src/libstatgrab/memory_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program 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.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include "statgrab.h"
#ifdef LINUX
#include <string.h>
#endif
#ifdef SOLARIS
#include <unistd.h>
#include <kstat.h>
#endif
#ifdef FREEBSD
#include <sys/types.h>
#include <sys/sysctl.h>
#include <unistd.h>
#endif
#include "ukcprog.h"

mem_stat_t *get_memory_stats(){

        static mem_stat_t mem_stat;

#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        kstat_named_t *kn;
        long totalmem;
        int pagesize;
#endif

#ifdef SOLARIS
        if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
                return NULL;    
        }

        if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
                return NULL;
        }

        if ((kc = kstat_open()) == NULL) {
                return NULL;
        }
        if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
                return NULL;
        }
        if (kstat_read(kc, ksp, 0) == -1) {
                return NULL;
        }
        if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
                return NULL;
        }
        kstat_close(kc);

        mem_stat.total = (long long)totalmem * (long long)pagesize;
        mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
        mem_stat.used = mem_stat.total - mem_stat.free;
#endif

        return &mem_stat;

}
Revision:	1.2
Committed:	Tue Feb 18 23:23:36 2003 UTC (21 years, 3 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+2 -3 lines
Log Message:	Changed the kstat_close to not return NULL in event of a failure. If we cant close it, well there is nothing i can do about that, so i may as well at least return something useful since its done all the hardwork by that point. And anywan, it should never fail to close :)
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org.uk
4	* Copyright (C) 2000-2002 i-scream
5	*
6	* This program is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU General Public License
8	* as published by the Free Software Foundation; either version 2
9	* of the License, or (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19	*/
20
21	#ifdef HAVE_CONFIG_H
22	#include "config.h"
23	#endif
24
25	#include <stdio.h>
26	#include "statgrab.h"
27	#ifdef LINUX
28	#include <string.h>
29	#endif
30	#ifdef SOLARIS
31	#include <unistd.h>
32	#include <kstat.h>
33	#endif
34	#ifdef FREEBSD
35	#include <sys/types.h>
36	#include <sys/sysctl.h>
37	#include <unistd.h>
38	#endif
39	#include "ukcprog.h"
40
41	mem_stat_t *get_memory_stats(){
42
43	static mem_stat_t mem_stat;
44
45	#ifdef SOLARIS
46	kstat_ctl_t *kc;
47	kstat_t *ksp;
48	kstat_named_t *kn;
49	long totalmem;
50	int pagesize;
51	#endif
52
53	#ifdef SOLARIS
54	if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
55	return NULL;
56	}
57
58	if((totalmem=sysconf(_SC_PHYS_PAGES)) == -1){
59	return NULL;
60	}
61
62	if ((kc = kstat_open()) == NULL) {
63	return NULL;
64	}
65	if((ksp=kstat_lookup(kc, "unix", 0, "system_pages")) == NULL){
66	return NULL;
67	}
68	if (kstat_read(kc, ksp, 0) == -1) {
69	return NULL;
70	}
71	if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
72	return NULL;
73	}
74	kstat_close(kc);
75
76	mem_stat.total = (long long)totalmem * (long long)pagesize;
77	mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
78	mem_stat.used = mem_stat.total - mem_stat.free;
79	#endif
80
81	return &mem_stat;
82
83	}