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/*
* Event Loop
*
* Copyright (c) 2011-2012 David Herrmann <dh.herrmann@googlemail.com>
* Copyright (c) 2011 University of Tuebingen
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* Event Loop
* This provides a basic event loop similar to those provided by glib etc.
* It uses linux specific features like signalfd so it may not be easy to port
* it to other platforms.
*/
#ifndef EV_ELOOP_H
#define EV_ELOOP_H
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/signalfd.h>
#include <time.h>
struct ev_eloop;
struct ev_fd;
struct ev_timer;
struct ev_counter;
typedef void (*ev_fd_cb) (struct ev_fd *fd, int mask, void *data);
typedef void (*ev_timer_cb)
(struct ev_timer *timer, uint64_t num, void *data);
typedef void (*ev_counter_cb)
(struct ev_counter *cnt, uint64_t num, void *data);
typedef void (*ev_signal_shared_cb)
(struct ev_eloop *eloop, struct signalfd_siginfo *info, void *data);
typedef void (*ev_idle_cb) (struct ev_eloop *eloop, void *unused, void *data);
enum ev_eloop_flags {
EV_READABLE = 0x01,
EV_WRITEABLE = 0x02,
EV_HUP = 0x04,
EV_ERR = 0x08,
};
int ev_eloop_new(struct ev_eloop **out);
void ev_eloop_ref(struct ev_eloop *loop);
void ev_eloop_unref(struct ev_eloop *loop);
void ev_eloop_flush_fd(struct ev_eloop *loop, struct ev_fd *fd);
int ev_eloop_dispatch(struct ev_eloop *loop, int timeout);
int ev_eloop_run(struct ev_eloop *loop, int timeout);
void ev_eloop_exit(struct ev_eloop *loop);
/* eloop sources */
int ev_eloop_new_eloop(struct ev_eloop *loop, struct ev_eloop **out);
int ev_eloop_add_eloop(struct ev_eloop *loop, struct ev_eloop *add);
void ev_eloop_rm_eloop(struct ev_eloop *rm);
/* fd sources */
int ev_fd_new(struct ev_fd **out, int fd, int mask, ev_fd_cb cb, void *data);
void ev_fd_ref(struct ev_fd *fd);
void ev_fd_unref(struct ev_fd *fd);
int ev_fd_enable(struct ev_fd *fd);
void ev_fd_disable(struct ev_fd *fd);
bool ev_fd_is_enabled(struct ev_fd *fd);
bool ev_fd_is_bound(struct ev_fd *fd);
void ev_fd_set_cb_data(struct ev_fd *fd, ev_fd_cb cb, void *data);
int ev_fd_update(struct ev_fd *fd, int mask);
int ev_eloop_new_fd(struct ev_eloop *loop, struct ev_fd **out, int rfd,
int mask, ev_fd_cb cb, void *data);
int ev_eloop_add_fd(struct ev_eloop *loop, struct ev_fd *fd);
void ev_eloop_rm_fd(struct ev_fd *fd);
/* timer sources */
int ev_timer_new(struct ev_timer **out, const struct itimerspec *spec,
ev_timer_cb cb, void *data);
void ev_timer_ref(struct ev_timer *timer);
void ev_timer_unref(struct ev_timer *timer);
bool ev_timer_is_bound(struct ev_timer *timer);
void ev_timer_set_cb_data(struct ev_timer *timer, ev_timer_cb cb, void *data);
int ev_timer_update(struct ev_timer *timer, const struct itimerspec *spec);
int ev_eloop_new_timer(struct ev_eloop *loop, struct ev_timer **out,
const struct itimerspec *spec, ev_timer_cb cb,
void *data);
int ev_eloop_add_timer(struct ev_eloop *loop, struct ev_timer *timer);
void ev_eloop_rm_timer(struct ev_timer *timer);
/* counter sources */
int ev_counter_new(struct ev_counter **out, ev_counter_cb, void *data);
void ev_counter_ref(struct ev_counter *cnt);
void ev_counter_unref(struct ev_counter *cnt);
bool ev_counter_is_bound(struct ev_counter *cnt);
void ev_counter_set_cb_data(struct ev_counter *cnt, ev_counter_cb cb,
void *data);
int ev_counter_inc(struct ev_counter *cnt, uint64_t val);
int ev_eloop_new_counter(struct ev_eloop *eloop, struct ev_counter **out,
ev_counter_cb cb, void *data);
int ev_eloop_add_counter(struct ev_eloop *eloop, struct ev_counter *cnt);
void ev_eloop_rm_counter(struct ev_counter *cnt);
/* signal sources */
int ev_eloop_register_signal_cb(struct ev_eloop *loop, int signum,
ev_signal_shared_cb cb, void *data);
void ev_eloop_unregister_signal_cb(struct ev_eloop *loop, int signum,
ev_signal_shared_cb cb, void *data);
/* idle sources */
int ev_eloop_register_idle_cb(struct ev_eloop *eloop, ev_idle_cb cb,
void *data);
void ev_eloop_unregister_idle_cb(struct ev_eloop *eloop, ev_idle_cb cb,
void *data);
#endif /* EV_ELOOP_H */
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