sdk/fidl/fuchsia.component.decl/events.fidl

// Copyright 2021 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
library fuchsia.component.decl;

/// The maximum number of EventSubscriptions in an EventStream.
const MAX_NUM_EVENT_STREAM_SUBSCRIPTIONS uint64 = 100;

/// Describes the consumption mode of an event.
type EventMode = strict enum {
    /// The event source dispatches the event and doesn't wait for the listener
    /// to handle it.
    ASYNC = 0;

    /// The event source awaits the listener to notify it that it's done handling the event.
    SYNC = 1;
};

/// Indicates the event name to subscribe to with a given event mode.
type EventSubscription = table {
    // The event names to subscribe to.
    1: event_name name;
    /// The event mode with which to subscribe to the event names above.
    2: mode EventMode;
};