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Notifier

Notifies subscribing callback methods about an event synchronously.

Declaration

namespace bdn {
    template<class... Arguments>
    class Notifier
}

Types

• using Subscription = size_t

  An ID referencing a specific subscription.

• using Target = std::function<void(Arguments...)>

  The type of a callback.

Subscribing to a Notifier

• Subscription subscribe(Target target)

  Subscribes the function specified by target to the notifier and returns a Subscription value. The returned Subscription may be persisted by the caller to later unsubscribe from the subscription again.

• Notifier<Arguments...> operator+=(Target target)

  Convenience for adding a new subscription by using operator +=. If you need to unsubscribe the subscriber later on, use subscribe instead.

Unsubscribing from a Notifier

• void unsubscribe(Subscription subscription)

  Unsubscribe the given subscription.

• void unsubscribeAll()

  Unsubscribe all subscriptions.

Note

It is safe to unsubscribe during a notify() call

Notifying Subscribers

• void notify(Arguments... arguments)

  Notifies all subscribers. Passes the given arguments to each subscriber.

Source

Notifier.h