Redis的Client设计

Redis的client设计如下：/* With multiplexing we need to take per-clinet state.
* Clients are taken in a liked list. */
typedef struct redisClient {
int fd;
redisDb *db;
int dictid;
sds querybuf;
robj **argv, **mbargv;
int argc, mbargc;
int bulklen; /* bulk read len. -1 if not in bulk read mode */
int multibulk; /* multi bulk command format active */
list *reply;
int sentlen;
time_t lastinteraction; /* time of the last interaction, used for timeout */
int flags; /* REDIS_CLOSE | REDIS_SLAVE | REDIS_MONITOR */
int slaveseldb; /* slave selected db, if this client is a slave */
int authenticated; /* when requirepass is non-NULL */
int replstate; /* replication state if this is a slave */
int repldbfd; /* replication DB file descriptor */
long repldboff; /* replication DB file offset */
off_t repldbsize; /* replication DB file size */
} redisClient;在accpet后，开始创建一个client。代码如下：static client createClient（void） {
client c = zmalloc（sizeof（struct _client））;
char err[ANET_ERR_LEN]; c->fd = anetTcpNonBlockConnect（err,config.hostip,config.hostport）;
if （c->fd == ANET_ERR） {
zfree（c）;
fprintf（stderr,"Connect: %s ",err）;
return NULL;
}
anetTcpNoDelay（NULL,c->fd）;
c->obuf = sdsempty（）;
c->ibuf = sdsempty（）;
c->mbulk = -1;
c->readlen = 0;
c->written = 0;
c->totreceived = 0;
c->state = CLIENT_CONNECTING;
aeCreateFileEvent（config.el, c->fd, AE_WRITABLE, writeHandler, c）;
config.liveclients++;
listAddNodeTail（config.clients,c）;
return c;
}窃以为，以下代码写的有点那个。 listAddNodeTail（config.clients,c）;这个函数既然命名为createclient就该做create的事，而把listaddnodetail放到外层函数里面实现。既然在createclient函数里实现了add功能，又再返回一个c指针到外层函数实现超出链接数判断，显得有些畸形。同学们，你们觉得呢？Ubuntu 14.04下Redis安装及简单测试 http://www.linuxidc.com/Linux/2014-05/101544.htmRedis集群明细文档 http://www.linuxidc.com/Linux/2013-09/90118.htmUbuntu 12.10下安装Redis（图文详解）+ Jedis连接Redis http://www.linuxidc.com/Linux/2013-06/85816.htmRedis系列-安装部署维护篇 http://www.linuxidc.com/Linux/2012-12/75627.htmCentOS 6.3安装Redis http://www.linuxidc.com/Linux/2012-12/75314.htmRedis安装部署学习笔记 http://www.linuxidc.com/Linux/2014-07/104306.htmRedis配置文件redis.conf 详解 http://www.linuxidc.com/Linux/2013-11/92524.htmRedis 的详细介绍：请点这里
Redis 的下载地址：请点这里本文永久更新链接地址