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< a name = "l1" > < / a > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > Shrine mentions possibly using two FIFOs< / span > < span class = cF0 >
< a name = "l2" > < / a > < / span > < span class = cF2 > (in our case, Queues) for pending and< / span > < span class = cF0 >
< a name = "l3" > < / a > < / span > < span class = cF2 > empty frames. If logical to implement,< / span > < span class = cF0 >
< a name = "l4" > < / a > < / span > < span class = cF2 > perhaps Zeal NetQueue code should< / span > < span class = cF0 >
< a name = "l5" > < / a > < / span > < span class = cF2 > do something similar to that idea.< / span > < span class = cF0 >
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< a name = "l6" > < / a >
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< a name = "l7" > < / a > < / span > < span class = cF2 > Each Ethernet Frame will be represented< / span > < span class = cF0 >
< a name = "l8" > < / a > < / span > < span class = cF2 > as an entry in a CQueue. */< / span > < span class = cF0 >
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< a name = "l9" > < / a >
< a name = "l10" > < / a > < / span > < span class = cF1 > class< / span > < span class = cF0 > CNetQueueEntry:< / span > < span class = cF9 > CQueue< / span > < span class = cF0 >
< a name = "l11" > < / a > {
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< a name = "l12" > < / a > < / span > < span class = cF9 > I64< / span > < span class = cF0 > packet_length;
< a name = "l13" > < / a > < / span > < span class = cF1 > U8< / span > < span class = cF0 > frame[ETHERNET_FRAME_SIZE];
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< a name = "l14" > < / a > };
< a name = "l15" > < / a >
< a name = "l16" > < / a >
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< a name = "l17" > < / a > < / span > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > global variable, holds pointer of Ethernet Queue.< / span > < span class = cF0 >
< a name = "l18" > < / a > < / span > < span class = cF2 > This acts as the Head of the Queue, Entries act< / span > < span class = cF0 >
< a name = "l19" > < / a > < / span > < span class = cF2 > as the Tail of the Queue. < / span > < span class = cF0 >
< a name = "l20" > < / a > < / span > < span class = cF2 > Upon QueueInit, -> next and -> last are set to< / span > < span class = cF0 >
< a name = "l21" > < / a > < / span > < span class = cF2 > itself, the Head. */< / span > < span class = cF0 >
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< a name = "l22" > < / a >
< a name = "l23" > < / a > < / span > < span class = cF9 > CQueue< / span > < span class = cF0 > *net_queue; < / span > < span class = cF2 > // no QueueRemove the Head! only Entries!< / span > < span class = cF0 >
< a name = "l24" > < / a >
< a name = "l25" > < / a >
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< a name = "l26" > < / a > < / span > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > PCNet reroutes PCI interrupts to software. See < / span > < span class = cF4 > < u > PCNet< / u > < / span > < span class = cF2 > .< / span > < span class = cF0 >
< a name = "l27" > < / a > < / span > < span class = cF2 > Net Handler interrupt is generated whenever an entry is< / span > < span class = cF0 >
< a name = "l28" > < / a > < / span > < span class = cF2 > pushed to the NetQueue. See < / span > < span class = cF4 > < u > NetHandler< / u > < / span > < span class = cF2 > */< / span > < span class = cF0 >
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< a name = "l29" > < / a >
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< a name = "l30" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > I_PCNET0 < / span > < span class = cF3 > I_USER< / span > < span class = cF0 > + < / span > < span class = cFE > 0< / span > < span class = cF0 >
< a name = "l31" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > I_PCNET1 < / span > < span class = cF3 > I_USER< / span > < span class = cF0 > + < / span > < span class = cFE > 1< / span > < span class = cF0 >
< a name = "l32" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > I_PCNET2 < / span > < span class = cF3 > I_USER< / span > < span class = cF0 > + < / span > < span class = cFE > 2< / span > < span class = cF0 >
< a name = "l33" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > I_PCNET3 < / span > < span class = cF3 > I_USER< / span > < span class = cF0 > + < / span > < span class = cFE > 3< / span > < span class = cF0 >
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< a name = "l34" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > I_NETHANDLER < / span > < span class = cF3 > I_USER< / span > < span class = cF0 > + < / span > < span class = cFE > 4< / span > < span class = cF0 >
< a name = "l35" > < / a >
< a name = "l36" > < / a > #< / span > < span class = cF1 > define< / span > < span class = cF0 > INT_DEST_CPU < / span > < span class = cFE > 0< / span > < span class = cF0 >
< a name = "l37" > < / a >
< a name = "l38" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > NetQueueInit()
< a name = "l39" > < / a > {
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< a name = "l40" > < / a > net_queue = < / span > < span class = cF5 > CAlloc< / span > < span class = cF0 > (< / span > < span class = cF1 > sizeof< / span > < span class = cF7 > (< / span > < span class = cF9 > CQueue< / span > < span class = cF7 > )< / span > < span class = cF0 > );
< a name = "l41" > < / a > < / span > < span class = cF5 > QueueInit< / span > < span class = cF0 > (net_queue);
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< a name = "l42" > < / a > }
< a name = "l43" > < / a >
< a name = "l44" > < / a > CNetQueueEntry *NetQueuePull()
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< a name = "l45" > < / a > {< / span > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > Returns a pointer to a CNetQueueEntry,< / span > < span class = cF0 >
< a name = "l46" > < / a > < / span > < span class = cF2 > or NULL pointer if Net Queue is empty. */< / span > < span class = cF0 >
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< a name = "l47" > < / a >
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< a name = "l48" > < / a > CNetQueueEntry *entry;
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< a name = "l49" > < / a >
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< a name = "l50" > < / a > < / span > < span class = cF1 > if< / span > < span class = cF0 > (net_queue-> next != net_queue)
< a name = "l51" > < / a > < / span > < span class = cF7 > {< / span > < span class = cF0 >
< a name = "l52" > < / a > entry = net_queue-> next;
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< a name = "l53" > < / a >
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< a name = "l54" > < / a > NetLog(< / span > < span class = cF6 > " NETQUEUE PULL: Removing entry from queue." < / span > < span class = cF0 > );
< a name = "l55" > < / a > < / span > < span class = cF5 > QueueRemove< / span > < span class = cF0 > (entry);
< a name = "l56" > < / a > < / span > < span class = cF7 > }< / span > < span class = cF0 >
< a name = "l57" > < / a > < / span > < span class = cF1 > else< / span > < span class = cF0 > < / span > < span class = cF2 > // Queue is empty if head-> next is head itself.< / span > < span class = cF0 >
< a name = "l58" > < / a > < / span > < span class = cF7 > {< / span > < span class = cF0 >
< a name = "l59" > < / a > entry = < / span > < span class = cF3 > NULL< / span > < span class = cF0 > ;
< a name = "l60" > < / a > < / span > < span class = cF7 > }< / span > < span class = cF0 >
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< a name = "l61" > < / a >
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< a name = "l62" > < / a > < / span > < span class = cF1 > return< / span > < span class = cF0 > entry;
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< a name = "l63" > < / a > }
< a name = "l64" > < / a >
< a name = "l65" > < / a > < / span > < span class = cF1 > U0< / span > < span class = cF0 > NetQueuePush(< / span > < span class = cF1 > U8< / span > < span class = cF0 > *data, < / span > < span class = cF9 > I64< / span > < span class = cF0 > length)
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< a name = "l66" > < / a > {< / span > < span class = cF2 > /*< / span > < span class = cF0 > < / span > < span class = cF2 > Pushes a copy of the packet data and length< / span > < span class = cF0 >
< a name = "l67" > < / a > < / span > < span class = cF2 > into the Net Queue. The NetQueueEntry is inserted< / span > < span class = cF0 >
< a name = "l68" > < / a > < / span > < span class = cF2 > after the last entry of net_queue to keep new< / span > < span class = cF0 >
< a name = "l69" > < / a > < / span > < span class = cF2 > items in the back of the Queue, old in front. */< / span > < span class = cF0 >
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< a name = "l70" > < / a >
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< a name = "l71" > < / a > CNetQueueEntry *entry = < / span > < span class = cF5 > CAlloc< / span > < span class = cF0 > (< / span > < span class = cF1 > sizeof< / span > < span class = cF7 > (< / span > < span class = cF0 > CNetQueueEntry< / span > < span class = cF7 > )< / span > < span class = cF0 > );
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< a name = "l72" > < / a >
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< a name = "l73" > < / a > entry-> packet_length = length;
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< a name = "l74" > < / a >
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< a name = "l75" > < / a > < / span > < span class = cF5 > MemCopy< / span > < span class = cF0 > (entry-> frame, data, length);
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< a name = "l76" > < / a >
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< a name = "l77" > < / a > < / span > < span class = cF5 > QueueInsert< / span > < span class = cF0 > (entry, net_queue-> last);
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< a name = "l78" > < / a >
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< a name = "l79" > < / a > < / span > < span class = cF2 > // Generate Net Handler interrupt.< / span > < span class = cF0 >
< a name = "l80" > < / a > NetLog(< / span > < span class = cF6 > " NETQUEUE PUSH COPY: Generating NetHandler interrupt." < / span > < span class = cF0 > );
< a name = "l81" > < / a > < / span > < span class = cF5 > MPInt< / span > < span class = cF0 > (I_NETHANDLER, INT_DEST_CPU);
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< a name = "l82" > < / a > }
< a name = "l83" > < / a >
< a name = "l84" > < / a >
< a name = "l85" > < / a > NetQueueInit;< / span > < / pre > < / body >
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