一个简单的socket封装

SSSocket, 意思是simple stupid socket interface

目的：

编写一个易于消息数据读写、非阻塞、跨平台的socket封装。目前用于手机网游客户端

优点:

1.采用非阻塞的连接和IO，即使是单线程也不会阻塞UI

2.提供读写buffer

3.对完整消息读取友好的API

缺点：

1.单线程使用方式，目前考虑是游戏的每一帧，非阻塞的读写一次数据。与多线程或者阻塞IO方式相比，读写速度上差了一些

2.buffer使用的只是原生数组。从缓冲区取出数据后，缓冲区尾部未读取数据会用内存拷贝的方式移动到头部

接口：

//create a socket , ready to connect to host define by host_name and port
struct ssso* ssso_new(const char* host_name, int port);

//close socket
void  ssso_free(struct ssso* so);

//update socket, write data from buffer to socket, and if there is data readable, it return 1
int   ssso_check(struct ssso* so);

//peek whether has data of size in read buffer, return data or NULL
void* ssso_peek(struct ssso* so, size_t size);

//discard data of size in read buffer, mainly use after geting integrate message data using ssso_peek
void  ssso_discard(struct ssso* so, size_t size);

//write data to buffer, after do ssso_check, the data may be send through socket
void  ssso_write(struct ssso* so, const void* data, size_t size);

enum SSSO_STATUS ssso_status(struct ssso* so);

源代码地址：

https://github.com/wtyqm/SSSocket

参考：

API设计参考了云风的mread

http://blog.codingnow.com/2012/04/mread.html