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.h | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 CPP/Windows/System.h

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

diff --git a/CPP/Windows/System.h b/CPP/Windows/System.h
new file mode 100644
index 0000000..23cb0da
--- /dev/null
+++ b/CPP/Windows/System.h
@@ -0,0 +1,129 @@
+// Windows/System.h
+
+#ifndef __WINDOWS_SYSTEM_H
+#define __WINDOWS_SYSTEM_H
+
+#ifndef _WIN32
+// #include <sched.h>
+#include "../../C/Threads.h"
+#endif
+
+#include "../Common/MyTypes.h"
+
+namespace NWindows {
+namespace NSystem {
+
+
+#ifdef _WIN32
+
+UInt32 CountAffinity(DWORD_PTR mask);
+
+struct CProcessAffinity
+{
+  // UInt32 numProcessThreads;
+  // UInt32 numSysThreads;
+  DWORD_PTR processAffinityMask;
+  DWORD_PTR systemAffinityMask;
+
+  void InitST()
+  {
+    // numProcessThreads = 1;
+    // numSysThreads = 1;
+    processAffinityMask = 1;
+    systemAffinityMask = 1;
+  }
+
+  void CpuZero()
+  {
+    processAffinityMask = 0;
+  }
+
+  void CpuSet(unsigned cpuIndex)
+  {
+    processAffinityMask |= ((DWORD_PTR)1 << cpuIndex);
+  }
+
+  UInt32 GetNumProcessThreads() const { return CountAffinity(processAffinityMask); }
+  UInt32 GetNumSystemThreads() const { return CountAffinity(systemAffinityMask); }
+
+  BOOL Get();
+
+  BOOL SetProcAffinity() const
+  {
+    return SetProcessAffinityMask(GetCurrentProcess(), processAffinityMask);
+  }
+};
+
+
+#else // WIN32
+
+struct CProcessAffinity
+{
+  UInt32 numSysThreads;
+
+  UInt32 GetNumSystemThreads() const { return (UInt32)numSysThreads; }
+  BOOL Get();
+
+  #ifdef _7ZIP_AFFINITY_SUPPORTED
+
+  CCpuSet cpu_set;
+
+  void InitST()
+  {
+    numSysThreads = 1;
+    CpuSet_Zero(&cpu_set);
+    CpuSet_Set(&cpu_set, 0);
+  }
+
+  UInt32 GetNumProcessThreads() const { return (UInt32)CPU_COUNT(&cpu_set); }
+  void CpuZero()              { CpuSet_Zero(&cpu_set); }
+  void CpuSet(unsigned cpuIndex)   { CpuSet_Set(&cpu_set, cpuIndex); }
+  int IsCpuSet(unsigned cpuIndex) const { return CpuSet_IsSet(&cpu_set, cpuIndex); }
+  // void CpuClr(int cpuIndex) { CPU_CLR(cpuIndex, &cpu_set); }
+
+  BOOL SetProcAffinity() const
+  {
+    return sched_setaffinity(0, sizeof(cpu_set), &cpu_set) == 0;
+  }
+
+  #else
+
+  void InitST()
+  {
+    numSysThreads = 1;
+  }
+  
+  UInt32 GetNumProcessThreads() const
+  {
+    return numSysThreads;
+    /*
+    UInt32 num = 0;
+    for (unsigned i = 0; i < sizeof(cpu_set) * 8; i++)
+      num += (UInt32)((cpu_set >> i) & 1);
+    return num;
+    */
+  }
+  
+  void CpuZero() { }
+  void CpuSet(unsigned cpuIndex) { UNUSED_VAR(cpuIndex); }
+  int IsCpuSet(unsigned cpuIndex) const { return (cpuIndex < numSysThreads) ? 1 : 0; }
+
+  BOOL SetProcAffinity() const
+  {
+    errno = ENOSYS;
+    return FALSE;
+  }
+  
+  #endif
+};
+
+#endif
+
+
+UInt32 GetNumberOfProcessors();
+
+bool GetRamSize(UInt64 &size); // returns false, if unknown ram size
+
+}}
+
+#endif
-- 
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