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context.go
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context.go
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// Copyright 2020 Authors of Cilium
//
// 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 contexthelpers
import (
"context"
"time"
)
type SuccessChan chan bool
// NewConditionalTimeoutContext returns a context which is cancelled when
// success is not reported within the specified timeout
func NewConditionalTimeoutContext(ctx context.Context, timeout time.Duration) (context.Context, context.CancelFunc, SuccessChan) {
ch := make(SuccessChan, 1)
c, cancel := context.WithCancel(ctx)
go func() {
select {
case success := <-ch:
if !success {
cancel()
return
}
case <-time.After(timeout):
cancel()
}
}()
return c, cancel, ch
}