(Lianja) Async Accept Socket Connection

Demonstrates how to get the connected client socket after accepting a connection asynchronously.

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// This example assumes the Chilkat Socket API to have been previously unlocked.
// See Socket Unlock Sample for sample code.

loListenSocket = createobject("CkSocket")

// Bind to a port and listen.
// This example will listen at port 5555 and allows for a backlog
// of 25 pending connection requests.
llSuccess = loListenSocket.BindAndListen(5555,25)
if (llSuccess <> .T.) then
    ? loListenSocket.LastErrorText
    release loListenSocket
    return
endif

// Start a background task to accept an incoming connection ...
lnMaxWaitMs = 20000
loAcceptTask = loListenSocket.AcceptNextConnectionAsync(lnMaxWaitMs)
loAcceptTask.Run()

// ...
// ...
// ...

// Imagine at this point the task has completed successfully,
// and a connection was accepted.  Here's how to get the connected socket...
loConnectedClient = createobject("CkSocket")
llSuccess = loConnectedClient.LoadTaskResult(loAcceptTask)

// Here's how it works:  The AcceptNextConnection method would normally
// return a socket object when called synchronously.  When called asynchronously,
// it cannot do so because it returns the task object.  When the async method
// (running in a background thread) completes, the socket object that is the client
// connection is contained within the task object.
// 
// This can be generalized for any case where a Chilkat method returns an object.
// The async version of that method is such that the object returned in the background
// thread is contained within the task object.

// To get the result object, we create a new object instance of that type.
// In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
// method in all Chilkat classes that can be a return value of an async method call.
// The LoadTaskResult method transfers the returned object from the task to the caller.


release loListenSocket
release loConnectedClient