#include "stdinc.h"
#include "RcvWinBuf.h"

//
// Receiver Window Buffer
//

// --| create sender window buffer |--
RcvWinBuf::RcvWinBuf (int w0) {
  w = w0;
  lo = 0;
  buf = (Rbuf *) Calloc(w, sizeof(Rbuf));
  for (int i=0; i<w; i++) { buf[i].accept = NO; }
}

// --| advance window until 1st slot needs a pkt |--
void
RcvWinBuf::advWin (void) {
//printf ("  RcvWinBuff::advWin: lo = %d, w = %d, buf[].accept = %d\n",
//					lo, w, buf[lo%w].accept);
  while (buf[lo%w].accept == YES) {
    buf[lo%w].accept = NO;	// reset buffer descr
    ++lo;
  }
}