[libgtop] Implemented procaffinity for netBSD.

[Robert Roth <robertroth src gnome org>]

commit c68e077909a11e6e0b8ea2460eb1f9fec3e2b6b4
Author: Juan RP <xtraeme gmail com>
Date:   Sat Jun 20 03:35:56 2015 +0300

    Implemented procaffinity for netBSD.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=553713

 sysdeps/bsd/procaffinity.c |   87 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 87 insertions(+), 0 deletions(-)
---
diff --git a/sysdeps/bsd/procaffinity.c b/sysdeps/bsd/procaffinity.c
new file mode 100644
index 0000000..141341d
--- /dev/null
+++ b/sysdeps/bsd/procaffinity.c
@@ -0,0 +1,87 @@
+/* Copyright (C) 2008 Juan Romero Pardines <xtraeme gmail com>
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+#include <config.h>
+#include <glibtop/procaffinity.h>
+#include <glibtop/error.h>
+
+#include <sys/param.h>
+#if __NetBSD_Version__ >= 499007200    /* 4.99.72 to play safe */
+#include <sched.h>
+#endif
+
+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)
+{
+#if __NetBSD_Version__ >= 499007200
+  cpuset_t *cpuset;
+  size_t i;
+  GArray* cpus;
+
+  memset(buf, 0, sizeof *buf);
+
+  /* create the cpuset(3) */
+  cpuset = cpuset_create();
+  if (cpuset == NULL) {
+    glibtop_error_r(server, "cpuset_getaffinity (cpuset_create) failed");
+    return NULL;
+  }
+
+  /* get the affinity for _this_ pid, I assume that we always want lid 0 */
+  if ((_sched_getaffinity(pid, 0, cpuset_size(cpuset), cpuset)) != 0) {
+    cpuset_destroy(cpuset);
+    glibtop_error_r(server, "cpuset_getaffinity (_sched_getaffinity) failed");
+    return NULL;
+  }
+
+  cpus = g_array_new(FALSE, FALSE, sizeof(guint16));
+
+  for (i = 0; i < MIN(cpuset_size(cpuset), (size_t)(server->ncpu + 1)); i++) {
+    if (cpuset_isset(i, cpuset)) {
+      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);
+
+  /* we are done */
+  cpuset_destroy(cpuset);
+
+  return (guint16*) g_array_free(cpus, FALSE);
+#else
+  memset(buf, 0, sizeof *buf);
+
+  return NULL;
+#endif
+}