mcs/class/corlib/System/GC.cs

   1 //
   2 // System.GC.cs
   3 //
   4 // Author:
   5 //   Paolo Molaro (lupus@ximian.com)
   6 //
   7 // (C) 2001 Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Runtime.CompilerServices;
  34
  35 namespace System
  36 {
  37         public
  38 #if NET_2_0
  39         static
  40 #else
  41         sealed
  42 #endif
  43         class GC
  44         {
  45
  46 #if !NET_2_0
  47                 private GC ()
  48                 {
  49                 }
  50 #endif
  51
  52                 // TODO: as long as we use Boehm leave 0...
  53                 public static int MaxGeneration {
  54                         get {return 0;}
  55                 }
  56
  57                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  58                 extern static void InternalCollect (int generation);
  59
  60                 public static void Collect () {
  61                         InternalCollect (MaxGeneration);
  62                 }
  63
  64                 public static void Collect (int generation) {
  65                         if (generation < 0 || generation > MaxGeneration)
  66                                 throw new ArgumentOutOfRangeException ("generation");
  67                         InternalCollect (generation);
  68                 }
  69
  70                 public static int GetGeneration (object obj) {
  71                         return 0;
  72                 }
  73
  74                 public static int GetGeneration (WeakReference wo) {
  75                         if (!wo.IsAlive)
  76                                 throw new ArgumentException ();
  77                         return 0;
  78                 }
  79
  80                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  81                 public extern static long GetTotalMemory (bool forceFullCollection);
  82
  83                 /* this icall has weird semantics check the docs... */
  84                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  85                 public extern static void KeepAlive (object obj);
  86
  87                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  88                 public extern static void ReRegisterForFinalize (object obj);
  89
  90                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  91                 public extern static void SuppressFinalize (object obj);
  92
  93                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  94                 public extern static void WaitForPendingFinalizers ();
  95
  96         }
  97 }