68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
//go:build !llgo
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// +build !llgo
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/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package async
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import "sync"
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func Async[T any](fn func(func(T))) Future[T] {
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return func(chain func(T)) {
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go fn(chain)
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}
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}
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// -----------------------------------------------------------------------------
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func Race[T1 any](futures ...Future[T1]) Future[T1] {
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return Async(func(resolve func(T1)) {
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ch := make(chan T1)
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for _, future := range futures {
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future := future
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future(func(v T1) {
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defer func() {
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// Avoid panic when the channel is closed.
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_ = recover()
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}()
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ch <- v
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})
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}
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v := <-ch
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close(ch)
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resolve(v)
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})
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}
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func All[T1 any](futures ...Future[T1]) Future[[]T1] {
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return Async(func(resolve func([]T1)) {
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n := len(futures)
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results := make([]T1, n)
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wg := sync.WaitGroup{}
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wg.Add(n)
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for i, future := range futures {
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i := i
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future(func(v T1) {
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results[i] = v
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wg.Done()
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})
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}
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wg.Wait()
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resolve(results)
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})
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}
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