131 lines
4.9 KiB
C
131 lines
4.9 KiB
C
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/*****************************************************************************
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** **
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** COPYRIGHT (C) 2000, 2001 MKNET CORPORATION **
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** DEVELOPED FOR THE MK7100-BASED VFIR PCI CONTROLLER. **
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** **
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*****************************************************************************/
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/**********************************************************************
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Module Name:
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QUEUE.H
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**********************************************************************/
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//-------------------------------------------------------------------------
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// QueueInitList -- Macro which will initialize a queue to NULL.
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//-------------------------------------------------------------------------
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#define QueueInitList(_L) (_L)->Link.Flink = (_L)->Link.Blink = (PLIST_ENTRY)0;
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//-------------------------------------------------------------------------
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// QueueEmpty -- Macro which checks to see if a queue is empty.
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//-------------------------------------------------------------------------
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#define QueueEmpty(_L) (QueueGetHead((_L)) == (PMK7_LIST_ENTRY)0)
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//-------------------------------------------------------------------------
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// QueueGetHead -- Macro which returns the head of the queue, but does not
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// remove the head from the queue.
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//-------------------------------------------------------------------------
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#define QueueGetHead(_L) ((PMK7_LIST_ENTRY)((_L)->Link.Flink))
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//-------------------------------------------------------------------------
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// QueuePushHead -- Macro which puts an element at the head of the queue.
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//-------------------------------------------------------------------------
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#define QueuePushHead(_L,_E) \
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ASSERT(_L); \
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ASSERT(_E); \
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if (!((_E)->Link.Flink = (_L)->Link.Flink)) \
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{ \
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(_L)->Link.Blink = (PLIST_ENTRY)(_E); \
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} \
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(_L)->Link.Flink = (PLIST_ENTRY)(_E);
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//-------------------------------------------------------------------------
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// QueueRemoveHead -- Macro which removes the head of the head of queue.
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//-------------------------------------------------------------------------
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#define QueueRemoveHead(_L) \
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{ \
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PMK7_LIST_ENTRY ListElem; \
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ASSERT((_L)); \
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if (ListElem = (PMK7_LIST_ENTRY)(_L)->Link.Flink) /* then fix up our our list to point to next elem */ \
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{ \
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if(!((_L)->Link.Flink = ListElem->Link.Flink)) /* rechain list pointer to next link */ \
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/* if the list pointer is null, null out the reverse link */ \
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(_L)->Link.Blink = (PLIST_ENTRY) 0; \
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} }
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//-------------------------------------------------------------------------
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// QueuePutTail -- Macro which puts an element at the tail (end) of the queue.
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//-------------------------------------------------------------------------
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#define QueuePutTail(_L,_E) \
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ASSERT(_L); \
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ASSERT(_E); \
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if ((_L)->Link.Blink) \
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{ \
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((PMK7_LIST_ENTRY)(_L)->Link.Blink)->Link.Flink = (PLIST_ENTRY)(_E); \
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(_L)->Link.Blink = (PLIST_ENTRY)(_E); \
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} \
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else \
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{ \
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(_L)->Link.Flink = \
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(_L)->Link.Blink = (PLIST_ENTRY)(_E); \
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} \
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(_E)->Link.Flink = (PLIST_ENTRY)0;
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//-------------------------------------------------------------------------
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// QueueGetTail -- Macro which returns the tail of the queue, but does not
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// remove the tail from the queue.
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//-------------------------------------------------------------------------
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#define QueueGetTail(_L) ((PMK7_LIST_ENTRY)((_L)->Link.Blink))
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//-------------------------------------------------------------------------
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// QueuePopHead -- Macro which will pop the head off of a queue (list), and
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// return it (this differs only from queueremovehead only in the 1st line)
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//-------------------------------------------------------------------------
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#define QueuePopHead(_L) \
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(PMK7_LIST_ENTRY) (_L)->Link.Flink; QueueRemoveHead(_L);
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typedef struct _MK7_RESERVED {
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// next packet in the chain of queued packets being allocated,
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// or waiting for the finish of transmission.
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//
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// We always keep the packet on a list so that in case the
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// the adapter is closing down or resetting, all the packets
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// can easily be located and "canceled".
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//
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PNDIS_PACKET Next;
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} MK7_RESERVED,*PMK7_RESERVED;
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#define PMK7_RESERVED_FROM_PACKET(_Packet) \
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((PMK7_RESERVED)((_Packet)->MiniportReserved))
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#define EnqueuePacket(_Head, _Tail, _Packet) \
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{ \
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if (!_Head) { \
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_Head = _Packet; \
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} else { \
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PMK7_RESERVED_FROM_PACKET(_Tail)->Next = _Packet; \
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} \
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PMK7_RESERVED_FROM_PACKET(_Packet)->Next = NULL; \
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_Tail = _Packet; \
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}
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#define DequeuePacket(Head, Tail) \
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{ \
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PMK7_RESERVED Reserved = \
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PMK7_RESERVED_FROM_PACKET(Head); \
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if (!Reserved->Next) { \
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Tail = NULL; \
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} \
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Head = Reserved->Next; \
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}
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