我正在读取TCP套接字：
int read_result = recv(socket_fd, &some_struct, some_size, 0);
如果read_result等于-1，我还是应该在该文件描述符上调用close还是保留它？
答案 0 :(得分：3)
根据public Transform WorldCenterPosition;
...
void Start () {
_cameraOffset = transform.position - PlayerTransform.position;
}
// Update is called once per frame
void Update () {
// Direction from World center to Player position
Vector3 direction = PlayerTransform.position - WorldCenterPosition.position;
// Distance for camera to be away (distance from player to world center
// plus distance from player to camera)
float distance = direction.magnitude + _cameraOffset.magnitude;
// Direction should be unit vector
direction = direction.normalized;
// Multiply our unit direction by calculated distance
Vector3 newPos = WorldCenterPosition.position + (direction*distance);
transform.position = Vector3.Slerp(transform.position, newPos, SmoothFactor);
// I suppose camera should look at player
transform.LookAt (PlayerTransform);
}
手册页，recv可能返回recv的原因有很多（EAGAIN，EBADF，EINVAL，ENOMEM等）。我建议对照这些预期的返回值检查-1并修改您的代码以采取相应的措施。如果要编写库，则可能要返回库特定的错误代码。如果您是应用程序，则可能要死亡或将错误代码返回给调用方。这取决于上下文。
但是，解决此问题的第一步是了解可以返回的各种错误代码，并相应地进行处理。