c++ - boost singleton_pool::malloc 返回多少内存？

Question

由于某些原因，我的代码出现了段错误。这是相关的代码。

typedef boost::singleton_pool<httpHandler,sizeof(httphandler)> httpHandlerpool;
typedef boost::singleton_pool<Conn ,sizeof(Conn)> connpool;


void *httphandler::operator new(size_t size)
{
     return httpHandlerpool::malloc();
}

//there is a corresponding delete as well.    

void *Conn::operator new(size_t size)
{
     return connpool::malloc();
}

//there is a corresponding delete as well.



Conn* httpHandler::getFreeConn()
{
    Conn *c=0;
    c = new Conn(); // 
    memset(c,0,sizeof *c); // This is where looks like some issue is there.
    return c
}

在这段代码中，当我执行新的 Conn 时，将分配多少内存？是“sizeof struct Conn”吗？我在 memset 上做错了什么？有必要吗？谢谢。