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/mem.c
+++ b/sysdeps/openbsd/mem.c
@@ -0,0 +1,141 @@
+/* $OpenBSD: mem.c,v 1.8 2011/05/26 08:07:22 jasper Exp $	*/
+
+/* Copyright (C) 1998 Joshua Sled
+   This file is part of LibGTop 1.0.
+
+   Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 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/mem.h>
+
+#include <glibtop_suid.h>
+
+#include <sys/sysctl.h>
+#include <sys/vmmeter.h>
+#include <uvm/uvm_extern.h>
+#include <uvm/uvm_param.h>
+
+static const unsigned long _glibtop_sysdeps_mem =
+(1L << GLIBTOP_MEM_TOTAL) + (1L << GLIBTOP_MEM_USED) +
+(1L << GLIBTOP_MEM_FREE) +
+(1L << GLIBTOP_MEM_SHARED) +
+(1L << GLIBTOP_MEM_BUFFER) +
+(1L << GLIBTOP_MEM_USER) + (1L << GLIBTOP_MEM_LOCKED);
+
+#ifndef LOG1024
+#define LOG1024		10
+#endif
+
+/* these are for getting the memory statistics */
+static int pageshift;		/* log base 2 of the pagesize */
+
+/* define pagetok in terms of pageshift */
+#define pagetok(size) ((size) << pageshift)
+
+/* nlist structure for kernel access */
+static struct nlist nlst [] = {
+	{ "_bufpages" },
+	{ 0 }
+};
+
+/* MIB array for sysctl */
+static int mib [] = { CTL_VM, VM_METER };
+static int mib_uvmexp [] = { CTL_VM, VM_UVMEXP };
+
+/* Init function. */
+
+void
+_glibtop_init_mem_p (glibtop *server)
+{
+	register int pagesize;
+
+	if (kvm_nlist (server->machine.kd, nlst) < 0) {
+		glibtop_warn_io_r (server, "kvm_nlist (mem)");
+		return;
+	}
+
+	/* get the page size and calculate pageshift from it */
+	pagesize = sysconf(_SC_PAGESIZE);
+	pageshift = 0;
+	while (pagesize > 1) {
+		pageshift++;
+		pagesize >>= 1;
+	}
+
+	/* we only need the amount of log(2)1024 for our conversion */
+	pageshift -= LOG1024;
+
+	server->sysdeps.mem = _glibtop_sysdeps_mem;
+}
+
+void
+glibtop_get_mem_p (glibtop *server, glibtop_mem *buf)
+{
+	struct vmtotal vmt;
+	size_t length_vmt;
+	struct uvmexp uvmexp;
+	size_t length_uvmexp;
+	u_int v_used_count;
+	u_int v_total_count;
+	u_int v_free_count;
+
+	glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_MEM), 0);
+
+	memset (buf, 0, sizeof (glibtop_mem));
+
+	if (server->sysdeps.mem == 0)
+		return;
+
+	/* Get the data from sysctl */
+	length_vmt = sizeof (vmt);
+	if (sysctl (mib, 2, &vmt, &length_vmt, NULL, 0)) {
+		glibtop_warn_io_r (server, "sysctl (vm.meter)");
+		return;
+	}
+
+	length_uvmexp = sizeof (uvmexp);
+	if (sysctl (mib_uvmexp, 2, &uvmexp, &length_uvmexp, NULL, 0)) {
+		glibtop_warn_io_r (server, "sysctl (uvmexp)");
+		return;
+	}
+
+	/*
+	 * t_arm = active real memory
+	 * t_rm = total real memory in use
+	 * t_free = free memory pages
+	 */
+	v_total_count = vmt.t_rm + vmt.t_free;
+	v_used_count = vmt.t_rm;
+	v_free_count = vmt.t_free;
+
+	/* convert memory stats to Kbytes */
+	buf->total = (guint64) pagetok (v_total_count) << LOG1024;
+	buf->used  = (guint64) pagetok (v_used_count) << LOG1024;
+	buf->free  = (guint64) pagetok (v_free_count) << LOG1024;
+	buf->locked = (guint64) pagetok (uvmexp.wired) << LOG1024;
+	buf->shared = (guint64) pagetok (vmt.t_rmshr) << LOG1024;
+	buf->buffer = 0;
+
+	buf->user = buf->total - buf->free - buf->shared - buf->buffer;
+
+	/* Set the values to return */
+	buf->flags = _glibtop_sysdeps_mem;
+}