服务启动依赖于进程,在进程中用swoole_server来创建,源码中的别名函数为swoole_server_create,默认的sock_type是tcp,服务模式serv_mode为进程模式。
long sock_type = SW_SOCK_TCP; long serv_port; long serv_mode = SW_MODE_PROCESS;
分配swServer内存并初始化
swServer_init(serv);
主要是factory_mode,反应器个数 reactor_num,分发模式dispatch_mode,环形缓冲区大小ringbuffer_size,超时时间(由timeout_sec和timeout_usec),工作进程数workker_num,最大连接数max_connection,最大请求数max_request,http_server服务配置信息,心跳空闲时间heartbeat_idel_time和检查时间间隔heartbeat_check_interval,缓冲区的输入输出大小buffer_input_size和buffer_output_size及管道缓存大小。
swoole_init(); bzero(serv, sizeof(swServer)); serv->factory_mode = SW_MODE_BASE; serv->reactor_num = SW_REACTOR_NUM > SW_REACTOR_MAX_THREAD ? SW_REACTOR_MAX_THREAD : SW_REACTOR_NUM; serv->dispatch_mode = SW_DISPATCH_FDMOD; serv->ringbuffer_size = SW_QUEUE_SIZE; serv->timeout_sec = SW_REACTOR_TIMEO_SEC; serv->timeout_usec = SW_REACTOR_TIMEO_USEC; //300ms; serv->worker_num = SW_CPU_NUM; serv->max_connection = SwooleG.max_sockets; serv->max_request = 0; //http server serv->http_parse_post = 1; serv->upload_tmp_dir = "/tmp"; //heartbeat check serv->heartbeat_idle_time = SW_HEARTBEAT_IDLE; serv->heartbeat_check_interval = SW_HEARTBEAT_CHECK; serv->buffer_input_size = SW_BUFFER_INPUT_SIZE; serv->buffer_output_size = SW_BUFFER_OUTPUT_SIZE; serv->pipe_buffer_size = SW_PIPE_BUFFER_SIZE; SwooleG.serv = serv;
同时解析服务主机ip,端口号,服务模式及sock_type,将服务器监听端口信息加入listen_list列表中swServer_add_port。
//create server socket int sock = swSocket_create(ls->type); if (sock < 0) { swSysError("create socket failed."); return NULL; } //bind address and port if (swSocket_bind(sock, ls->type, ls->host, ls->port) < 0) { return NULL; } //dgram socket, setting socket buffer size if (swSocket_is_dgram(ls->type)) { setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &ls->socket_buffer_size, sizeof(int)); setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &ls->socket_buffer_size, sizeof(int)); } //O_NONBLOCK & O_CLOEXEC swoole_fcntl_set_option(sock, 1, 1); ls->sock = sock; if (swSocket_is_dgram(ls->type)) { serv->have_udp_sock = 1; serv->dgram_port_num++; if (ls->type == SW_SOCK_UDP) { serv->udp_socket_ipv4 = sock; } else if (ls->type == SW_SOCK_UDP6) { serv->udp_socket_ipv6 = sock; } } else { serv->have_tcp_sock = 1; } LL_APPEND(serv->listen_list, ls); serv->listen_port_num++;
用swoole_server->start来启动(swoole_server_start),注册一些默认及自定义回调,日志初始化,根据服务模式实现工厂的初始化(php_swoole_server_before_start)。
工厂的启动函数会根据服务模式是创建多进程 还是单进程,线程还是线程(swServer_create)。
根据是否使用openssl来读取证书文件 ,是否开启守护模式来做日志初始化和开启守护。swServer_start_proxy创建main_reactor,负责处理监听套接字,同时创建reactor线程。
(推荐学习: swoole视频教程)
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