126 lines
5.1 KiB
C
126 lines
5.1 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foosdeventhfoo
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#define foosdeventhfoo
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/types.h>
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#include <sys/signalfd.h>
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#include <sys/epoll.h>
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#include <inttypes.h>
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#include <signal.h>
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#include "_sd-common.h"
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/*
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Why is this better than pure epoll?
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- Supports event source priorisation
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- Scales better with a large number of time events, since it doesn't require one timerfd each
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- Automatically tries to coalesce timer events system-wide
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- Handles signals and child PIDs
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*/
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_SD_BEGIN_DECLARATIONS;
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typedef struct sd_event sd_event;
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typedef struct sd_event_source sd_event_source;
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enum {
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SD_EVENT_OFF = 0,
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SD_EVENT_ON = 1,
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SD_EVENT_ONESHOT = -1
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};
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enum {
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SD_EVENT_PASSIVE,
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SD_EVENT_RUNNING,
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SD_EVENT_EXITING,
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SD_EVENT_FINISHED
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};
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enum {
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/* And everything inbetween and outside is good too */
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SD_EVENT_PRIORITY_IMPORTANT = -100,
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SD_EVENT_PRIORITY_NORMAL = 0,
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SD_EVENT_PRIORITY_IDLE = 100
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};
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typedef int (*sd_event_handler_t)(sd_event_source *s, void *userdata);
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typedef int (*sd_event_io_handler_t)(sd_event_source *s, int fd, uint32_t revents, void *userdata);
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typedef int (*sd_event_time_handler_t)(sd_event_source *s, uint64_t usec, void *userdata);
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typedef int (*sd_event_signal_handler_t)(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata);
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typedef int (*sd_event_child_handler_t)(sd_event_source *s, const siginfo_t *si, void *userdata);
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int sd_event_default(sd_event **e);
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int sd_event_new(sd_event **e);
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sd_event* sd_event_ref(sd_event *e);
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sd_event* sd_event_unref(sd_event *e);
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int sd_event_add_io(sd_event *e, sd_event_source **s, int fd, uint32_t events, sd_event_io_handler_t callback, void *userdata);
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int sd_event_add_monotonic(sd_event *e, sd_event_source **s, uint64_t usec, uint64_t accuracy, sd_event_time_handler_t callback, void *userdata);
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int sd_event_add_realtime(sd_event *e, sd_event_source **s, uint64_t usec, uint64_t accuracy, sd_event_time_handler_t callback, void *userdata);
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int sd_event_add_signal(sd_event *e, sd_event_source **s, int sig, sd_event_signal_handler_t callback, void *userdata);
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int sd_event_add_child(sd_event *e, sd_event_source **s, pid_t pid, int options, sd_event_child_handler_t callback, void *userdata);
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int sd_event_add_defer(sd_event *e, sd_event_source **s, sd_event_handler_t callback, void *userdata);
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int sd_event_add_exit(sd_event *e, sd_event_source **s, sd_event_handler_t callback, void *userdata);
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int sd_event_run(sd_event *e, uint64_t timeout);
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int sd_event_loop(sd_event *e);
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int sd_event_exit(sd_event *e, int code);
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int sd_event_get_state(sd_event *e);
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int sd_event_get_tid(sd_event *e, pid_t *tid);
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int sd_event_get_exit_code(sd_event *e, int *code);
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int sd_event_get_now_realtime(sd_event *e, uint64_t *usec);
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int sd_event_get_now_monotonic(sd_event *e, uint64_t *usec);
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int sd_event_set_watchdog(sd_event *e, int b);
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int sd_event_get_watchdog(sd_event *e);
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sd_event_source* sd_event_source_ref(sd_event_source *s);
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sd_event_source* sd_event_source_unref(sd_event_source *s);
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int sd_event_source_set_prepare(sd_event_source *s, sd_event_handler_t callback);
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int sd_event_source_get_pending(sd_event_source *s);
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int sd_event_source_get_priority(sd_event_source *s, int64_t *priority);
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int sd_event_source_set_priority(sd_event_source *s, int64_t priority);
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int sd_event_source_get_enabled(sd_event_source *s, int *enabled);
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int sd_event_source_set_enabled(sd_event_source *s, int enabled);
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void* sd_event_source_get_userdata(sd_event_source *s);
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void* sd_event_source_set_userdata(sd_event_source *s, void *userdata);
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int sd_event_source_get_io_fd(sd_event_source *s);
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int sd_event_source_set_io_fd(sd_event_source *s, int fd);
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int sd_event_source_get_io_events(sd_event_source *s, uint32_t* events);
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int sd_event_source_set_io_events(sd_event_source *s, uint32_t events);
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int sd_event_source_get_io_revents(sd_event_source *s, uint32_t* revents);
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int sd_event_source_get_time(sd_event_source *s, uint64_t *usec);
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int sd_event_source_set_time(sd_event_source *s, uint64_t usec);
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int sd_event_source_set_time_accuracy(sd_event_source *s, uint64_t usec);
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int sd_event_source_get_time_accuracy(sd_event_source *s, uint64_t *usec);
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int sd_event_source_get_signal(sd_event_source *s);
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int sd_event_source_get_child_pid(sd_event_source *s, pid_t *pid);
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sd_event *sd_event_source_get_event(sd_event_source *s);
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_SD_END_DECLARATIONS;
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#endif
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