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/*
* Copyright (c) 2014, Vsevolod Stakhov
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RDNS_EV_H_
#define RDNS_EV_H_
#include "contrib/libev/ev.h"
#include <stdlib.h>
#include <string.h>
#include "rdns.h"
#ifdef __cplusplus
extern "C" {
#endif
static void* rdns_libev_add_read (void *priv_data, int fd, void *user_data);
static void rdns_libev_del_read(void *priv_data, void *ev_data);
static void* rdns_libev_add_write (void *priv_data, int fd, void *user_data);
static void rdns_libev_del_write (void *priv_data, void *ev_data);
static void* rdns_libev_add_timer (void *priv_data, double after, void *user_data);
static void* rdns_libev_add_periodic (void *priv_data, double after,
rdns_periodic_callback cb, void *user_data);
static void rdns_libev_del_periodic (void *priv_data, void *ev_data);
static void rdns_libev_repeat_timer (void *priv_data, void *ev_data);
static void rdns_libev_del_timer (void *priv_data, void *ev_data);
struct rdns_ev_periodic_cbdata {
ev_timer *ev;
rdns_periodic_callback cb;
void *cbdata;
};
static void
rdns_bind_libev (struct rdns_resolver *resolver, struct ev_loop *loop)
{
static struct rdns_async_context ev_ctx = {
.data = NULL,
.add_read = rdns_libev_add_read,
.del_read = rdns_libev_del_read,
.add_write = rdns_libev_add_write,
.del_write = rdns_libev_del_write,
.add_timer = rdns_libev_add_timer,
.repeat_timer = rdns_libev_repeat_timer,
.del_timer = rdns_libev_del_timer,
.add_periodic = rdns_libev_add_periodic,
.del_periodic = rdns_libev_del_periodic,
.cleanup = NULL
}, *nctx;
void *ptr;
/* XXX: never got freed */
ptr = malloc (sizeof (struct rdns_async_context));
if (ptr != NULL) {
nctx = (struct rdns_async_context *)ptr;
memcpy (ptr, (void *)&ev_ctx, sizeof (struct rdns_async_context));
nctx->data = (void*)loop;
rdns_resolver_async_bind (resolver, nctx);
}
}
static void
rdns_libev_read_event (struct ev_loop *loop, ev_io *ev, int revents)
{
rdns_process_read (ev->fd, ev->data);
}
static void
rdns_libev_write_event (struct ev_loop *loop, ev_io *ev, int revents)
{
rdns_process_retransmit (ev->fd, ev->data);
}
static void
rdns_libev_timer_event (struct ev_loop *loop, ev_timer *ev, int revents)
{
rdns_process_timer (ev->data);
}
static void
rdns_libev_periodic_event (struct ev_loop *loop, ev_timer *ev, int revents)
{
struct rdns_ev_periodic_cbdata *cbdata = (struct rdns_ev_periodic_cbdata *)
ev->data;
cbdata->cb (cbdata->cbdata);
}
static void*
rdns_libev_add_read (void *priv_data, int fd, void *user_data)
{
ev_io *ev;
void *ptr;
ptr = malloc (sizeof (ev_io));
if (ptr != NULL) {
ev = (ev_io *)ptr;
ev_io_init (ev, rdns_libev_read_event, fd, EV_READ);
ev->data = user_data;
ev_io_start ((struct ev_loop *)priv_data, ev);
}
return ptr;
}
static void
rdns_libev_del_read (void *priv_data, void *ev_data)
{
ev_io *ev = (ev_io*)ev_data;
if (ev != NULL) {
ev_io_stop ((struct ev_loop *)priv_data, ev);
free ((void *)ev);
}
}
static void*
rdns_libev_add_write (void *priv_data, int fd, void *user_data)
{
ev_io *ev;
ev = (ev_io *)malloc (sizeof (ev_io));
if (ev != NULL) {
ev_io_init (ev, rdns_libev_write_event, fd, EV_WRITE);
ev->data = user_data;
ev_io_start ((struct ev_loop *)priv_data, ev);
}
return (void *)ev;
}
static void
rdns_libev_del_write (void *priv_data, void *ev_data)
{
ev_io *ev = (ev_io *)ev_data;
if (ev != NULL) {
ev_io_stop ((struct ev_loop *)priv_data, ev);
free ((void *)ev);
}
}
static void*
rdns_libev_add_timer (void *priv_data, double after, void *user_data)
{
ev_timer *ev;
ev = (ev_timer *)malloc (sizeof (ev_timer));
if (ev != NULL) {
ev_timer_init (ev, rdns_libev_timer_event, after, after);
ev->data = user_data;
ev_now_update_if_cheap ((struct ev_loop *)priv_data);
ev_timer_start ((struct ev_loop *)priv_data, ev);
}
return (void *)ev;
}
static void*
rdns_libev_add_periodic (void *priv_data, double after,
rdns_periodic_callback cb, void *user_data)
{
ev_timer *ev;
struct rdns_ev_periodic_cbdata *cbdata = NULL;
ev = (ev_timer *)malloc (sizeof (ev_timer));
if (ev != NULL) {
cbdata = (struct rdns_ev_periodic_cbdata *)
malloc (sizeof (struct rdns_ev_periodic_cbdata));
if (cbdata != NULL) {
cbdata->cb = cb;
cbdata->cbdata = user_data;
cbdata->ev = ev;
ev_timer_init (ev, rdns_libev_periodic_event, after, after);
ev->data = cbdata;
ev_now_update_if_cheap ((struct ev_loop *)priv_data);
ev_timer_start ((struct ev_loop *)priv_data, ev);
}
else {
free ((void *)ev);
return NULL;
}
}
return (void *)cbdata;
}
static void
rdns_libev_del_periodic (void *priv_data, void *ev_data)
{
struct rdns_ev_periodic_cbdata *cbdata = (struct rdns_ev_periodic_cbdata *)
ev_data;
if (cbdata != NULL) {
ev_timer_stop ((struct ev_loop *)priv_data, (ev_timer *)cbdata->ev);
free ((void *)cbdata->ev);
free ((void *)cbdata);
}
}
static void
rdns_libev_repeat_timer (void *priv_data, void *ev_data)
{
ev_timer *ev = (ev_timer *)ev_data;
if (ev != NULL) {
ev_now_update_if_cheap ((struct ev_loop *)priv_data);
ev_timer_again ((struct ev_loop *)priv_data, ev);
}
}
static void
rdns_libev_del_timer (void *priv_data, void *ev_data)
{
ev_timer *ev = (ev_timer *)ev_data;
if (ev != NULL) {
ev_timer_stop ((struct ev_loop *)priv_data, ev);
free ((void *)ev);
}
}
#ifdef __cplusplus
}
#endif
#endif /* RDNS_EV_H_ */
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