SAL重复调用socket_new()

发布于 2021-01-19 17:45:22 浏览：824 订阅该版

`sal_socket()`和`sal_accept()`都调用了`socket_new()`，不是生成和占用两个块了吗？
```c
int sal_socket(int domain, int type, int protocol)
{
    int retval;
    int socket, proto_socket;
    struct sal_socket *sock;
    struct sal_proto_family *pf;

/* allocate a new socket and registered socket options */
    socket = socket_new(); //??????????????????????????????????????
    if (socket < 0)
    {
        return -1;
    }
    ......
}

int sal_accept(int socket, struct sockaddr *addr, socklen_t *addrlen)
{
    int new_socket;
    struct sal_socket *sock;
    struct sal_proto_family *pf;

/* get the socket object by socket descriptor */
    SAL_SOCKET_OBJ_GET(sock, socket);

/* check the network interface socket operations */
    SAL_NETDEV_SOCKETOPS_VALID(sock->netdev, pf, accept);
  
    new_socket = pf->skt_ops->accept((int) sock->user_data, addr, addrlen);
    if (new_socket != -1)
    {
        int retval;
        int new_sal_socket;
        struct sal_socket *new_sock;

/* allocate a new socket structure and registered socket options */
        new_sal_socket = socket_new(); //???????????????????????????
        if (new_sal_socket < 0)
        {
            pf->skt_ops->closesocket(new_socket);
            return -1;
        }
        ......
}
```