// init server
void initServer(void) {
int j;
// ignore sighup, sigpipe
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
// 设置信号处理函数
setupSignalHandlers();
if (server.syslog_enabled) {
openlog(server.syslog_ident, LOG_PID | LOG_NDELAY | LOG_NOWAIT,
server.syslog_facility);
}
// 当前客户端相关状态
server.current_client = NULL;
// 创建一个链表, 用于存储客户端
server.clients = listCreate();
// 创建客户端关闭链表
server.clients_to_close = listCreate();
// 从redis链表
server.slaves = listCreate();
// 监控链表
server.monitors = listCreate();
server.slaveseldb = -1;
// 未锁定客户端链表
server.unblocked_clients = listCreate();
// 准备key链表
server.ready_keys = listCreate();
// 创建共享对象
createSharedObjects();
// 打开文件描述符限制
adjustOpenFilesLimit();
}
int main(int argc, char* argv[])
{
signal(SIGPIPE,SIG_IGN);
signal_exit_handler();
int background = 0;
if(background)
{
daemonize();
}
assert(argc == 5);
int maxclients = atoi(argv[3]) + CONFIG_FDSET_INCR;
adjustOpenFilesLimit(maxclients);
int epoll_fd = epoll_create(1024);
start_conn(epoll_fd,atoi(argv[3]), argv[1],atoi(argv[2]),atoi(argv[4]));
epoll_event *events = (epoll_event*)malloc(sizeof(struct epoll_event) * (maxclients) );
char buffer[2048];
while(!stop)
{
int fds = epoll_wait(epoll_fd,events,maxclients,2000);
for(int i = 0; i < fds; i++)
{
int sockfd = events[i].data.fd;
if(events[i].events & EPOLLIN)
{
if(!read_once(sockfd, buffer,2048))
{
close_conn(epoll_fd,sockfd);
}
struct epoll_event event;
event.events = EPOLLOUT | EPOLLET | EPOLLERR;
event.data.fd = sockfd;
epoll_ctl(epoll_fd,EPOLL_CTL_MOD,sockfd,&event);
}
else if(events[i].events & EPOLLOUT)
{
if(!write_nbytes(sockfd,request ,strlen(request)))
{
close_conn(epoll_fd,sockfd);
}
struct epoll_event event;
event.events = EPOLLIN | EPOLLERR;
event.data.fd = sockfd;
epoll_ctl(epoll_fd,EPOLL_CTL_MOD,sockfd,&event);
}
else if(events[i].events & EPOLLERR)
{
close_conn(epoll_fd,sockfd);
}
}
}
close(epoll_fd);
if(events)
{
free(events);
}
printf("exit!\n");
}
