bundles/org.simantics.nativemem/src/org/simantics/nativemem/NativeMem.java

   1 package org.simantics.nativemem;
   2
   3 import org.simantics.nativemem.internal.Arch;
   4 import org.simantics.nativemem.internal.OS;
   5 import org.simantics.nativemem.internal.Psapi32;
   6 import org.simantics.nativemem.internal.Psapi64;
   7
   8 import com.sun.jna.platform.win32.Kernel32;
   9 import com.sun.jna.platform.win32.WinNT.HANDLE;
  10
  11
  12 public class NativeMem {
  13
  14     /**
  15      * @param out
  16      *            the structure to write the result into or <code>null</code> to
  17      *            create a new structure
  18      * @return the result structure
  19      */
  20     public static ProcessMemoryCounters getMemoryCounters(ProcessMemoryCounters out) {
  21         if (out == null)
  22             out = new ProcessMemoryCounters();
  23
  24         OS os = OS.calculate();
  25         Arch arch = Arch.calculate();
  26         switch (os) {
  27         case WINDOWS: {
  28             HANDLE proc = Kernel32.INSTANCE.GetCurrentProcess();
  29             switch (arch) {
  30             case X86: {
  31                 Psapi32.PROCESS_MEMORY_COUNTERS_EX pmem = new Psapi32.PROCESS_MEMORY_COUNTERS_EX();
  32                 boolean ok = Psapi32.INSTANCE.GetProcessMemoryInfo(proc, pmem, pmem.size());
  33                 if (ok)
  34                     pmem.writeTo(out);
  35                 return out;
  36             }
  37
  38             case X86_64: {
  39                 Psapi64.PROCESS_MEMORY_COUNTERS_EX pmem = new Psapi64.PROCESS_MEMORY_COUNTERS_EX();
  40                 boolean ok = Psapi64.INSTANCE.GetProcessMemoryInfo(proc, pmem, pmem.size());
  41                 if (ok)
  42                     pmem.writeTo(out);
  43                 return out;
  44             }
  45
  46             default:
  47                 throw new UnsupportedOperationException("Architecture " + arch + " not supported on operating system " + os);
  48             }
  49         }
  50
  51         default:
  52             throw new UnsupportedOperationException("Operating system " + os + " not supported");
  53         }
  54     }
  55
  56 }