4 // Author: Atsushi Enomoto <atsushi@ximian.com>
6 // Copyright (C) 2007 Novell, Inc (http://www.novell.com)
8 // Permission is hereby granted, free of charge, to any person obtaining
9 // a copy of this software and associated documentation files (the
10 // "Software"), to deal in the Software without restriction, including
11 // without limitation the rights to use, copy, modify, merge, publish,
12 // distribute, sublicense, and/or sell copies of the Software, and to
13 // permit persons to whom the Software is furnished to do so, subject to
14 // the following conditions:
16 // The above copyright notice and this permission notice shall be
17 // included in all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 namespace System.Runtime.InteropServices
32 public sealed class HandleCollector
35 readonly int init, max;
37 DateTime previous_collection = DateTime.MinValue;
39 public HandleCollector (string name, int initialThreshold)
40 : this (name, initialThreshold, int.MaxValue)
44 public HandleCollector (string name, int initialThreshold, int maximumThreshold)
46 if (initialThreshold < 0)
47 throw new ArgumentOutOfRangeException ("initialThreshold", "initialThreshold must not be less than zero");
48 if (maximumThreshold < 0)
49 throw new ArgumentOutOfRangeException ("maximumThreshold", "maximumThreshold must not be less than zero");
50 if (maximumThreshold < initialThreshold)
51 throw new ArgumentException ("maximumThreshold must not be less than initialThreshold");
54 init = initialThreshold;
55 max = maximumThreshold;
62 public int InitialThreshold {
66 public int MaximumThreshold {
78 GC.Collect (GC.MaxGeneration, GCCollectionMode.Forced);
79 else if (count >= init)
80 GC.Collect (GC.MaxGeneration, GCCollectionMode.Optimized);
83 GC.Collect (GC.MaxGeneration);
84 else if (count >= init && DateTime.Now - previous_collection > TimeSpan.FromSeconds (5)) { // some arbitrary criteria
85 GC.Collect (GC.MaxGeneration);
86 previous_collection = DateTime.Now;
93 throw new InvalidOperationException ("Cannot call Remove method when Count is 0");