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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 1.2 by pajs, Tue Feb 18 23:23:36 2003 UTC vs.
Revision 1.6 by pajs, Thu Apr 3 20:05:10 2003 UTC

#	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	+	long inactive;
58	+	size_t size;
59	+	int pagesize;
60	+	#endif
61
62		#ifdef SOLARIS
63		if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
#	Line 76 | Line 85 | mem_stat_t *get_memory_stats(){
85		mem_stat.total = (long long)totalmem * (long long)pagesize;
86		mem_stat.free = ((long long)kn->value.ul) * (long long)pagesize;
87		mem_stat.used = mem_stat.total - mem_stat.free;
88	+	#endif
89	+
90	+	#ifdef LINUX
91	+	f=fopen("/proc/meminfo", "r");
92	+	if(f==NULL){
93	+	return NULL;
94	+	}
95	+
96	+	if((line_ptr=f_read_line(f, "Mem:"))==NULL){
97	+	fclose(f);
98	+	return NULL;
99	+	}
100	+
101	+	fclose(f);
102	+
103	+	/* Linux actually stores this as a unsigned long long, but
104	+	* our structures are just long longs. This shouldn't be a
105	+	* problem for sometime yet :)
106	+	*/
107	+	if((sscanf(line_ptr,"Mem:  %lld %lld %lld %*d %*d %lld", \
108	+	&mem_stat.total, \
109	+	&mem_stat.used, \
110	+	&mem_stat.free, \
111	+	&mem_stat.cache))!=4){
112	+	return NULL;
113	+	}
114	+
115	+	#endif
116	+
117	+	#ifdef FREEBSD
118	+	/* Returns byes */
119	+	if (sysctlbyname("hw.physmem", NULL, &size, NULL, NULL) < 0){
120	+	return NULL;
121	+	}
122	+	if (sysctlbyname("hw.physmem", &mem_stat.total, &size, NULL, NULL) < 0){
123	+	return NULL;
124	+	}
125	+
126	+	/*returns pages*/
127	+	if (sysctlbyname("vm.stats.vm.v_free_count", NULL, &size, NULL, NULL) < 0){
128	+	return NULL;
129	+	}
130	+	if (sysctlbyname("vm.stats.vm.v_free_count", &mem_stat.free, &size, NULL, NULL) < 0){
131	+	return NULL;
132	+	}
133	+
134	+	if (sysctlbyname("vm.stats.vm.v_inactive_count", NULL, &size, NULL, NULL) < 0){
135	+	return NULL;
136	+	}
137	+	if (sysctlbyname("vm.stats.vm.v_inactive_count", &inactive , &size, NULL, NULL) < 0){
138	+	return NULL;
139	+	}
140	+
141	+	if (sysctlbyname("vm.stats.vm.v_cache_count", NULL, &size, NULL, NULL) < 0){
142	+	return NULL;
143	+	}
144	+	if (sysctlbyname("vm.stats.vm.v_cache_count", &mem_stat.cache, &size, NULL, NULL) < 0){
145	+	return NULL;
146	+	}
147	+
148	+	/* Because all the vm.stats returns pages, i need to get the page size.
149	+	* After that i then need to multiple the anything that used vm.stats to get
150	+	* the system statistics by pagesize
151	+	*/
152	+	if ((pagesize=getpagesize()) == -1){
153	+	return NULL;
154	+	}
155	+
156	+	mem_stat.cache=mem_stat.cache*pagesize;
157	+	/* Of couse nothing is ever that simple :) And i have inactive pages to deal
158	+	* with too. So im goingto add them to free memory :)
159	+	*/
160	+	mem_stat.free=(mem_stat.free*pagesize)+(inactive*pagesize);
161	+
162	+	mem_stat.used=mem_stat.total-mem_stat.free;
163	+
164		#endif
165
166		return &mem_stat;

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