DispatchSource.VnodeMonitor Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Sources of this type monitor the virtual filesystem nodes for state changes.
public class DispatchSource.VnodeMonitor : CoreFoundation.DispatchSourcetype DispatchSource.VnodeMonitor = class
inherit DispatchSource- Inheritance
Remarks
var stream = File.Create ("Demo.txt");
// Get the underlying Unix file descriptor
var safeHandle = stream.SafeFileHandle;
IntPtr descriptor = safeHandle.DangerousGetHandle ();
int fileDescriptor = descriptor.ToInt32 ();
var dispatchSource = new DispatchSource.VnodeMonitor (
fileDescriptor,
VnodeMonitorKind.Delete | VnodeMonitorKind.Extend | VnodeMonitorKind.Write,
DispatchQueue.MainQueue
);
dispatchSource.SetRegistrationHandler (() => {
Console.WriteLine ("Vnode monitor registered");
});
dispatchSource.SetEventHandler (() => {
var observedEvents = dispatchSource.ObservedEvents;
Console.WriteLine ("Vnode monitor event for file: {0}", observedEvents);
dispatchSource.Cancel ();
stream.Close ();
});
dispatchSource.SetCancelHandler (() => {
Console.WriteLine (textView, "Vnode monitor cancelled");
});
dispatchSource.Resume ();
Constructors
| Name | Description |
|---|---|
| DispatchSource.VnodeMonitor(Int32, VnodeMonitorKind, DispatchQueue) |
Creates a VNode monitor for the specified file descriptor to monitor the specified set of events on it. |
| DispatchSource.VnodeMonitor(IntPtr, Boolean) | |
| DispatchSource.VnodeMonitor(IntPtr) | |
| DispatchSource.VnodeMonitor(String, VnodeMonitorKind, DispatchQueue) |
Creates a VNode monitor for the specified file path to monitor the specified set of events on it. |
Properties
| Name | Description |
|---|---|
| FileDescriptor |
File descriptor that is being monitored |
| Handle | (Inherited from DisposableObject) |
| IsCanceled |
Determine whether the specified source has been canceled. (Inherited from DispatchSource) |
| ObservedEvents |
Events that were observed on the file. |
| Owns | (Inherited from DisposableObject) |
Methods
| Name | Description |
|---|---|
| Activate() | (Inherited from DispatchObject) |
| Cancel() |
Asynchronously cancels the dispatch source. (Inherited from DispatchSource) |
| ClearHandle() | (Inherited from DisposableObject) |
| Dispose() | (Inherited from DisposableObject) |
| Dispose(Boolean) | |
| Equals(Object) | (Inherited from DisposableObject) |
| GetCheckedHandle() | (Inherited from DisposableObject) |
| GetHashCode() | (Inherited from DisposableObject) |
| InitializeHandle(NativeHandle) | (Inherited from DisposableObject) |
| Release() | (Inherited from DispatchObject) |
| Resume() |
Resumes the dispatch source. (Inherited from DispatchSource) |
| Retain() | (Inherited from DispatchObject) |
| SetCancelHandler(Action) |
Provides a cancellation handler (Inherited from DispatchSource) |
| SetEventHandler(Action) |
Specified a handler to execute when events are received on the dispatch source. (Inherited from DispatchSource) |
| SetRegistrationHandler(Action) |
Provides a registration handler (Inherited from DispatchSource) |
| SetTargetQueue(DispatchQueue) | (Inherited from DispatchObject) |
| Suspend() |
Suspends the dispatch source. (Inherited from DispatchSource) |
Extension Methods
| Name | Description |
|---|---|
| GetHandle(INativeObject) | |
| GetNonNullHandle(INativeObject, String) | |