#include "EXTERN.h"

#include "perl.h"

#include "XSUB.h"

MODULE = Sys::MemInfo PACKAGE = Sys::MemInfo

#include "arch/functions.h"

#include <sys/param.h>

#include <sys/pstat.h>

void

availkeys()

  PREINIT:

  PPCODE:

                XPUSHs(sv_2mortal(newSVpv(_totalmem, strlen(_totalmem))));

                XPUSHs(sv_2mortal(newSVpv(_freemem, strlen(_freemem))));

                XPUSHs(sv_2mortal(newSVpv(_totalswap, strlen(_totalswap))));

                XPUSHs(sv_2mortal(newSVpv(_freeswap, strlen(_freeswap))));

double

totalmem()

	PROTOTYPE: DISABLE	

	CODE:

    		struct pst_static pst_s;

		double pages = 0;

		double pagesize = 0;

    		if (pstat_getstatic (&pst_s, sizeof (struct pst_static), 1, 0) >= 0)

      		{

			pages = pst_s.physical_memory;

			pagesize = pst_s.page_size;

		}

		RETVAL = (pages * pagesize);

	OUTPUT:

		RETVAL

double

freemem()

	PROTOTYPE: DISABLE

	CODE:

		struct pst_static pst_s;

		struct pst_dynamic pst_d;

		double pages = 0;

		double pagesize = 0;

		if (pstat_getstatic (&pst_s, sizeof (struct pst_static), 1, 0) >=0 && pstat_getdynamic (&pst_d, sizeof (struct pst_dynamic), 1, 0) >=0)

      		{

			pages = pst_d.psd_free;

			pagesize = pst_s.page_size;

		}

		RETVAL = (pages * pagesize);

	OUTPUT:	

		RETVAL

double

totalswap()

  PROTOTYPE: DISABLE

  CODE:

    double ret= 0;

    struct pst_swapinfo pss;

    int i;

    for (i = 0; pstat_getswap(&pss, sizeof(pss), (size_t)1, i); i++) {

      ret += pss.pss_nblksenabled;

    }

    RETVAL = ret * 1024;

  OUTPUT:

    RETVAL

double

freeswap()

  PROTOTYPE: DISABLE

  CODE:

    double ret= 0;

    struct pst_swapinfo pss;

    int i;

    for (i = 0; pstat_getswap(&pss, sizeof(pss), (size_t)1, i); i++) {

      ret += pss.pss_nfpgs;

    }

    RETVAL = ret * 4 * 1024;

  OUTPUT:

    RETVAL

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