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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