From f19f813537c7aea1c20749c914e756b54a9c3cf5 Mon Sep 17 00:00:00 2001
From: Igor Pavlov <87184205+ip7z@users.noreply.github.com>
Date: Mon, 27 Dec 2021 00:00:00 +0000
Subject: '21.07'

---
 CPP/Windows/System.cpp | 234 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 234 insertions(+)
 create mode 100644 CPP/Windows/System.cpp

(limited to 'CPP/Windows/System.cpp')

diff --git a/CPP/Windows/System.cpp b/CPP/Windows/System.cpp
new file mode 100644
index 0000000..3a14b77
--- /dev/null
+++ b/CPP/Windows/System.cpp
@@ -0,0 +1,234 @@
+// Windows/System.cpp
+
+#include "StdAfx.h"
+
+#ifndef _WIN32
+#include <unistd.h>
+#ifdef __APPLE__
+#include <sys/sysctl.h>
+#else
+#include <sys/sysinfo.h>
+#endif
+#endif
+
+#include "../Common/Defs.h"
+// #include "../Common/MyWindows.h"
+
+// #include "../../C/CpuArch.h"
+
+#include "System.h"
+
+namespace NWindows {
+namespace NSystem {
+
+#ifdef _WIN32
+
+UInt32 CountAffinity(DWORD_PTR mask)
+{
+  UInt32 num = 0;
+  for (unsigned i = 0; i < sizeof(mask) * 8; i++)
+    num += (UInt32)((mask >> i) & 1);
+  return num;
+}
+
+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
+
+
+BOOL CProcessAffinity::Get()
+{
+  numSysThreads = GetNumberOfProcessors();
+
+  /*
+  numSysThreads = 8;
+  for (unsigned i = 0; i < numSysThreads; i++)
+    CpuSet_Set(&cpu_set, i);
+  return TRUE;
+  */
+  
+  #ifdef _7ZIP_AFFINITY_SUPPORTED
+  
+  // numSysThreads = sysconf(_SC_NPROCESSORS_ONLN); // The number of processors currently online
+  if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) != 0)
+    return FALSE;
+  return TRUE;
+  
+  #else
+  
+  // cpu_set = ((CCpuSet)1 << (numSysThreads)) - 1;
+  return TRUE;
+  // errno = ENOSYS;
+  // return FALSE;
+  
+  #endif
+}
+
+UInt32 GetNumberOfProcessors()
+{
+  #ifndef _7ZIP_ST
+  long n = sysconf(_SC_NPROCESSORS_CONF);  // The number of processors configured
+  if (n < 1)
+    n = 1;
+  return (UInt32)n;
+  #else
+  return 1;
+  #endif
+}
+
+#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 // !UNDER_CE
+
+  
+bool GetRamSize(UInt64 &size)
+{
+  size = (UInt64)(sizeof(size_t)) << 29;
+
+  #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)
+          (void *)::GetProcAddress(::GetModuleHandleA("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
+
+// POSIX
+// #include <stdio.h>
+
+bool GetRamSize(UInt64 &size)
+{
+  size = (UInt64)(sizeof(size_t)) << 29;
+
+  #ifdef __APPLE__
+
+    #ifdef HW_MEMSIZE
+      uint64_t val = 0; // support 2Gb+ RAM
+      int mib[2] = { CTL_HW, HW_MEMSIZE };
+    #elif defined(HW_PHYSMEM64)
+      uint64_t val = 0; // support 2Gb+ RAM
+      int mib[2] = { CTL_HW, HW_PHYSMEM64 };
+    #else
+      unsigned int val = 0; // For old system
+      int mib[2] = { CTL_HW, HW_PHYSMEM };
+    #endif // HW_MEMSIZE
+      size_t size_sys = sizeof(val);
+
+      sysctl(mib, 2, &val, &size_sys, NULL, 0);
+      if (val)
+        size = val;
+
+  #elif defined(_AIX)
+  // fixme
+  #elif defined(__gnu_hurd__)
+  // fixme
+  #elif defined(__FreeBSD_kernel__) && defined(__GLIBC__)
+  // GNU/kFreeBSD Debian
+  // fixme
+  #else
+
+  struct sysinfo info;
+  if (::sysinfo(&info) != 0)
+    return false;
+  size = (UInt64)info.mem_unit * info.totalram;
+  const UInt64 kLimit = (UInt64)1 << (sizeof(size_t) * 8 - 1);
+  if (size > kLimit)
+    size = kLimit;
+
+  /*
+  printf("\n mem_unit  = %lld", (UInt64)info.mem_unit);
+  printf("\n totalram  = %lld", (UInt64)info.totalram);
+  printf("\n freeram   = %lld", (UInt64)info.freeram);
+  */
+
+  #endif
+
+  return true;
+}
+
+#endif
+
+}}
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