c ++ boost :: asio :: buffer和结构

Question

无论如何基本上做以下事情:

#include <boost/asio.hpp>

struct testStruct{
    int x;
    int y;
};

int main(){
    struct testStruct t;
    boost::asio::buffer b;
    b = boost::asio::buffer(t); 
    return 0;
}

似乎失败的地方是将't'传递到缓冲区'b'.

Answer 1

使用多个缓冲区的分散操作:

#include <boost/asio.hpp>

#include <vector>

struct testStruct{
    int x;
    int y;
};

int
main()
{
    struct testStruct t;
    t.x = 5;
    t.y = 7;

    std::vector<boost::asio::const_buffer> buffers;
    buffers.push_back( boost::asio::buffer(&t.x, sizeof(t.x) ) );
    buffers.push_back( boost::asio::buffer(&t.y, sizeof(t.y) ) );

    boost::asio::io_service io_service;
    boost::asio::ip::tcp::socket socket( io_service ); // note not connected!
    std::size_t length = boost::asio::write( socket, buffers );

    return 0;
}

请注意,您需要在接收方使用相应的聚集.除了你提出的人为例子之外,这一点非常繁琐.这就是为什么我建议在前一个问题中使用更强大的序列化机制.