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CPM
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LANGUAGS
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C
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MFILE.LBR
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DEQUEUE.HZ
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DEQUEUE.H
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Text File
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2000-06-30
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896b
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30 lines
/* dequeue.h
* a generalized doubly linked circular list structure
*/
/* macro to return last and first dequeue element
(nb: lastnode is least recently used file descriptor in mfile application)
*/
#define lastNode (qNode->pNode)
#define firstNode (qNode->nNode)
/* generalized dequeue structure prefix - overlayed on user defined struct */
typedef struct q
{
struct q
*pNode, /* ptr to prev node */
*nNode; /* ptr to next node */
int nodeNum; /* node number - redundancy/optional */
/* rest of user defined structure resides here */
}
QUEUE;
/* storage for dequeue package */
extern QUEUE Nodeq; /* semaphore element - signals start & end of dequeue */
extern QUEUE *qNode; /* pointer to element */
/* end of dequeue.h */