SC::AsyncSocketAccept Struct Reference

Starts a socket accept operation, obtaining a new socket from a listening socket. More...

#include <Async.h>

Inheritance diagram for SC::AsyncSocketAccept:

Classes
struct	CompletionData
	Completion data for AsyncSocketAccept. More...
struct	Result
	Callback result for AsyncSocketAccept. More...

Public Member Functions
SC::Result	start (AsyncEventLoop &eventLoop, const SocketDescriptor &socketDescriptor)
	Starts a socket accept operation, that returns a new socket connected to the given listening endpoint. More...
Public Member Functions inherited from SC::AsyncRequest
void	setDebugName (const char *newDebugName)
AsyncEventLoop *	getEventLoop () const
	Get the event loop associated with this AsyncRequest. More...
void	cacheInternalEventLoop (AsyncEventLoop &loop)
	Caches the event loop associated with this AsyncRequest. More...
	AsyncRequest (Type type)
	Constructs a free async request of given type. More...
Result	stop ()
	Stops the async operation. More...
bool	isFree () const

Public Attributes
Function< void(Result &)>	callback
	Called when a new socket has been accepted. More...
Public Attributes inherited from SC::AsyncRequest
AsyncRequest *	next = nullptr
AsyncRequest *	prev = nullptr

Friends
struct	AsyncEventLoop

Additional Inherited Members
Public Types inherited from SC::AsyncRequest
enum class	Type : uint8_t {   LoopTimeout ,   LoopWakeUp ,   LoopWork ,   ProcessExit ,   SocketAccept ,   SocketConnect ,   SocketSend ,   SocketReceive ,   SocketClose ,   FileRead ,   FileWrite ,   FileClose ,   FilePoll }
	Type of async request. More...
Protected Member Functions inherited from SC::AsyncRequest
Result	validateAsync ()
Result	queueSubmission (AsyncEventLoop &eventLoop)
Result	queueSubmission (AsyncEventLoop &eventLoop, ThreadPool &threadPool, AsyncTask &task)
Protected Attributes inherited from SC::AsyncRequest
AsyncEventLoop *	eventLoop = nullptr
AsyncTask *	asyncTask = nullptr

Detailed Description

Starts a socket accept operation, obtaining a new socket from a listening socket.

The callback is called with a new socket connected to the given listening endpoint will be returned.
Socket library can be used to create a Socket but the socket should be created with SC::SocketFlags::NonBlocking and associated to the event loop with SC::AsyncEventLoop::associateExternallyCreatedTCPSocket.
Alternatively SC::AsyncEventLoop::createAsyncTCPSocket creates and associates the socket to the loop.

Note

To continue accepting new socket SC::AsyncResult::reactivateRequest must be called.

// Assuming an already created (and running) AsyncEventLoop named eventLoop
// ...
// Create a listening socket
constexpr uint32_t numWaitingConnections = 2;
SocketDescriptor   serverSocket;
uint16_t           tcpPort = 5050;
SocketIPAddress    nativeAddress;
SC_TRY(nativeAddress.fromAddressPort("127.0.0.1", tcpPort));
SC_TRY(eventLoop.createAsyncTCPSocket(nativeAddress.getAddressFamily(), serverSocket));
SocketServer server(serverSocket);
SC_TRY(server.bind(nativeAddress));
SC_TRY(server.listen(numWaitingConnections));
// Accept connect for new clients
AsyncSocketAccept accept;
accept.callback = [&](AsyncSocketAccept::Result& res)
{
    SocketDescriptor client;
    if(res.moveTo(client))
    {
        // ...do something with new client
        console.printLine("New client connected!");
        res.reactivateRequest(true); // We want to receive more clients
    }
};
SC_TRY(accept.start(eventLoop, serverSocket));
// ... at some later point
// Stop accepting new clients
SC_TRY(accept.stop());

Member Function Documentation

start()

SC::Result SC::AsyncSocketAccept::start	(	AsyncEventLoop &	eventLoop,
		const SocketDescriptor &	socketDescriptor
	)

Starts a socket accept operation, that returns a new socket connected to the given listening endpoint.

Note

SocketDescriptor must be created with async flags and already bound and listening.

Parameters

eventLoop	The event loop where queuing this async request
socketDescriptor	The socket that will receive the accepted client.

Returns

Valid Result if the request has been successfully queued

Member Data Documentation

callback

Function<void(Result&)> SC::AsyncSocketAccept::callback

Called when a new socket has been accepted.

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The documentation for this struct was generated from the following file:

• Async.h