github.com/fafucoder/cilium@v1.6.11/pkg/contexthelpers/context.go (about)

     1  // Copyright 2020 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package contexthelpers
    16  
    17  import (
    18  	"context"
    19  	"time"
    20  )
    21  
    22  type SuccessChan chan bool
    23  
    24  // NewConditionalTimeoutContext returns a context which is cancelled when
    25  // success is not reported within the specified timeout
    26  func NewConditionalTimeoutContext(ctx context.Context, timeout time.Duration) (context.Context, context.CancelFunc, SuccessChan) {
    27  	ch := make(SuccessChan)
    28  	c, cancel := context.WithCancel(ctx)
    29  
    30  	go func() {
    31  		select {
    32  		case success := <-ch:
    33  			if !success {
    34  				cancel()
    35  				return
    36  			}
    37  		case <-time.After(timeout):
    38  			cancel()
    39  		}
    40  	}()
    41  
    42  	return c, cancel, ch
    43  }