github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/store/util/functions/all.go (about)

     1  // Copyright 2019 Dolthub, Inc.
     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  // This file incorporates work covered by the following copyright and
    16  // permission notice:
    17  //
    18  // Copyright 2016 Attic Labs, Inc. All rights reserved.
    19  // Licensed under the Apache License, version 2.0:
    20  // http://www.apache.org/licenses/LICENSE-2.0
    21  
    22  package functions
    23  
    24  import (
    25  	"sync"
    26  	"sync/atomic"
    27  )
    28  
    29  // All runs all functions in |fs| in parallel, and returns when all functions have returned.
    30  func All(fs ...func() error) error {
    31  	var res atomic.Value
    32  	wg := &sync.WaitGroup{}
    33  	wg.Add(len(fs))
    34  	for _, f := range fs {
    35  		capf := f
    36  		go func() {
    37  			defer wg.Done()
    38  			if err := capf(); err != nil {
    39  				res.Store(err)
    40  			}
    41  		}()
    42  	}
    43  	wg.Wait()
    44  	if err := res.Load(); err != nil {
    45  		return err.(error)
    46  	}
    47  	return nil
    48  }