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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Runtime.CompilerServices;
using System.Runtime.ConstrainedExecution;
using System.Diagnostics.Contracts;
namespace System.Runtime
{
// These settings are the same format as in clr\src\vm\gcpriv.h
// make sure you change that file if you change this file!
[Serializable]
public enum GCLargeObjectHeapCompactionMode
{
Default = 1,
CompactOnce = 2
}
[Serializable]
public enum GCLatencyMode
{
Batch = 0,
Interactive = 1,
LowLatency = 2,
SustainedLowLatency = 3,
NoGCRegion = 4
}
public static class GCSettings
{
private enum SetLatencyModeStatus
{
Succeeded = 0,
NoGCInProgress = 1 // NoGCRegion is in progress, can't change pause mode.
};
public static GCLatencyMode LatencyMode
{
get
{
return (GCLatencyMode)(GC.GetGCLatencyMode());
}
// We don't want to allow this API when hosted.
set
{
if ((value < GCLatencyMode.Batch) || (value > GCLatencyMode.SustainedLowLatency))
{
throw new ArgumentOutOfRangeException(SR.ArgumentOutOfRange_Enum);
}
Contract.EndContractBlock();
if (GC.SetGCLatencyMode((int)value) == (int)SetLatencyModeStatus.NoGCInProgress)
throw new InvalidOperationException("The NoGCRegion mode is in progress. End it and then set a different mode.");
}
}
public static GCLargeObjectHeapCompactionMode LargeObjectHeapCompactionMode
{
get
{
return (GCLargeObjectHeapCompactionMode)(GC.GetLOHCompactionMode());
}
// We don't want to allow this API when hosted.
set
{
if ((value < GCLargeObjectHeapCompactionMode.Default) ||
(value > GCLargeObjectHeapCompactionMode.CompactOnce))
{
throw new ArgumentOutOfRangeException(SR.ArgumentOutOfRange_Enum);
}
Contract.EndContractBlock();
GC.SetLOHCompactionMode((int)value);
}
}
public static bool IsServerGC
{
get
{
return GC.IsServerGC();
}
}
}
}
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