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/*
* Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
*
* 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.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER OR CONTRIBUTORS 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 __HIREDIS_LIBEV_H__
#define __HIREDIS_LIBEV_H__
#include <stdlib.h>
#include <sys/types.h>
#include <ev.h>
#include "../hiredis.h"
#include "../async.h"
typedef struct redisLibevEvents {
redisAsyncContext *context;
struct ev_loop *loop;
int reading, writing;
ev_io rev, wev;
ev_timer timer;
} redisLibevEvents;
static void redisLibevReadEvent(EV_P_ ev_io *watcher, int revents) {
#if EV_MULTIPLICITY
((void)EV_A);
#endif
((void)revents);
redisLibevEvents *e = (redisLibevEvents*)watcher->data;
redisAsyncHandleRead(e->context);
}
static void redisLibevWriteEvent(EV_P_ ev_io *watcher, int revents) {
#if EV_MULTIPLICITY
((void)EV_A);
#endif
((void)revents);
redisLibevEvents *e = (redisLibevEvents*)watcher->data;
redisAsyncHandleWrite(e->context);
}
static void redisLibevAddRead(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
if (!e->reading) {
e->reading = 1;
ev_io_start(EV_A_ &e->rev);
}
}
static void redisLibevDelRead(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
if (e->reading) {
e->reading = 0;
ev_io_stop(EV_A_ &e->rev);
}
}
static void redisLibevAddWrite(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
if (!e->writing) {
e->writing = 1;
ev_io_start(EV_A_ &e->wev);
}
}
static void redisLibevDelWrite(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
if (e->writing) {
e->writing = 0;
ev_io_stop(EV_A_ &e->wev);
}
}
static void redisLibevStopTimer(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
ev_timer_stop(EV_A_ &e->timer);
}
static void redisLibevCleanup(void *privdata) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
redisLibevDelRead(privdata);
redisLibevDelWrite(privdata);
redisLibevStopTimer(privdata);
hi_free(e);
}
static void redisLibevTimeout(EV_P_ ev_timer *timer, int revents) {
#if EV_MULTIPLICITY
((void)EV_A);
#endif
((void)revents);
redisLibevEvents *e = (redisLibevEvents*)timer->data;
redisAsyncHandleTimeout(e->context);
}
static void redisLibevSetTimeout(void *privdata, struct timeval tv) {
redisLibevEvents *e = (redisLibevEvents*)privdata;
#if EV_MULTIPLICITY
struct ev_loop *loop = e->loop;
#endif
if (!ev_is_active(&e->timer)) {
ev_init(&e->timer, redisLibevTimeout);
e->timer.data = e;
}
e->timer.repeat = tv.tv_sec + tv.tv_usec / 1000000.00;
ev_timer_again(EV_A_ &e->timer);
}
static int redisLibevAttach(EV_P_ redisAsyncContext *ac) {
redisContext *c = &(ac->c);
redisLibevEvents *e;
/* Nothing should be attached when something is already attached */
if (ac->ev.data != NULL)
return REDIS_ERR;
/* Create container for context and r/w events */
e = (redisLibevEvents*)hi_calloc(1, sizeof(*e));
if (e == NULL)
return REDIS_ERR;
e->context = ac;
#if EV_MULTIPLICITY
e->loop = EV_A;
#else
e->loop = NULL;
#endif
e->rev.data = e;
e->wev.data = e;
/* Register functions to start/stop listening for events */
ac->ev.addRead = redisLibevAddRead;
ac->ev.delRead = redisLibevDelRead;
ac->ev.addWrite = redisLibevAddWrite;
ac->ev.delWrite = redisLibevDelWrite;
ac->ev.cleanup = redisLibevCleanup;
ac->ev.scheduleTimer = redisLibevSetTimeout;
ac->ev.data = e;
/* Initialize read/write events */
ev_io_init(&e->rev,redisLibevReadEvent,c->fd,EV_READ);
ev_io_init(&e->wev,redisLibevWriteEvent,c->fd,EV_WRITE);
return REDIS_OK;
}
#endif
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