unistd.h

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/* =============
 * apeNEXT/nlibc
 * =============
 *
 * $Id: unistd.h,v 2.8 2006/05/06 08:16:46 pleiter Exp $
 * -------------------------------------------------------------------------- */

#ifndef _NLIBC_UNISTD_H
#define _NLIBC_UNISTD_H

#include <nlibc.h>
#include <errno.h>
#include <stddef.h>

/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */

#ifndef __HAS_MAIN
extern void *w_sbrk(ptrdiff_t words);
#else
#if !defined(__cflow_processed) || defined(_uses_w_sbrk_unistd_h)
void *w_sbrk(ptrdiff_t words)
{
  register void *newHP;

  asm("\tatr $HP 0.$HP.-%0" :: "r" (words));
  asm("\tlutmove %0 $HP" : "=r" (newHP));
  asm("\tipushandbislt.L $HP $SP\n"
      "\t  pragma_stk_c5\n"
      "\t  sex <$SEX_NLCC_STK_OVFL>\n"
      "\t  pragma_stk_e5\n"
      "\tspop\n");

  return newHP;
}
#endif // _uses_w_sbrk_unistd_h
#endif // Has Main


#ifndef __HAS_MAIN
extern void *sbrk(ptrdiff_t inc_bytes);
#else
#if !defined(__cflow_processed) || defined(_uses_sbrk_unistd_h)
void *sbrk(ptrdiff_t inc_bytes)
{
  int words = (inc_bytes+15)>>4;
  return w_sbrk(words);
}
#endif // _uses_sbrk_unistd_h
#endif // Has Main


/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */

enum {
        _SC_CLK_TCK=2,          
};

#ifndef __HAS_MAIN
extern long sysconf(int name);
#else
#if !defined(__cflow_processed) || defined(_uses_sysconf_unistd_h)
long sysconf(int name)
{
  register long ret;

  switch (name) {
    case _SC_CLK_TCK:
    {
      register double clk_normfac;
      asm("\tLMTR %0 :1 $MEM_CLK_NORMFAC\n" : "=r" (clk_normfac));
      ret = (long) (1000. / clk_normfac);
      break;
    }
    default:
      errno = EINVAL;
      ret = -1;
  }

  return ret;
}
#endif // _uses_sysconf_unistd_h
#endif // Has Main


#ifdef _OS_
#include <os1/unistd.h>
#endif

#endif  // _NLIBC_UNISTD_H

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