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root/i-scream/projects/libstatgrab/src/libstatgrab/memory_stats.c

Comparing projects/libstatgrab/src/libstatgrab/memory_stats.c (file contents):
Revision 1.1 by pajs, Tue Feb 18 19:28:30 2003 UTC vs.
Revision 1.10 by ats, Sat Oct 18 22:15:35 2003 UTC

#	Line 1 | Line 1
1		/*
2		* i-scream central monitoring system
3	<	* http://www.i-scream.org.uk
4	<	* Copyright (C) 2000-2002 i-scream
3	>	* http://www.i-scream.org
4	>	* Copyright (C) 2000-2003 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
#	Line 22 | Line 22
22		#include "config.h"
23		#endif
24
25	–	#include <stdio.h>
25		#include "statgrab.h"
27	–	#ifdef LINUX
28	–	#include <string.h>
29	–	#endif
26		#ifdef SOLARIS
27		#include <unistd.h>
28		#include <kstat.h>
29		#endif
30	+	#ifdef LINUX
31	+	#include <stdio.h>
32	+	#include <string.h>
33	+	#include "tools.h"
34	+	#endif
35		#ifdef FREEBSD
36		#include <sys/types.h>
37		#include <sys/sysctl.h>
38		#include <unistd.h>
39		#endif
39	–	#include "ukcprog.h"
40
41		mem_stat_t *get_memory_stats(){
42
#	Line 49 | Line 49 | mem_stat_t *get_memory_stats(){
49		long totalmem;
50		int pagesize;
51		#endif
52	+	#ifdef LINUX
53	+	char *line_ptr;
54	+	FILE *f;
55	+	#endif
56	+	#ifdef FREEBSD
57	+	u_int free_count;
58	+	u_int cache_count;
59	+	u_int inactive_count;
60	+	u_long physmem;
61	+	size_t size;
62	+	int pagesize;
63	+	#endif
64
65		#ifdef SOLARIS
66		if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
#	Line 71 | Line 83 | mem_stat_t *get_memory_stats(){
83		if((kn=kstat_data_lookup(ksp, "freemem")) == NULL){
84		return NULL;
85		}
86	<	if((kstat_close(kc)) != 0){
87	<	return NULL;
76	<	}
86	>	kstat_close(kc);
87	>
88		mem_stat.total = (long long)totalmem * (long long)pagesize;
89		mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
90		mem_stat.used = mem_stat.total - mem_stat.free;
91	+	#endif
92	+
93	+	#ifdef LINUX
94	+	f=fopen("/proc/meminfo", "r");
95	+	if(f==NULL){
96	+	return NULL;
97	+	}
98	+
99	+	if((line_ptr=f_read_line(f, "Mem:"))==NULL){
100	+	fclose(f);
101	+	return NULL;
102	+	}
103	+
104	+	fclose(f);
105	+
106	+	/* Linux actually stores this as a unsigned long long, but
107	+	* our structures are just long longs. This shouldn't be a
108	+	* problem for sometime yet :)
109	+	*/
110	+	if((sscanf(line_ptr,"Mem:  %lld %lld %lld %*d %*d %lld", \
111	+	&mem_stat.total, \
112	+	&mem_stat.used, \
113	+	&mem_stat.free, \
114	+	&mem_stat.cache))!=4){
115	+	return NULL;
116	+	}
117	+
118	+	#endif
119	+
120	+	#ifdef FREEBSD
121	+	/* Returns bytes */
122	+	if (sysctlbyname("hw.physmem", &physmem, &size, NULL, 0) < 0){
123	+	return NULL;
124	+	}
125	+
126	+	/*returns pages*/
127	+	if (sysctlbyname("vm.stats.vm.v_free_count", &free_count, &size, NULL, 0) < 0){
128	+	return NULL;
129	+	}
130	+
131	+	if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive_count , &size, NULL, 0) < 0){
132	+	return NULL;
133	+	}
134	+
135	+	if (sysctlbyname("vm.stats.vm.v_cache_count", &cache_count, &size, NULL, 0) < 0){
136	+	return NULL;
137	+	}
138	+
139	+	/* Because all the vm.stats returns pages, I need to get the page size.
140	+	* After that I then need to multiple the anything that used vm.stats to
141	+	* get the system statistics by pagesize
142	+	*/
143	+	if ((pagesize=getpagesize()) == -1){
144	+	return NULL;
145	+	}
146	+
147	+	mem_stat.total=physmem;
148	+	mem_stat.cache=cache_count*pagesize;
149	+
150	+	/* Of couse nothing is ever that simple :) And I have inactive pages to
151	+	* deal with too. So I'm going to add them to free memory :)
152	+	*/
153	+	mem_stat.free=(free_count*pagesize)+(inactive_count*pagesize);
154	+	mem_stat.used=physmem-mem_stat.free;
155		#endif
156
157		return &mem_stat;

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