
-
-void uloop_done(void)
-{
- close(epoll_fd);
-}
projects / project / relayd.git / blobdiff