github.com/looshlee/beatles@v0.0.0-20220727174639-742810ab631c/pkg/cleanup/cleanup.go (about)

     1  // Copyright 2018-2019 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 cleanup
    16  
    17  import (
    18  	"sync"
    19  )
    20  
    21  // DeferTerminationCleanupFunction will execute the given function `f` when the
    22  // channel `ch` is closed.
    23  // The given waitGroup will be added with a delta +1 and once the function
    24  // `f` returns from its execution that same waitGroup will signalize function
    25  // `f` is completed.
    26  func DeferTerminationCleanupFunction(wg *sync.WaitGroup, ch <-chan struct{}, f func()) {
    27  	wg.Add(1)
    28  	go func() {
    29  		defer wg.Done()
    30  		<-ch
    31  		f()
    32  	}()
    33  }