/* Copyright (C) 2007 Benoît Dejean

   This file is part of LibGTop 2.

   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 <glibtop/procaffinity.h>

#include <glibtop/error.h>

#include <glibtop_private.h>

#include <sched.h>

void

_glibtop_init_proc_affinity_s(glibtop *server)

{

  server->sysdeps.proc_affinity =

    (1 << GLIBTOP_PROC_AFFINITY_NUMBER) |

    (1 << GLIBTOP_PROC_AFFINITY_ALL);

}

guint16 *

glibtop_get_proc_affinity_s(glibtop *server, glibtop_proc_affinity *buf, pid_t pid)

{

  cpu_set_t set;

  size_t i;

  GArray* cpus;

  memset(buf, 0, sizeof *buf);

  if (sched_getaffinity(pid, sizeof set, &set) == -1) {

    glibtop_error_r(server, "sched_getaffinity failed");

    return NULL;

  }

  cpus = g_array_new(FALSE, FALSE, sizeof(guint16));

  for (i = 0; i < MIN(CPU_SETSIZE, (size_t)(server->ncpu + 1)); i++) {

    if (CPU_ISSET(i, &set)) {

      guint16 n = i;

      g_array_append_val(cpus, n);

    }

  }

  buf->number = cpus->len;

  buf->all = (cpus->len == (size_t)(server->ncpu + 1));

  buf->flags = (1 << GLIBTOP_PROC_AFFINITY_NUMBER)

    | (1 << GLIBTOP_PROC_AFFINITY_ALL);

  return (guint16*) g_array_free(cpus, FALSE);

}