46706961ac
Move OpenBSD code into its own sysdeps directory. The changes from bsd/ were becoming to hard to maintain as a #ifdef tree. This is what's currently being distributed as part of OpenBSD ports.
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/* $OpenBSD: swap.c,v 1.6 2011/05/25 10:44:34 jasper Exp $ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/swap.h>
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#include <glibtop_suid.h>
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static const unsigned long _glibtop_sysdeps_swap =
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(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
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(1L << GLIBTOP_SWAP_FREE) + (1L << GLIBTOP_SWAP_PAGEIN) +
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(1L << GLIBTOP_SWAP_PAGEOUT);
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#include <sys/vmmeter.h>
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#include <uvm/uvm_extern.h>
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#include <sys/swap.h>
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static int mib_uvmexp [] = { CTL_VM, VM_UVMEXP };
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/* Init function. */
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void
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_glibtop_init_swap_p (glibtop *server)
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{
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server->sysdeps.swap = _glibtop_sysdeps_swap;
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}
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/* Provides information about swap usage. */
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/*
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* This function is based on a program called swapinfo written
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* by Kevin Lahey <kml@rokkaku.atl.ga.us>.
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*/
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void
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glibtop_get_swap_p (glibtop *server, glibtop_swap *buf)
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{
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struct swapent *swaplist;
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int nswap, i;
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guint64 avail = 0, inuse = 0;
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int blocksize = 512; /* Default blocksize, use getbize() ? */
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int blockdiv = blocksize / DEV_BSIZE;
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struct uvmexp uvmexp;
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size_t length_uvmexp;
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static int swappgsin = -1;
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static int swappgsout = -1;
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glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SWAP), 0);
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memset (buf, 0, sizeof (glibtop_swap));
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if (server->sysdeps.swap == 0)
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return;
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length_uvmexp = sizeof (uvmexp);
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if (sysctl (mib_uvmexp, 2, &uvmexp, &length_uvmexp, NULL, 0)) {
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glibtop_warn_io_r (server, "sysctl (uvmexp)");
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return;
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}
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if (swappgsin < 0) {
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buf->pagein = 0;
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buf->pageout = 0;
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} else {
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buf->pagein = uvmexp.swapins - swappgsin;
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buf->pageout = uvmexp.swapouts - swappgsout;
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}
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swappgsin = uvmexp.swapins;
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swappgsout = uvmexp.swapouts;
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nswap = swapctl (SWAP_NSWAP, 0, 0);
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if (nswap < 0) {
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glibtop_warn_io_r (server, "swapctl (SWAP_NSWAP)");
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return;
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}
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swaplist = g_malloc (nswap * sizeof (struct swapent));
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if (swapctl (SWAP_STATS, swaplist, nswap) != nswap) {
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glibtop_warn_io_r (server, "swapctl (SWAP_STATS)");
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g_free (swaplist);
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return;
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}
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/* Total things up, returns in 512 bytes blocks! */
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for (i = 0; i < nswap; i++) {
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if (swaplist[i].se_flags & SWF_ENABLE) {
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avail += (swaplist[i].se_nblks / blockdiv);
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inuse += (swaplist[i].se_inuse / blockdiv);
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}
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}
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/* Convert back to bytes, the libgtop2 is not clear about unites... */
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avail *= 512;
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inuse *= 512;
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g_free (swaplist);
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buf->flags = _glibtop_sysdeps_swap;
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buf->used = inuse;
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buf->free = avail;
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buf->total = inuse + avail;
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}
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