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triggerable.go
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triggerable.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package futureevent
import (
"time"
)
// TriggerableEvent is an Event triggered by a method call.
type TriggerableEvent struct {
c chan time.Time
}
// NewTriggerableEvent creates a new TriggerableEvent.
func NewTriggerableEvent() *TriggerableEvent {
return &TriggerableEvent{make(chan time.Time, 1)}
}
// Trigger triggers the event.
func (e *TriggerableEvent) Trigger() {
e.c <- time.Now()
}
// Chan returns the event notifier channel.
func (e *TriggerableEvent) Chan() <-chan time.Time {
return e.c
}
// Cancel makes e no longer triggerable.
func (e *TriggerableEvent) Cancel() {
drainOneTime(e.c)
close(e.c)
}