133 lines
4.9 KiB
C#
133 lines
4.9 KiB
C#
/*******************************************************************/
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/* WARNING */
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/* This file should be identical in the Bartok and Singularity */
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/* depots. Master copy resides in Bartok Depot. Changes should be */
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/* made to Bartok Depot and propagated to Singularity Depot. */
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/*******************************************************************/
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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namespace System.GCs {
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using Microsoft.Bartok.Runtime;
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using System.Runtime.CompilerServices;
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using System.Threading;
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internal unsafe class AllCardsWriteBarrier : WriteBarrier
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{
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internal static AllCardsWriteBarrier instance;
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internal static new void Initialize() {
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AllCardsWriteBarrier.instance = (AllCardsWriteBarrier)
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BootstrapMemory.Allocate(typeof(AllCardsWriteBarrier));
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}
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[Inline]
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protected override void StoreStaticFieldImpl(ref Object staticField,
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Object value)
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{
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// No need to mark the card for a static field.
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*Magic.toPointer(ref staticField) = Magic.addressOf(value);
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}
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protected override void CopyStructImpl(VTable vtable,
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UIntPtr srcPtr,
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UIntPtr dstPtr)
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{
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CopyStructWithBarrier(vtable, srcPtr, dstPtr);
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}
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[Inline]
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protected override Object AtomicSwapImpl(ref Object reference,
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Object value)
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{
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UIntPtr resultAddr =
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Interlocked.Exchange(Magic.toPointer(ref reference),
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Magic.addressOf(value));
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RecordReference(ref reference, value);
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return Magic.fromAddress(resultAddr);
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}
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[Inline]
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protected override
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Object AtomicCompareAndSwapImpl(ref Object reference,
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Object newValue,
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Object comparand)
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{
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UIntPtr resultAddr =
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Interlocked.CompareExchange(Magic.toPointer(ref reference),
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Magic.addressOf(newValue),
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Magic.addressOf(comparand));
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RecordReference(ref reference, newValue);
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return Magic.fromAddress(resultAddr);
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}
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[Inline]
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protected override void CloneImpl(Object srcObject, Object dstObject)
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{
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CloneNoBarrier(srcObject, dstObject);
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RecordClone(dstObject);
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}
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// 'offset' is not relative to the lower bound, but is a count
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// of elements from the first element in the array.
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protected override void ArrayZeroImpl(Array array,
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int offset,
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int length)
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{
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ArrayZeroNoBarrier(array, offset, length);
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}
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// 'offset' is not relative to the lower bound, but is a count
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// of elements from the first element in the array.
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protected override void ArrayCopyImpl(Array srcArray, int srcOffset,
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Array dstArray, int dstOffset,
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int length)
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{
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if ((length > 1000) || ((length << 2) >= dstArray.Length)) {
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ArrayCopyNoBarrier(srcArray, srcOffset,
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dstArray, dstOffset,
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length);
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RecordClone(dstArray);
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} else {
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ArrayCopyWithBarrier(srcArray, srcOffset,
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dstArray, dstOffset,
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length);
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}
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}
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[Inline]
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protected override void WriteReferenceImpl(UIntPtr *location,
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Object value)
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{
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*location = Magic.addressOf(value);
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RecordReference(location, value);
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}
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[Inline]
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private static void RecordClone(Object clone) {
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GenerationalCollector.installedRemSet.RecordClonedObject(clone);
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}
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[Inline]
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private static void RecordReference(ref Object location,
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Object value)
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{
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RecordReference(Magic.toPointer(ref location), value);
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}
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[Inline]
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private static void RecordReference(UIntPtr *location,
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Object value)
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{
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GenerationalCollector.
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installedRemSet.RecordReference(location, value);
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}
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}
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}
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