概述

skynet是云风开源的C实现的游戏服务器框架，架构上高性能，代码上干净整洁，提供lua接口灵活开发业务逻辑。skynet提供了socket、message、timer、http等基本能力，除此之外不做任何高维功能。

架构概览

skynet.c

main

static void
start(int thread) {
	pthread_t pid[thread+3];

	struct monitor *m = skynet_malloc(sizeof(*m));
	memset(m, 0, sizeof(*m));
	m->count = thread;
	m->sleep = 0;

	m->m = skynet_malloc(thread * sizeof(struct skynet_monitor *));
	int i;
	for (i=0;i<thread;i++) {
		m->m[i] = skynet_monitor_new();
	}
	if (pthread_mutex_init(&m->mutex, NULL)) {
		fprintf(stderr, "Init mutex error");
		exit(1);
	}
	if (pthread_cond_init(&m->cond, NULL)) {
		fprintf(stderr, "Init cond error");
		exit(1);
	}

	create_thread(&pid[0], thread_monitor, m);
	create_thread(&pid[1], thread_timer, m);
	create_thread(&pid[2], thread_socket, m);

	static int weight[] = { 
		-1, -1, -1, -1, 0, 0, 0, 0,
		1, 1, 1, 1, 1, 1, 1, 1, 
		2, 2, 2, 2, 2, 2, 2, 2, 
		3, 3, 3, 3, 3, 3, 3, 3, };
	struct worker_parm wp[thread];
	for (i=0;i<thread;i++) {
		wp[i].m = m;
		wp[i].id = i;
		if (i < sizeof(weight)/sizeof(weight[0])) {
			wp[i].weight= weight[i];
		} else {
			wp[i].weight = 0;
		}
		create_thread(&pid[i+3], thread_worker, &wp[i]);
	}

	for (i=0;i<thread+3;i++) {
		pthread_join(pid[i], NULL); 
	}

	free_monitor(m);
}

socket

socket模块是对网络，主要是epoll相关的封装，核心的函数有

thread_socket

skynet_socket_poll
socket_server_poll
forward_message

skynet_context_push

mq

mq模块支持了skynet消息驱动+回调函数的处理模式，核心函数有：

thread_worker


skynet_mq_push
skynet_mq_pop
skynet_context_message_dispatch
dispatch_message

timer

timer模块是对0.01s精度的计时器实现，使用多level结构，类似于linux的简单实现；

thread_timer

skynet_updatetime
timer_update
systime

monitor

monitor模块非常简单，监控消息的处理异常

skynet.lua

参考lua_c_example，skynet也是类似的：

C编写核心代码
C编写lua的core api
lua编写调用的C的user api
用户使用lua编程，不需要1行C语言

实战

example

./skynet examples/config        # Launch first skynet node  (Gate server) and a skynet-master (see config for standalone option)
./3rd/lua/lua examples/client.lua         # Launch a client, and try to input hello.