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/*

 * dhry_utils.c -- utility functions

 */

#include "dhry_utils.h"

/**************************************************************/

clock_t times(struct tms *buf) {

  static int firstCall = 1;

  volatile unsigned int *timerDivisor;

  volatile unsigned int *timerCounter;

  if (firstCall) {

    firstCall = 0;

    timerDivisor = (unsigned int *) 0xF0000004;

    *timerDivisor = 0xFFFFFFFF;

    buf->tms_utime = 0;

    buf->tms_stime = 0;

    buf->tms_cutime = 0;

    buf->tms_cstime = 0;

  } else {

    timerCounter = (unsigned int *) 0xF0000008;

    /* the counter counts in units of 20 nsec */

    /* but we want to count in units of 1 msec */

    buf->tms_utime = (0xFFFFFFFF - *timerCounter) / 50000;

    buf->tms_stime = 0;

    buf->tms_cutime = 0;

    buf->tms_cstime = 0;

  }

  return 0;

}

/**************************************************************/

#define MAX_MALLOC      100

static unsigned int a[MAX_MALLOC];

static unsigned int *p = a;

void *malloc(unsigned size) {

  void *q;

  size = (size + sizeof(unsigned) - 1) / sizeof(unsigned);

  if (p + size > &a[MAX_MALLOC]) {

    return 0;

  }

  q = p;

  p += size;

  return q;

}