58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
/*
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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 (
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"sync/atomic"
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)
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func Await[T1 any](call Future[T1]) (ret T1) {
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return Run(call)
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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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done := atomic.Bool{}
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for _, future := range futures {
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future(func(v T1) {
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if !done.Swap(true) {
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resolve(v)
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}
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})
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}
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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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var done uint32
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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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if atomic.AddUint32(&done, 1) == uint32(n) {
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resolve(results)
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}
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})
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}
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})
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}
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