mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-23 20:26:39 +00:00
33 lines
871 B
Go
33 lines
871 B
Go
|
/*
|
||
|
|
*
|
||
|
|
* Copyright 2022 gRPC authors.
|
||
|
|
*
|
||
|
|
* 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 grpcsync
|
||
|
|
|
||
|
|
import (
|
||
|
|
"sync"
|
||
|
|
)
|
||
|
|
|
||
|
|
// OnceFunc returns a function wrapping f which ensures f is only executed
|
||
|
|
// once even if the returned function is executed multiple times.
|
||
|
|
func OnceFunc(f func()) func() {
|
||
|
|
var once sync.Once
|
||
|
|
return func() {
|
||
|
|
once.Do(f)
|
||
|
|
}
|
||
|
|
}
|