/*

   This file is part of LibGTop 2.0.

   LibGTop is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License,

   or (at your option) any later version.

   LibGTop is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

   for more details.

   You should have received a copy of the GNU General Public License

   along with LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <unistd.h>

#include <glibtop.h>

#include <glibtop/error.h>

#include <glibtop/cpu.h>

#include <glibtop_suid.h>

#include <mach/mach_init.h>

#include <mach/mach_host.h>

#include <mach/vm_map.h>

static const unsigned long _glibtop_sysdeps_cpu =

(1L << GLIBTOP_CPU_TOTAL)  + (1L << GLIBTOP_CPU_USER) +

(1L << GLIBTOP_CPU_NICE)   + (1L << GLIBTOP_CPU_SYS) +

(1L << GLIBTOP_CPU_IDLE)   + (1L << GLIBTOP_CPU_FREQUENCY) +

(1L << GLIBTOP_XCPU_TOTAL) + (1L << GLIBTOP_XCPU_USER) +

(1L << GLIBTOP_XCPU_NICE)  + (1L << GLIBTOP_XCPU_SYS) +

(1L << GLIBTOP_XCPU_IDLE);

/* Init function. */

void

_glibtop_init_cpu_p (glibtop *server)

{

	server->sysdeps.cpu = _glibtop_sysdeps_cpu;

}

/* Provides information about cpu usage. */

void

glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)

{

	processor_cpu_load_info_data_t *pinfo;

	mach_msg_type_number_t info_count;

	natural_t processor_count;

	int i;

	glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_CPU), 0);

	memset (buf, 0, sizeof (glibtop_cpu));

	if (host_processor_info (mach_host_self (),

				 PROCESSOR_CPU_LOAD_INFO,

				 &processor_count,

				 (processor_info_array_t*)&pinfo,

				 &info_count)) {

		glibtop_warn_io_r (server, "host_processor_info (cpu)");

		return;

	}

	for (i = 0; i < server->ncpu; i++) {

		buf->xcpu_user [i] = pinfo[i].cpu_ticks [CPU_STATE_USER];

		buf->xcpu_sys  [i] = pinfo[i].cpu_ticks [CPU_STATE_SYSTEM];

		buf->xcpu_idle [i] = pinfo[i].cpu_ticks [CPU_STATE_IDLE];

		buf->xcpu_nice [i] = pinfo[i].cpu_ticks [CPU_STATE_NICE];

		buf->xcpu_total[i] = buf->xcpu_user [i] + buf->xcpu_sys  [i] +

				     buf->xcpu_idle [i] + buf->xcpu_nice [i];

		buf->user  += buf->xcpu_user [i];

		buf->sys   += buf->xcpu_sys  [i];

		buf->idle  += buf->xcpu_idle [i];

		buf->nice  += buf->xcpu_nice [i];

		buf->total += buf->xcpu_total[i];

	}

	vm_deallocate (mach_task_self (), (vm_address_t) pinfo, info_count);

	buf->frequency = 100;

	buf->flags = _glibtop_sysdeps_cpu;

}