deque in fq.cc

[Sean Shunxing Xie <sxie@CS.UCLA.EDU>]

Hi,

   I am new to NS and C++. I have a question regarding deque function calls in fq.cc.
The following code is in function update().

                Queue * q = fs_[i].q_;
                if (q != 0) {
                        if (fs_[i].hol_ == 0) {
                                Packet* p = q->deque();

My question is this: Which deque will be called when "Packet* p = q->deque();" is executed?

A similar question about the deque function calls in  drop-tail.cc:

Packet* DropTail::deque()
{
        return q_->deque();
}

Which function is called? I think it should call the virtual function function in PacketQueue class (in
queue.h), but it didn't. Anyone can give me some help?


Sean