171 lines
3.7 KiB
Go
171 lines
3.7 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 io
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import (
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_ "unsafe"
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"time"
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)
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const (
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LLGoPackage = "decl"
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)
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type Void = [0]byte
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// -----------------------------------------------------------------------------
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type AsyncCall[OutT any] interface {
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Await(timeout ...time.Duration) (ret OutT, err error)
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Chan() <-chan OutT
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EnsureDone()
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}
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// llgo:link AsyncCall.Await llgo.await
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func Await[OutT any](call AsyncCall[OutT], timeout ...time.Duration) (ret OutT, err error) {
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return
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}
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//go:linkname Timeout llgo.timeout
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func Timeout(time.Duration) (ret AsyncCall[Void])
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func TimeoutCompiled(d time.Duration) *PromiseImpl[Void] {
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P := &PromiseImpl[Void]{}
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P.Func = func(resolve func(Void, error)) {
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go func() {
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time.Sleep(d)
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resolve(Void{}, nil)
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}()
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}
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return P
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}
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// llgo:link Race llgo.race
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func Race[OutT any](acs ...AsyncCall[OutT]) (ret *PromiseImpl[OutT]) {
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return
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}
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func All[OutT any](acs []AsyncCall[OutT]) (ret *PromiseImpl[[]OutT]) {
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return nil
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}
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// llgo:link Await2 llgo.await
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func Await2[OutT1, OutT2 any](
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ac1 AsyncCall[OutT1], ac2 AsyncCall[OutT2],
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timeout ...time.Duration) (ret1 OutT1, ret2 OutT2, err error) {
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return
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}
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type Await2Result[T1 any, T2 any] struct {
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V1 T1
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V2 T2
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Err error
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}
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func Await2Compiled[OutT1, OutT2 any](
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ac1 AsyncCall[OutT1], ac2 AsyncCall[OutT2],
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timeout ...time.Duration) (ret *PromiseImpl[Await2Result[OutT1, OutT2]]) {
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return
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}
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// llgo:link Await3 llgo.await
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func Await3[OutT1, OutT2, OutT3 any](
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ac1 AsyncCall[OutT1], ac2 AsyncCall[OutT2], ac3 AsyncCall[OutT3],
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timeout ...time.Duration) (ret1 OutT1, ret2 OutT2, ret3 OutT3, err error) {
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return
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}
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type Await3Result[T1 any, T2 any, T3 any] struct {
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V1 T1
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V2 T2
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V3 T3
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Err error
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}
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func Await3Compiled[OutT1, OutT2, OutT3 any](
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ac1 AsyncCall[OutT1], ac2 AsyncCall[OutT2], ac3 AsyncCall[OutT3],
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timeout ...time.Duration) (ret *PromiseImpl[Await3Result[OutT1, OutT2, OutT3]]) {
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return
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}
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func Run(ac AsyncCall[Void]) {
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p := ac.(*PromiseImpl[Void])
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p.Resume()
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<-ac.Chan()
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}
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// -----------------------------------------------------------------------------
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type Promise[OutT any] func(OutT, error)
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// llgo:link Promise.Await llgo.await
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func (p Promise[OutT]) Await(timeout ...time.Duration) (ret OutT, err error) {
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return
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}
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func (p Promise[OutT]) Chan() <-chan OutT {
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return nil
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}
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func (p Promise[OutT]) EnsureDone() {
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}
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// -----------------------------------------------------------------------------
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type PromiseImpl[TOut any] struct {
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Func func(resolve func(TOut, error))
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Value TOut
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Err error
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Prev int
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Next int
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c chan TOut
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}
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func (p *PromiseImpl[TOut]) Resume() {
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p.Func(func(v TOut, err error) {
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p.Value = v
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p.Err = err
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})
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}
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func (p *PromiseImpl[TOut]) EnsureDone() {
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if p.Next == -1 {
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panic("Promise already done")
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}
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}
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func (p *PromiseImpl[TOut]) Chan() <-chan TOut {
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if p.c == nil {
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p.c = make(chan TOut, 1)
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p.Func(func(v TOut, err error) {
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p.Value = v
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p.Err = err
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p.c <- v
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})
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}
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return p.c
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}
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func (p *PromiseImpl[TOut]) Await(timeout ...time.Duration) (ret TOut, err error) {
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panic("should not called")
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}
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// -----------------------------------------------------------------------------
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