internal void OnFileChange(FileAction action, string fileName, DateTime utcCompletion)
{
try
{
FileMonitor fileMon = null;
ArrayList list = null;
FileAttributesData attributes = null;
FileAttributesData fad = null;
byte[] dacl = null;
byte[] buffer2 = null;
FileAction error = FileAction.Error;
DateTime minValue = DateTime.MinValue;
bool fileMonitorForSpecialDirectory = false;
if (this._dirMonCompletion != null)
{
lock (this)
{
ICollection targets;
if (this._fileMons.Count > 0)
{
if ((action == FileAction.Error) || (action == FileAction.Overwhelming))
{
if (action == FileAction.Overwhelming)
{
HttpRuntime.SetShutdownMessage("Overwhelming Change Notification in " + this.Directory);
if (Interlocked.Increment(ref s_notificationBufferSizeIncreased) == 1)
{
System.Web.UnsafeNativeMethods.GrowFileNotificationBuffer(HttpRuntime.AppDomainAppIdInternal, this._watchSubtree);
}
}
else if (action == FileAction.Error)
{
HttpRuntime.SetShutdownMessage("File Change Notification Error in " + this.Directory);
}
list = new ArrayList();
foreach (DictionaryEntry entry in this._fileMons)
{
string key = (string)entry.Key;
fileMon = (FileMonitor)entry.Value;
if ((fileMon.FileNameLong == key) && fileMon.Exists)
{
fileMon.ResetCachedAttributes();
fileMon.LastAction = action;
fileMon.UtcLastCompletion = utcCompletion;
targets = fileMon.Targets;
list.AddRange(targets);
}
}
fileMon = null;
}
else
{
fileMon = (FileMonitor)this._fileMons[fileName];
if (this._isDirMonAppPathInternal && (fileMon == null))
{
fileMonitorForSpecialDirectory = this.GetFileMonitorForSpecialDirectory(fileName, ref fileMon);
}
if (fileMon != null)
{
list = new ArrayList(fileMon.Targets);
attributes = fileMon.Attributes;
dacl = fileMon.Dacl;
error = fileMon.LastAction;
minValue = fileMon.UtcLastCompletion;
fileMon.LastAction = action;
fileMon.UtcLastCompletion = utcCompletion;
if ((action == FileAction.Removed) || (action == FileAction.RenamedOldName))
{
fileMon.MakeExtinct();
}
else if (fileMon.Exists)
{
if (minValue != utcCompletion)
{
fileMon.UpdateCachedAttributes();
}
}
else
{
int num3;
FindFileData data = null;
string fullPath = Path.Combine(this.Directory, fileMon.FileNameLong);
if (this._isDirMonAppPathInternal)
{
num3 = FindFileData.FindFile(fullPath, this.Directory, out data);
}
else
{
num3 = FindFileData.FindFile(fullPath, out data);
}
if (num3 == 0)
{
string fileNameShort = fileMon.FileNameShort;
byte[] buffer3 = FileSecurity.GetDacl(fullPath);
fileMon.MakeExist(data, buffer3);
this.UpdateFileNameShort(fileMon, fileNameShort, data.FileNameShort);
}
}
fad = fileMon.Attributes;
buffer2 = fileMon.Dacl;
}
}
}
if (this._anyFileMon != null)
{
targets = this._anyFileMon.Targets;
if (list != null)
{
list.AddRange(targets);
}
else
{
list = new ArrayList(targets);
}
}
if ((action == FileAction.Error) || (action == FileAction.Overwhelming))
{
((IDisposable)this).Dispose();
}
}
bool flag2 = false;
if ((!fileMonitorForSpecialDirectory && (fileName != null)) && (action == FileAction.Modified))
{
FileAttributesData data4 = fad;
if (data4 == null)
{
FileAttributesData.GetFileAttributes(Path.Combine(this.Directory, fileName), out data4);
}
if ((data4 != null) && ((data4.FileAttributes & FileAttributes.Directory) != 0))
{
flag2 = true;
}
}
if ((this._ignoreSubdirChange && ((action == FileAction.Removed) || (action == FileAction.RenamedOldName))) && (fileName != null))
{
string str5 = Path.Combine(this.Directory, fileName);
if (!HttpRuntime.FileChangesMonitor.IsDirNameMonitored(str5, fileName))
{
flag2 = true;
}
}
if ((list != null) && !flag2)
{
lock (s_notificationQueue.SyncRoot)
{
int num = 0;
int count = list.Count;
while (num < count)
{
bool flag3;
FileMonitorTarget target = (FileMonitorTarget)list[num];
if (((action != FileAction.Added) && (action != FileAction.Modified)) || (fad == null))
{
flag3 = true;
}
else if (action == FileAction.Added)
{
flag3 = this.IsChangeAfterStartMonitoring(fad, target, utcCompletion);
}
else if (utcCompletion == minValue)
{
flag3 = error != FileAction.Modified;
}
else if (attributes == null)
{
flag3 = true;
}
else if ((dacl == null) || (dacl != buffer2))
{
flag3 = true;
}
else
{
flag3 = this.IsChangeAfterStartMonitoring(fad, target, utcCompletion);
}
if (flag3)
{
s_notificationQueue.Enqueue(new NotificationQueueItem(target.Callback, action, target.Alias));
}
num++;
}
}
if (((s_notificationQueue.Count > 0) && (s_inNotificationThread == 0)) && (Interlocked.Exchange(ref s_inNotificationThread, 1) == 0))
{
WorkItem.PostInternal(s_notificationCallback);
}
}
}
}
catch (Exception)
{
}
}
