scheduling algorithm test (WRR)

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#include <stdio.h>

#define min(a, b) a <= b ? a : b;

int
main() {
  int queueLength[5] = {
    1,
    2,
    1,
    0,
    5
  };
  int radioLinkQuality[5] = {
    3,
    3,
    1,
    2,
    1
  }; // wi, configured at init

  int freeChannels = 10, intendedServedAmount = 0, actualServedAmount =
    0, lastUserServed = 0, emptyQueues = 0;

  int i = 0, j = 0, n = 5;

  printf("\n\n");
  for (i = 0; i < n; i++)
    printf("Weight of %d is %d.\n", i + 1, radioLinkQuality[i]);

  printf("\n\n");
  for (i = lastUserServed; i <= n; i++) {
    if (i == n) {
      lastUserServed = 0;
      i = 0;
    }

    printf("\tQUEUE LENGTH OF %d IS %d (weight=%d, free=%d).\n", i + 1,
      queueLength[i], radioLinkQuality[i], freeChannels);
    for (j = 0; j < n; j++)
      if (queueLength[j] == 0)
        emptyQueues++;
    if (emptyQueues == n) {
      printf("ALL QUEUES ARE EMPTY.\n");
      break;
    } else {
      emptyQueues = 0;
    }

    if (freeChannels == 0) {
      break;
    } else {
      intendedServedAmount = min(radioLinkQuality[i], queueLength[i]);
      actualServedAmount = min(intendedServedAmount, freeChannels);

      if (actualServedAmount > 0) {
        // send packets
        printf("Served user %d %d channels.\n", i + 1,
          actualServedAmount);
        freeChannels -= actualServedAmount;
        queueLength[i] -= actualServedAmount;
      }
    }

  }

  return 0;
}