Starts a Timeout that is invoked only once after expiration (relative) time has passed. More...

#include <Async.h>

Inheritance diagram for SC::AsyncLoopTimeout:

Public Types
using	CompletionData = AsyncCompletionData

using	Result = AsyncResultOf<AsyncLoopTimeout, CompletionData>

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...

Public Member Functions
SC::Result	start (AsyncEventLoop &eventLoop, Time::Milliseconds relativeTimeout)
	Sets async request members and calls AsyncEventLoop::start.

Time::Absolute	getExpirationTime () const
	Gets computed absolute expiration time that determines when this timeout get executed.

Public Member Functions inherited from SC::AsyncRequest
void	setDebugName (const char *newDebugName)

AsyncEventLoop *	getEventLoop () const
	Get the event loop associated with this AsyncRequest.

void	cacheInternalEventLoop (AsyncEventLoop &loop)
	Caches the event loop associated with this AsyncRequest.

Result	setThreadPoolAndTask (ThreadPool &pool, AsyncTask &task)
	Sets the thread pool and task to use for this request.

void	resetThreadPoolAndTask ()
	Resets anything previously set with setThreadPoolAndTask.

	AsyncRequest (Type type)
	Constructs a free async request of given type.

Result	stop (Function< void(AsyncResult &)> *afterStopped=nullptr)
	Ask to stop current async operation.

bool	isFree () const
	Returns `true` if this request is free.

bool	isCancelling () const
	Returns `true` if this request is being cancelled.

bool	isActive () const
	Returns `true` if this request is active or being reactivated.

Type	getType () const
	Returns request type.

Result	start (AsyncEventLoop &loop)
	Shortcut for AsyncEventLoop::start.

Public Attributes
Function< void(Result &)>	callback
	Called after given expiration time since AsyncLoopTimeout::start has passed.

Time::Milliseconds	relativeTimeout
	First timer expiration (relative) time in milliseconds.

Public Attributes inherited from SC::AsyncRequest
AsyncRequest *	next = nullptr

AsyncRequest *	prev = nullptr

Friends
struct	AsyncEventLoop

Additional Inherited Members
Protected Member Functions inherited from SC::AsyncRequest
Result	checkState ()

void	queueSubmission (AsyncEventLoop &eventLoop)

Protected Attributes inherited from SC::AsyncRequest
AsyncEventLoop *	eventLoop = nullptr

AsyncTask *	asyncTask = nullptr

Detailed Description

Starts a Timeout that is invoked only once after expiration (relative) time has passed.

Note: For a periodic timeout, call AsyncLoopTimeout::Result::reactivateRequest(true) in the completion callback

// Create a timeout that will be called after 200 milliseconds
// AsyncLoopTimeout must be valid until callback is called
AsyncLoopTimeout timeout;
timeout.callback = [&](AsyncLoopTimeout::Result& res)
{
    console.print("My timeout has been called!");
    if (someCondition) // Optionally re-activate the timeout if needed
    {
        // Schedule the timeout callback to fire again 100 ms from now
        res.getAsync().relativeTimeout = Time::Milliseconds(100);
        res.reactivateRequest(true);
    }
};
// Start the timeout, that will be called 200 ms from now
SC_TRY(timeout.start(eventLoop, 200_ms));

Member Function Documentation

◆ getExpirationTime()

Time::Absolute SC::AsyncLoopTimeout::getExpirationTime ( ) const

inline

Gets computed absolute expiration time that determines when this timeout get executed.

◆ start()

SC::Result SC::AsyncLoopTimeout::start	(	AsyncEventLoop &	eventLoop,
		Time::Milliseconds	relativeTimeout )

Sets async request members and calls AsyncEventLoop::start.

Member Data Documentation

◆ callback

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

Called after given expiration time since AsyncLoopTimeout::start has passed.

◆ relativeTimeout

Time::Milliseconds SC::AsyncLoopTimeout::relativeTimeout

First timer expiration (relative) time in milliseconds.

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

Async.h

Public Types

Public Member Functions

Public Attributes

Friends