class CancelableCallback

CancelableCallback is a wrapper around fit::function that allows the

cancellation of a callback. CancelableCallback takes a reference on the

wrapped callback until this object is destroyed or Reset()/Cancel() are

called.

THREAD-SAFETY:

CancelableCallback objects must be created on, posted to, canceled on, and

destroyed on the same thread.

EXAMPLE USAGE:

void MyTimeoutCallback(std::string message) {

FX_LOGS(INFO)

<

<

"Timeout has expired: "

<

<

message

}

CancelableClosure cancelable(

std::bind(

&MyTimeoutCallback

, "Drinks at Foo Bar!"));

my_task_runner->PostDelayedTask(cancelable.callback(),

TimeDelta::FromSeconds(5));

...

cancelable.Cancel(); // Assuming this happens before the 5 seconds expire.