1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/sys_info.h"
6
7 #include <ApplicationServices/ApplicationServices.h>
8 #include <CoreServices/CoreServices.h>
9 #include <mach/mach_host.h>
10 #include <mach/mach_init.h>
11
12 #include "base/logging.h"
13
14 namespace base {
15
16 // static
OperatingSystemVersionNumbers(int32 * major_version,int32 * minor_version,int32 * bugfix_version)17 void SysInfo::OperatingSystemVersionNumbers(int32 *major_version,
18 int32 *minor_version,
19 int32 *bugfix_version) {
20 Gestalt(gestaltSystemVersionMajor,
21 reinterpret_cast<SInt32*>(major_version));
22 Gestalt(gestaltSystemVersionMinor,
23 reinterpret_cast<SInt32*>(minor_version));
24 Gestalt(gestaltSystemVersionBugFix,
25 reinterpret_cast<SInt32*>(bugfix_version));
26 }
27
28 // static
AmountOfPhysicalMemory()29 int64 SysInfo::AmountOfPhysicalMemory() {
30 struct host_basic_info hostinfo;
31 mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
32 int result = host_info(mach_host_self(),
33 HOST_BASIC_INFO,
34 reinterpret_cast<host_info_t>(&hostinfo),
35 &count);
36 DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
37 if (result != KERN_SUCCESS) {
38 NOTREACHED();
39 return 0;
40 }
41
42 return static_cast<int64>(hostinfo.max_mem);
43 }
44
45 // static
GetPrimaryDisplayDimensions(int * width,int * height)46 void SysInfo::GetPrimaryDisplayDimensions(int* width, int* height) {
47 CGDirectDisplayID main_display = CGMainDisplayID();
48 if (width)
49 *width = CGDisplayPixelsWide(main_display);
50 if (height)
51 *height = CGDisplayPixelsHigh(main_display);
52 }
53
54 // static
DisplayCount()55 int SysInfo::DisplayCount() {
56 // Don't just return the number of online displays. It includes displays
57 // that mirror other displays, which are not desired in the count. It's
58 // tempting to use the count returned by CGGetActiveDisplayList, but active
59 // displays exclude sleeping displays, and those are desired in the count.
60
61 // It would be ridiculous to have this many displays connected, but
62 // CGDirectDisplayID is just an integer, so supporting up to this many
63 // doesn't hurt.
64 CGDirectDisplayID online_displays[128];
65 CGDisplayCount online_display_count = 0;
66 if (CGGetOnlineDisplayList(arraysize(online_displays),
67 online_displays,
68 &online_display_count) != kCGErrorSuccess) {
69 // 1 is a reasonable assumption.
70 return 1;
71 }
72
73 int display_count = 0;
74 for (CGDisplayCount online_display_index = 0;
75 online_display_index < online_display_count;
76 ++online_display_index) {
77 CGDirectDisplayID online_display = online_displays[online_display_index];
78 if (CGDisplayMirrorsDisplay(online_display) == kCGNullDirectDisplay) {
79 // If this display doesn't mirror any other, include it in the count.
80 // The primary display in a mirrored set will be counted, but those that
81 // mirror it will not be.
82 ++display_count;
83 }
84 }
85
86 return display_count;
87 }
88
89 } // namespace base
90