Split off OpenBSD code into a separate implementation

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.
2011-06-16 12:27:00 +02:00
parent edda30a4ad
commit 46706961ac
40 changed files with 3600 additions and 2 deletions
--- a/sysdeps/openbsd/swap.c
+++ b/sysdeps/openbsd/swap.c
@@ -0,0 +1,131 @@
+/* $OpenBSD: swap.c,v 1.6 2011/05/25 10:44:34 jasper Exp $	*/
+
+/* Copyright (C) 1998-99 Martin Baulig
+   This file is part of LibGTop 1.0.
+
+   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
+
+   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.h>
+#include <glibtop/error.h>
+#include <glibtop/swap.h>
+
+#include <glibtop_suid.h>
+
+static const unsigned long _glibtop_sysdeps_swap =
+(1L << GLIBTOP_SWAP_TOTAL) + (1L << GLIBTOP_SWAP_USED) +
+(1L << GLIBTOP_SWAP_FREE) + (1L << GLIBTOP_SWAP_PAGEIN) +
+(1L << GLIBTOP_SWAP_PAGEOUT);
+
+#include <sys/vmmeter.h>
+#include <uvm/uvm_extern.h>
+#include <sys/swap.h>
+
+static int mib_uvmexp [] = { CTL_VM, VM_UVMEXP };
+
+/* Init function. */
+
+void
+_glibtop_init_swap_p (glibtop *server)
+{
+	server->sysdeps.swap = _glibtop_sysdeps_swap;
+}
+
+/* Provides information about swap usage. */
+
+/*
+ * This function is based on a program called swapinfo written
+ * by Kevin Lahey <kml@rokkaku.atl.ga.us>.
+ */
+
+void
+glibtop_get_swap_p (glibtop *server, glibtop_swap *buf)
+{
+	struct swapent *swaplist;
+
+	int nswap, i;
+	guint64 avail = 0, inuse = 0;
+
+	int blocksize = 512; /* Default blocksize, use getbize() ? */
+	int blockdiv = blocksize / DEV_BSIZE;
+
+	struct uvmexp uvmexp;
+	size_t length_uvmexp;
+        static int swappgsin = -1;
+	static int swappgsout = -1;
+
+	glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_SWAP), 0);
+
+	memset (buf, 0, sizeof (glibtop_swap));
+
+	if (server->sysdeps.swap == 0)
+		return;
+
+	length_uvmexp = sizeof (uvmexp);
+	if (sysctl (mib_uvmexp, 2, &uvmexp, &length_uvmexp, NULL, 0)) {
+		glibtop_warn_io_r (server, "sysctl (uvmexp)");
+		return;
+	}
+
+        if (swappgsin < 0) {
+		buf->pagein = 0;
+		buf->pageout = 0;
+	} else {
+		buf->pagein = uvmexp.swapins - swappgsin;
+		buf->pageout = uvmexp.swapouts - swappgsout;
+	}
+
+	swappgsin = uvmexp.swapins;
+	swappgsout = uvmexp.swapouts;
+
+	nswap = swapctl (SWAP_NSWAP, 0, 0);
+	if (nswap < 0) {
+		glibtop_warn_io_r (server, "swapctl (SWAP_NSWAP)");
+		return;
+	}
+
+	swaplist = g_malloc (nswap * sizeof (struct swapent));
+
+	if (swapctl (SWAP_STATS, swaplist, nswap) != nswap) {
+		glibtop_warn_io_r (server, "swapctl (SWAP_STATS)");
+		g_free (swaplist);
+		return;
+	}
+
+	/* Total things up, returns in 512 bytes blocks! */
+	for (i = 0; i < nswap; i++) {
+		if (swaplist[i].se_flags & SWF_ENABLE) {
+			avail += (swaplist[i].se_nblks / blockdiv);
+			inuse += (swaplist[i].se_inuse / blockdiv);
+		}
+	}
+
+	/* Convert back to bytes, the libgtop2 is not clear about unites... */
+	avail *= 512;
+	inuse *= 512;
+
+	g_free (swaplist);
+
+	buf->flags = _glibtop_sysdeps_swap;
+
+	buf->used = inuse;
+	buf->free = avail;
+
+	buf->total = inuse + avail;
+}