1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/sys_info.h"
#include <sys/param.h>
#include <sys/shm.h>
#include <sys/sysctl.h>
#include "base/logging.h"
namespace {
int64 AmountOfMemory(int pages_name) {
long pages = sysconf(pages_name);
long page_size = sysconf(_SC_PAGESIZE);
if (pages == -1 || page_size == -1) {
NOTREACHED();
return 0;
}
return static_cast<int64>(pages) * page_size;
}
} // namespace
namespace base {
// static
int SysInfo::NumberOfProcessors() {
int mib[] = { CTL_HW, HW_NCPU };
int ncpu;
size_t size = sizeof(ncpu);
if (sysctl(mib, arraysize(mib), &ncpu, &size, NULL, 0) < 0) {
NOTREACHED();
return 1;
}
return ncpu;
}
// static
int64 SysInfo::AmountOfPhysicalMemory() {
return AmountOfMemory(_SC_PHYS_PAGES);
}
// static
int64 SysInfo::AmountOfAvailablePhysicalMemory() {
return AmountOfMemory(_SC_AVPHYS_PAGES);
}
// static
size_t SysInfo::MaxSharedMemorySize() {
int mib[] = { CTL_KERN, KERN_SHMINFO, KERN_SHMINFO_SHMMAX };
size_t limit;
size_t size = sizeof(limit);
if (sysctl(mib, arraysize(mib), &limit, &size, NULL, 0) < 0) {
NOTREACHED();
return 0;
}
return limit;
}
// static
std::string SysInfo::CPUModelName() {
int mib[] = { CTL_HW, HW_MODEL };
char name[256];
size_t len = arraysize(name);
if (sysctl(mib, arraysize(mib), name, &len, NULL, 0) < 0) {
NOTREACHED();
return std::string();
}
return name;
}
} // namespace base
|
