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 using System.Runtime.ConstrainedExecution;
  35 using System.Security.Permissions;
  36
  37 namespace System
  38 {
  39         public static class GC
  40         {
  41
  42                 public extern static int MaxGeneration {
  43                         [MethodImplAttribute(MethodImplOptions.InternalCall)]
  44                         get;
  45                 }
  46
  47                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  48                 extern static void InternalCollect (int generation);
  49
  50                 public static void Collect () {
  51                         InternalCollect (MaxGeneration);
  52                 }
  53
  54                 public static void Collect (int generation) {
  55                         if (generation < 0)
  56                                 throw new ArgumentOutOfRangeException ("generation");
  57                         InternalCollect (generation);
  58                 }
  59
  60                 [MonoDocumentationNote ("mode parameter ignored")]
  61                 public static void Collect (int generation, GCCollectionMode mode) {
  62                         Collect (generation);
  63                 }
  64
  65                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  66                 public extern static int GetGeneration (object obj);
  67
  68                 public static int GetGeneration (WeakReference wo) {
  69                         object obj = wo.Target;
  70                         if (obj == null)
  71                                 throw new ArgumentException ();
  72                         return GetGeneration (obj);
  73                 }
  74
  75                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  76                 public extern static long GetTotalMemory (bool forceFullCollection);
  77
  78                 /* this icall has weird semantics check the docs... */
  79                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
  80                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  81                 public extern static void KeepAlive (object obj);
  82
  83                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  84                 public extern static void ReRegisterForFinalize (object obj);
  85
  86                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  87                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  88                 public extern static void SuppressFinalize (object obj);
  89
  90                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  91                 public extern static void WaitForPendingFinalizers ();
  92
  93                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  94                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  95                 public extern static int CollectionCount (int generation);
  96
  97                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
  98                 private extern static void RecordPressure (long bytesAllocated);
  99
 100                 public static void AddMemoryPressure (long bytesAllocated) {
 101                         RecordPressure (bytesAllocated);
 102                 }
 103
 104                 public static void RemoveMemoryPressure (long bytesAllocated) {
 105                         RecordPressure (-bytesAllocated);
 106                 }
 107
 108 #if NET_4_0
 109                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 110                 [MonoTODO]
 111                 public static GCNotificationStatus WaitForFullGCApproach () {
 112                         throw new NotImplementedException ();
 113                 }
 114
 115                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 116                 [MonoTODO]
 117                 public static GCNotificationStatus WaitForFullGCApproach (int millisecondsTimeout) {
 118                         throw new NotImplementedException ();
 119                 }
 120
 121                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 122                 [MonoTODO]
 123                 public static GCNotificationStatus WaitForFullGCComplete () {
 124                         throw new NotImplementedException ();
 125                 }
 126
 127                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 128                 [MonoTODO]
 129                 public static GCNotificationStatus WaitForFullGCComplete (int millisecondsTimeout) {
 130                         throw new NotImplementedException ();
 131                 }
 132
 133                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 134                 public static void RegisterForFullGCNotification (int maxGenerationThreshold, int largeObjectHeapThreshold) {
 135                         if (maxGenerationThreshold < 1 || maxGenerationThreshold > 99)
 136                                 throw new ArgumentOutOfRangeException ("maxGenerationThreshold", maxGenerationThreshold, "maxGenerationThreshold must be between 1 and 99 inclusive");
 137                         if (largeObjectHeapThreshold < 1 || largeObjectHeapThreshold > 99)
 138                                 throw new ArgumentOutOfRangeException ("largeObjectHeapThreshold", largeObjectHeapThreshold, "largeObjectHeapThreshold must be between 1 and 99 inclusive");
 139                         throw new NotImplementedException ();
 140                 }
 141
 142                 [PermissionSetAttribute (SecurityAction.LinkDemand, Name = "FullTrust")]
 143                 public static void CancelFullGCNotification () {
 144                         throw new NotImplementedException ();
 145                 }
 146 #endif
 147
 148 #if NET_4_0 || MOONLIGHT
 149                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 150                 internal extern static void register_ephemeron_array (Ephemeron[] array);
 151
 152                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 153                 extern static object get_ephemeron_tombstone ();
 154
 155                 internal static readonly object EPHEMERON_TOMBSTONE = get_ephemeron_tombstone ();
 156 #endif
 157         }
 158 }