CPP/Windows/System.cpp


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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

// Windows/System.cpp

#include "StdAfx.h"

#include "../Common/MyWindows.h"

#include "../Common/Defs.h"

#include "System.h"

namespace NWindows {
namespace NSystem {

UInt32 CountAffinity(DWORD_PTR mask)
{
  UInt32 num = 0;
  for (unsigned i = 0; i < sizeof(mask) * 8; i++)
    num += (UInt32)((mask >> i) & 1);
  return num;
}

#ifdef _WIN32

BOOL CProcessAffinity::Get()
{
  #ifndef UNDER_CE
  return GetProcessAffinityMask(GetCurrentProcess(), &processAffinityMask, &systemAffinityMask);
  #else
  return FALSE;
  #endif
}


UInt32 GetNumberOfProcessors()
{
  // We need to know how many threads we can use.
  // By default the process is assigned to one group.
  // So we get the number of logical processors (threads)
  // assigned to current process in the current group.
  // Group size can be smaller than total number logical processors, for exammple, 2x36

  CProcessAffinity pa;

  if (pa.Get() && pa.processAffinityMask != 0)
    return pa.GetNumProcessThreads();

  SYSTEM_INFO systemInfo;
  GetSystemInfo(&systemInfo);
  // the number of logical processors in the current group
  return (UInt32)systemInfo.dwNumberOfProcessors;
}

#else

UInt32 GetNumberOfProcessors()
{
  return 1;
}

#endif


#ifdef _WIN32

#ifndef UNDER_CE

#if !defined(_WIN64) && defined(__GNUC__)

typedef struct _MY_MEMORYSTATUSEX {
  DWORD dwLength;
  DWORD dwMemoryLoad;
  DWORDLONG ullTotalPhys;
  DWORDLONG ullAvailPhys;
  DWORDLONG ullTotalPageFile;
  DWORDLONG ullAvailPageFile;
  DWORDLONG ullTotalVirtual;
  DWORDLONG ullAvailVirtual;
  DWORDLONG ullAvailExtendedVirtual;
} MY_MEMORYSTATUSEX, *MY_LPMEMORYSTATUSEX;

#else

#define MY_MEMORYSTATUSEX MEMORYSTATUSEX
#define MY_LPMEMORYSTATUSEX LPMEMORYSTATUSEX

#endif

typedef BOOL (WINAPI *GlobalMemoryStatusExP)(MY_LPMEMORYSTATUSEX lpBuffer);

#endif

#endif


bool GetRamSize(UInt64 &size)
{
  size = (UInt64)(sizeof(size_t)) << 29;

  #ifdef _WIN32
  
  #ifndef UNDER_CE
    MY_MEMORYSTATUSEX stat;
    stat.dwLength = sizeof(stat);
  #endif
  
  #ifdef _WIN64
    
    if (!::GlobalMemoryStatusEx(&stat))
      return false;
    size = MyMin(stat.ullTotalVirtual, stat.ullTotalPhys);
    return true;

  #else
    
    #ifndef UNDER_CE
      GlobalMemoryStatusExP globalMemoryStatusEx = (GlobalMemoryStatusExP)
          ::GetProcAddress(::GetModuleHandle(TEXT("kernel32.dll")), "GlobalMemoryStatusEx");
      if (globalMemoryStatusEx && globalMemoryStatusEx(&stat))
      {
        size = MyMin(stat.ullTotalVirtual, stat.ullTotalPhys);
        return true;
      }
    #endif
  
    {
      MEMORYSTATUS stat2;
      stat2.dwLength = sizeof(stat2);
      ::GlobalMemoryStatus(&stat2);
      size = MyMin(stat2.dwTotalVirtual, stat2.dwTotalPhys);
      return true;
    }
  
  #endif

  #else

  return false;

  #endif
}

}}