internal Enumerator(ref UIntPtrQueue queue)
{
this.pageEnumerator =
new UnmanagedPageList.Enumerator(ref queue.pageList);
this.lastPageLimit = queue.writeCursor.cursor;
this.lastPageStart =
PageTable.PageAlign((UIntPtr)lastPageLimit);
this.currentCursor = new PageCursor(null, null);
if (this.pageEnumerator.MoveNext())
{
UIntPtr currentPage = this.pageEnumerator.Current;
this.SetCursor(currentPage);
}
}
private static unsafe void processPLCList()
{
int startTicks = 0;
bool enableGCTiming = VTable.enableGCTiming;
if (enableGCTiming)
{
VTable.enableGCTiming = false;
startTicks = Environment.TickCount;
}
if (VTable.enableGCWatermarks)
{
MemoryAccounting.RecordHeapWatermarks();
}
#if DEBUG
VTable.Assert(firstPLCLink->objAddr == UIntPtr.Zero,
@"firstPLCLink->objAddr == UIntPtr.Zero");
#endif // DEBUG
// Let S be the subgraph of heap objects reachable from
// the PLC list. Decrement counts due to references in S.
for (PLCLink *link = firstPLCLink->next; link != null;
link = link->next)
{
UIntPtr objAddr = link->objAddr;
VTable.Assert(objAddr != UIntPtr.Zero,
@"objAddr != UIntPtr.Zero");
Object obj = Magic.fromAddress(objAddr);
VTable.Assert((obj.REF_STATE &
countingONFlagMask) != 0,
@"(obj.REF_STATE &
countingONFlagMask) != 0");
uint refState = obj.REF_STATE;
if ((refState & markFlagMask) == 0)
{
obj.REF_STATE = refState | markFlagMask;
internalDecrementer.Traverse(objAddr);
}
}
// Objects that now have non-zero counts are those that
// have references external to S incident on them.
// Recompute counts due to reachability from such objects.
for (PLCLink *link = firstPLCLink->next; link != null;
link = link->next)
{
UIntPtr objAddr = link->objAddr;
internalScanner.Traverse(objAddr);
}
// String together objects with reference count
// of zero for reclamation.
internalReclaimer.Initialize();
for (PLCLink *link = firstPLCLink->next; link != null;
link = link->next)
{
UIntPtr objAddr = link->objAddr;
internalReclaimer.Traverse(objAddr);
}
ulong reclaimedBytes = 0;
Object reclaimedObj = internalReclaimer.ReclaimedObjects;
while (reclaimedObj != null)
{
if (VTable.enableGCProfiling)
{
UIntPtr size = ObjectLayout.Sizeof(reclaimedObj);
reclaimedBytes += (ulong)size;
}
Object nextReclaimedObj = getNextLink(reclaimedObj);
SegregatedFreeList.Free(reclaimedObj);
reclaimedObj = nextReclaimedObj;
}
// Recycle the PLC list.
if (firstPLCLink->next != null)
{
PLCLink *lastPLCLink = firstPLCLink;
do
{
lastPLCLink = lastPLCLink->next;
} while (lastPLCLink->next != null);
lastPLCLink->next = plcListChunk;
plcListChunk = firstPLCLink->next;
firstPLCLink->next = null;
}
// Release the memory used up by work lists.
UIntPtrQueue.ReleaseStandbyPages(null);
SegregatedFreeList.RecycleGlobalPages();
SegregatedFreeList.CommitFreedData();
GC.newBytesSinceGC = UIntPtr.Zero;
if (enableGCTiming)
{
int elapsedTicks = Environment.TickCount - startTicks;
System.GC.gcTotalTime += elapsedTicks;
if (System.GC.maxPauseTime < elapsedTicks)
{
System.GC.maxPauseTime = elapsedTicks;
}
System.GC.pauseCount++;
VTable.enableGCTiming = true;
}
if (VTable.enableGCProfiling)
{
if (maxCyclicGarbage < reclaimedBytes)
{
maxCyclicGarbage = reclaimedBytes;
}
totalCyclicGarbage += reclaimedBytes;
cycleCollections++;
}
}
internal override void Initialize(PageType pageType)
{
base.Initialize(pageType);
this.workList = new UIntPtrQueue();
}
