DispatchSource.ReadMonitor Class

Definition

public class DispatchSource.ReadMonitor : CoreFoundation.DispatchSource

type DispatchSource.ReadMonitor = class
    inherit DispatchSource

Inheritance

Object

DispatchObject

DispatchSource

DispatchSource.ReadMonitor

Inheritance

Object

NativeObject

DispatchObject

DispatchSource

DispatchSource.ReadMonitor

Remarks

The data returned by BytesAvailable is an estimated number of bytes available to be read from the descriptor. This estimate should be treated as a suggested minimum read buffer size.

There are no guarantees that a complete read of this size will be performed.

Users of this source type are strongly encouraged to perform non-blocking I/O and handle any truncated reads or error conditions that may occur.

var stream = File.OpenRead ("Demo.txt");

// The the unix file handle
var safeHandle = stream.SafeFileHandle;
IntPtr descriptor = safeHandle.DangerousGetHandle ();
int fileDescriptor = descriptor.ToInt32 ();

dispatchSource = new DispatchSource.ReadMonitor (fileDescriptor, DispatchQueue.MainQueue);

dispatchSource.SetRegistrationHandler (() => {
    Console.WriteLine ("Read monitor registered");
});

dispatchSource.SetEventHandler (() => {
    Console.WriteLine ("Read monitor: was opened in write mode")
    dispatchSource.Cancel ();
    stream.Close ();
});

dispatchSource.SetCancelHandler (() => {
    Console.WriteLine ("Read monitor cancelled");
});

dispatchSource.Resume ();

Constructors

Properties

Methods

Applies to