/hiredis/adapters/libevent.h
C++ Header | 108 lines | 61 code | 14 blank | 33 comment | 2 complexity | e1bbd8e3e5d40015dee8591eac073e14 MD5 | raw file
1/* 2 * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com> 3 * 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * * Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * * Neither the name of Redis nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without 16 * specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#ifndef __HIREDIS_LIBEVENT_H__ 32#define __HIREDIS_LIBEVENT_H__ 33#include <event.h> 34#include "../hiredis.h" 35#include "../async.h" 36 37typedef struct redisLibeventEvents { 38 redisAsyncContext *context; 39 struct event rev, wev; 40} redisLibeventEvents; 41 42static void redisLibeventReadEvent(int fd, short event, void *arg) { 43 ((void)fd); ((void)event); 44 redisLibeventEvents *e = (redisLibeventEvents*)arg; 45 redisAsyncHandleRead(e->context); 46} 47 48static void redisLibeventWriteEvent(int fd, short event, void *arg) { 49 ((void)fd); ((void)event); 50 redisLibeventEvents *e = (redisLibeventEvents*)arg; 51 redisAsyncHandleWrite(e->context); 52} 53 54static void redisLibeventAddRead(void *privdata) { 55 redisLibeventEvents *e = (redisLibeventEvents*)privdata; 56 event_add(&e->rev,NULL); 57} 58 59static void redisLibeventDelRead(void *privdata) { 60 redisLibeventEvents *e = (redisLibeventEvents*)privdata; 61 event_del(&e->rev); 62} 63 64static void redisLibeventAddWrite(void *privdata) { 65 redisLibeventEvents *e = (redisLibeventEvents*)privdata; 66 event_add(&e->wev,NULL); 67} 68 69static void redisLibeventDelWrite(void *privdata) { 70 redisLibeventEvents *e = (redisLibeventEvents*)privdata; 71 event_del(&e->wev); 72} 73 74static void redisLibeventCleanup(void *privdata) { 75 redisLibeventEvents *e = (redisLibeventEvents*)privdata; 76 event_del(&e->rev); 77 event_del(&e->wev); 78 free(e); 79} 80 81static int redisLibeventAttach(redisAsyncContext *ac, struct event_base *base) { 82 redisContext *c = &(ac->c); 83 redisLibeventEvents *e; 84 85 /* Nothing should be attached when something is already attached */ 86 if (ac->ev.data != NULL) 87 return REDIS_ERR; 88 89 /* Create container for context and r/w events */ 90 e = (redisLibeventEvents*)malloc(sizeof(*e)); 91 e->context = ac; 92 93 /* Register functions to start/stop listening for events */ 94 ac->ev.addRead = redisLibeventAddRead; 95 ac->ev.delRead = redisLibeventDelRead; 96 ac->ev.addWrite = redisLibeventAddWrite; 97 ac->ev.delWrite = redisLibeventDelWrite; 98 ac->ev.cleanup = redisLibeventCleanup; 99 ac->ev.data = e; 100 101 /* Initialize and install read/write events */ 102 event_set(&e->rev,c->fd,EV_READ,redisLibeventReadEvent,e); 103 event_set(&e->wev,c->fd,EV_WRITE,redisLibeventWriteEvent,e); 104 event_base_set(base,&e->rev); 105 event_base_set(base,&e->wev); 106 return REDIS_OK; 107} 108#endif