BI_SringBR.c

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#include "Bdef.h"
 
void BI_SringBR(BLACSCONTEXT *ctxt, BLACBUFF *bp, SDRVPTR send, int src)
{
   void BI_Srecv(BLACSCONTEXT *, int, int, BLACBUFF *);
 
   int mydist;      /* my distance from source */
   int Np, Iam, msgid, rightedge;
 
   Np = ctxt->scp->Np;
   Iam = ctxt->scp->Iam;
   msgid = Mscopeid(ctxt);
 
   mydist = (Np + Iam - src) % Np;
   rightedge = Np/2;
   BI_Srecv(ctxt, BANYNODE, msgid, bp);
 
/*
 * If I'm between source & right edge of split ring, send to right
 */
   if (mydist < rightedge)
      send(ctxt, (Iam+1)%Np, msgid, bp);
/*
 * If I'm between source and left edge of split ring, send to left
 */
   else if (mydist > rightedge+1)
      send(ctxt, (Np+Iam-1)%Np, msgid, bp);
}