// -*- C++ -*-
// $Id$

#include "Queued_Message.h"

#if !defined (__ACE_INLINE__)
# include "Queued_Message.inl"
#endif /* __ACE_INLINE__ */

ACE_RCSID (tao, 
           Queued_Message, 
           "$Id$")

TAO_Queued_Message::TAO_Queued_Message (ACE_Allocator *alloc,
                                        int is_heap_allocated)
  : allocator_ (alloc)
  , is_heap_created_ (is_heap_allocated)
  , next_ (0)
  , prev_ (0)
{
}

TAO_Queued_Message::~TAO_Queued_Message (void)
{
}

void
TAO_Queued_Message::remove_from_list (TAO_Queued_Message *&head,
                                      TAO_Queued_Message *&tail)
{
  if (this->prev_ != 0)
    {
      this->prev_->next_ = this->next_;
    }
  else if(head == this)
    {
      head = this->next_;
    }

  if (this->next_ != 0)
    {
      this->next_->prev_ = this->prev_;
    }
  else if(tail == this)
    {
      tail = this->prev_;
    }

  this->next_ = 0;
  this->prev_ = 0;
}

void
TAO_Queued_Message::push_back (TAO_Queued_Message *&head,
                               TAO_Queued_Message *&tail)
{
  if (tail == 0)
    {
      tail = this;
      head = this;
      this->next_ = 0;
      this->prev_ = 0;
      return;
    }

  tail->next_ = this;
  this->prev_ = tail;
  this->next_ = 0;
  tail = this;
}

void
TAO_Queued_Message::push_front (TAO_Queued_Message *&head,
                                TAO_Queued_Message *&tail)
{
  if (head == 0)
    {
      tail = this;
      head = this;
      this->next_ = 0;
      this->prev_ = 0;
      return;
    }

  head->prev_ = this;
  this->next_ = head;
  this->prev_ = 0;
  head = this;
}