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author | Kay Sievers <kay@vrfy.org> | 2012-04-12 14:40:20 +0200 |
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committer | Kay Sievers <kay@vrfy.org> | 2012-04-12 15:11:39 +0200 |
commit | 3bdf9c1d0a241eff2d17591854172725682b27cd (patch) | |
tree | 011a0df32e60b56e9c6a39ca95cade52e7a4cb5e /src/dbus-loop.c | |
parent | detect-virt: print 'none' if no virtualization is detected (diff) | |
download | systemd-3bdf9c1d0a241eff2d17591854172725682b27cd.tar.xz systemd-3bdf9c1d0a241eff2d17591854172725682b27cd.zip |
move remainig shared stuff to shared/
Diffstat (limited to 'src/dbus-loop.c')
-rw-r--r-- | src/dbus-loop.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/src/dbus-loop.c b/src/dbus-loop.c deleted file mode 100644 index da0a00443a..0000000000 --- a/src/dbus-loop.c +++ /dev/null @@ -1,263 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2011 Lennart Poettering - - systemd 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 2.1 of the License, or - (at your option) any later version. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <stdbool.h> -#include <assert.h> -#include <sys/epoll.h> -#include <string.h> -#include <errno.h> -#include <sys/timerfd.h> -#include <unistd.h> - -#include "dbus-loop.h" -#include "dbus-common.h" -#include "util.h" - -/* Minimal implementation of the dbus loop which integrates all dbus - * events into a single epoll fd which we can triviall integrate with - * other loops. Note that this is not used in the main systemd daemon - * since we run a more elaborate mainloop there. */ - -typedef struct EpollData { - int fd; - void *object; - bool is_timeout:1; - bool fd_is_dupped:1; -} EpollData; - -static dbus_bool_t add_watch(DBusWatch *watch, void *data) { - EpollData *e; - struct epoll_event ev; - - assert(watch); - - e = new0(EpollData, 1); - if (!e) - return FALSE; - - e->fd = dbus_watch_get_unix_fd(watch); - e->object = watch; - e->is_timeout = false; - - zero(ev); - ev.events = bus_flags_to_events(watch); - ev.data.ptr = e; - - if (epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_ADD, e->fd, &ev) < 0) { - - if (errno != EEXIST) { - free(e); - return FALSE; - } - - /* Hmm, bloody D-Bus creates multiple watches on the - * same fd. epoll() does not like that. As a dirty - * hack we simply dup() the fd and hence get a second - * one we can safely add to the epoll(). */ - - e->fd = dup(e->fd); - if (e->fd < 0) { - free(e); - return FALSE; - } - - if (epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_ADD, e->fd, &ev) < 0) { - close_nointr_nofail(e->fd); - free(e); - return FALSE; - } - - e->fd_is_dupped = true; - } - - dbus_watch_set_data(watch, e, NULL); - - return TRUE; -} - -static void remove_watch(DBusWatch *watch, void *data) { - EpollData *e; - - assert(watch); - - e = dbus_watch_get_data(watch); - if (!e) - return; - - assert_se(epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_DEL, e->fd, NULL) >= 0); - - if (e->fd_is_dupped) - close_nointr_nofail(e->fd); - - free(e); -} - -static void toggle_watch(DBusWatch *watch, void *data) { - EpollData *e; - struct epoll_event ev; - - assert(watch); - - e = dbus_watch_get_data(watch); - if (!e) - return; - - zero(ev); - ev.events = bus_flags_to_events(watch); - ev.data.ptr = e; - - assert_se(epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_MOD, e->fd, &ev) == 0); -} - -static int timeout_arm(EpollData *e) { - struct itimerspec its; - - assert(e); - assert(e->is_timeout); - - zero(its); - - if (dbus_timeout_get_enabled(e->object)) { - timespec_store(&its.it_value, dbus_timeout_get_interval(e->object) * USEC_PER_MSEC); - its.it_interval = its.it_value; - } - - if (timerfd_settime(e->fd, 0, &its, NULL) < 0) - return -errno; - - return 0; -} - -static dbus_bool_t add_timeout(DBusTimeout *timeout, void *data) { - EpollData *e; - struct epoll_event ev; - - assert(timeout); - - e = new0(EpollData, 1); - if (!e) - return FALSE; - - e->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC); - if (e->fd < 0) - goto fail; - - e->object = timeout; - e->is_timeout = true; - - if (timeout_arm(e) < 0) - goto fail; - - zero(ev); - ev.events = EPOLLIN; - ev.data.ptr = e; - - if (epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_ADD, e->fd, &ev) < 0) - goto fail; - - dbus_timeout_set_data(timeout, e, NULL); - - return TRUE; - -fail: - if (e->fd >= 0) - close_nointr_nofail(e->fd); - - free(e); - return FALSE; -} - -static void remove_timeout(DBusTimeout *timeout, void *data) { - EpollData *e; - - assert(timeout); - - e = dbus_timeout_get_data(timeout); - if (!e) - return; - - assert_se(epoll_ctl(PTR_TO_INT(data), EPOLL_CTL_DEL, e->fd, NULL) >= 0); - close_nointr_nofail(e->fd); - free(e); -} - -static void toggle_timeout(DBusTimeout *timeout, void *data) { - EpollData *e; - int r; - - assert(timeout); - - e = dbus_timeout_get_data(timeout); - if (!e) - return; - - r = timeout_arm(e); - if (r < 0) - log_error("Failed to rearm timer: %s", strerror(-r)); -} - -int bus_loop_open(DBusConnection *c) { - int fd; - - assert(c); - - fd = epoll_create1(EPOLL_CLOEXEC); - if (fd < 0) - return -errno; - - if (!dbus_connection_set_watch_functions(c, add_watch, remove_watch, toggle_watch, INT_TO_PTR(fd), NULL) || - !dbus_connection_set_timeout_functions(c, add_timeout, remove_timeout, toggle_timeout, INT_TO_PTR(fd), NULL)) { - close_nointr_nofail(fd); - return -ENOMEM; - } - - return fd; -} - -int bus_loop_dispatch(int fd) { - int n; - struct epoll_event event; - EpollData *d; - - assert(fd >= 0); - - zero(event); - - n = epoll_wait(fd, &event, 1, 0); - if (n < 0) - return errno == EAGAIN || errno == EINTR ? 0 : -errno; - - assert_se(d = event.data.ptr); - - if (d->is_timeout) { - DBusTimeout *t = d->object; - - if (dbus_timeout_get_enabled(t)) - dbus_timeout_handle(t); - } else { - DBusWatch *w = d->object; - - if (dbus_watch_get_enabled(w)) - dbus_watch_handle(w, bus_events_to_flags(event.events)); - } - - return 0; -} |