public static void Cleanup() { if (!Enabled /*|| InsideGC*/) { return; } //try { InsideGC = true; #if GC_TRACE int startNumObjs = NumObjs; int startNumStrings = NumStrings; #endif ObjectToCleanup *currObjToCleanupPtr = CleanupList; ObjectToCleanup *prevObjToCleanupPtr = null; while (currObjToCleanupPtr != null) { GCHeader *objHeaderPtr = currObjToCleanupPtr->objHeaderPtr; void * objPtr = currObjToCleanupPtr->objPtr; if (objHeaderPtr->RefCount <= 0) { Testing2.Object obj = (Testing2.Object)Utilities.ObjectUtilities.GetObject(objPtr); if (obj is Testing2.String) { NumStrings--; } Heap.Free(objHeaderPtr); NumObjs--; } prevObjToCleanupPtr = currObjToCleanupPtr; currObjToCleanupPtr = currObjToCleanupPtr->prevPtr; RemoveObjectToCleanup(prevObjToCleanupPtr); } InsideGC = false; #if GC_TRACE PrintCleanupData(startNumObjs, startNumStrings); #endif } //finally { } }
public static void IncrementRefCount(Testing2.Object anObj) { if (!Enabled /*|| InsideGC*/ || anObj == null) { return; } InsideGC = true; byte *objPtr = (byte *)Utilities.ObjectUtilities.GetHandle(anObj); _IncrementRefCount(objPtr); InsideGC = false; }
public static void DecrementRefCount(Testing2.Object anObj, bool overrideInside) { if (!Enabled /*|| (InsideGC && !overrideInside)*/ || anObj == null) { return; } if (!overrideInside) { InsideGC = true; } byte *objPtr = (byte *)Utilities.ObjectUtilities.GetHandle(anObj); _DecrementRefCount(objPtr); if (!overrideInside) { InsideGC = false; } }
public static void _DecrementRefCount(byte *objPtr) { if ((uint)objPtr < (uint)sizeof(GCHeader)) { BasicConsole.SetTextColour(BasicConsole.error_colour); BasicConsole.WriteLine("Error! GC can't decrement ref count of an object in low memory."); BasicConsole.DelayOutput(5); BasicConsole.SetTextColour(BasicConsole.default_colour); } GCHeader *gcHeaderPtr = (GCHeader *)(objPtr - sizeof(GCHeader)); if (CheckSignature(gcHeaderPtr)) { gcHeaderPtr->RefCount--; //If the ref count goes below 0 then there was a circular reference somewhere. // In actuality we don't care we can just only do cleanup when the ref count is // exactly 0. if (gcHeaderPtr->RefCount == 0) { #if GC_TRACE BasicConsole.WriteLine("Cleaned up object."); #endif Testing2.Object obj = (Testing2.Object)Utilities.ObjectUtilities.GetObject(objPtr); if (obj is Testing2.Array) { //Decrement ref count of elements Testing2.Array arr = (Testing2.Array)obj; if (!arr.elemType.IsValueType) { Testing2.Object[] objArr = (Testing2.Object[])Utilities.ObjectUtilities.GetObject(objPtr); for (int i = 0; i < arr.length; i++) { DecrementRefCount(objArr[i], true); } } } //Cleanup fields FieldInfo *FieldInfoPtr = obj._Type.FieldTablePtr; //Loop through all fields. The if-block at the end handles moving to parent // fields. while (FieldInfoPtr != null) { if (FieldInfoPtr->Size > 0) { Testing2.Type fieldType = (Testing2.Type)Utilities.ObjectUtilities.GetObject(FieldInfoPtr->FieldType); if (!fieldType.IsValueType && !fieldType.IsPointer) { byte * fieldPtr = objPtr + FieldInfoPtr->Offset; Testing2.Object theFieldObj = (Testing2.Object)Utilities.ObjectUtilities.GetObject(fieldPtr); DecrementRefCount(theFieldObj, true); #if GC_TRACE BasicConsole.WriteLine("Cleaned up field."); #endif } FieldInfoPtr++; } if (FieldInfoPtr->Size == 0) { FieldInfoPtr = (FieldInfo *)FieldInfoPtr->FieldType; } } AddObjectToCleanup(gcHeaderPtr, objPtr); } } }
public static void DecrementRefCount(Testing2.Object anObj) { DecrementRefCount(anObj, false); }