120 lines
3.2 KiB
Go
120 lines
3.2 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 cl
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import (
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"go/types"
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"strings"
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llssa "github.com/goplus/llgo/ssa"
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"golang.org/x/tools/go/ssa"
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)
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// TODO(lijie): need more generics, shouldn't limit to async.Promise
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func promiseType(ty types.Type) (types.Type, bool) {
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// ty is a generic type, so we need to check the package path and type name
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if ptrTy, ok := ty.(*types.Pointer); ok {
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ty = ptrTy.Elem()
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if ty, ok := ty.(*types.Named); ok {
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if ty.Obj().Pkg() == nil {
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return nil, false
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}
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if ty.Obj().Pkg().Path() == "github.com/goplus/llgo/x/async" && ty.Obj().Name() == "Promise" {
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return ty, true
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}
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}
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}
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return nil, false
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}
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// check function return async.Promise[T]
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// TODO(lijie): make it generic
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func isAsyncFunc(sig *types.Signature) bool {
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r := sig.Results()
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if r.Len() != 1 {
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return false
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}
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ty := r.At(0).Type()
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_, ok := promiseType(ty)
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return ok
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}
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func (p *context) coAwait(b llssa.Builder, args []ssa.Value) llssa.Expr {
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if !isAsyncFunc(b.Func.RawType().(*types.Signature)) {
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panic("coAwait(promise *T) T: invalid context")
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}
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if len(args) == 1 {
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// promise := p.compileValue(b, args[0])
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b.Unreachable()
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// return b.CoroutineAwait(promise)
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}
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panic("coAwait(promise *T) T: invalid arguments")
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}
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func (p *context) coSuspend(b llssa.Builder, final llssa.Expr) {
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b.CoSuspend(b.AsyncToken(), final)
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}
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func (p *context) coDone(b llssa.Builder, args []ssa.Value) llssa.Expr {
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if len(args) != 1 {
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panic("coDone(promise *T): invalid arguments")
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}
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hdl := p.compileValue(b, args[0])
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return b.CoDone(hdl)
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}
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func (p *context) coResume(b llssa.Builder, args []ssa.Value) {
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if len(args) == 1 {
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hdl := p.compileValue(b, args[0])
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b.CoResume(hdl)
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}
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}
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func (p *context) coReturn(b llssa.Builder, args []ssa.Value) {
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cargs := make([]llssa.Expr, len(args))
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for i, arg := range args {
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cargs[i] = p.compileValue(b, arg)
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}
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b.CoReturn(cargs...)
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}
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func (p *context) coYield(b llssa.Builder, fn *ssa.Function, args []ssa.Value) {
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typ := fn.Signature.Recv().Type()
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mthds := p.goProg.MethodSets.MethodSet(typ)
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// TODO(lijie): make llgo instruction callable (e.g. llgo.yield)
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var setValue *ssa.Function
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for i := 0; i < mthds.Len(); i++ {
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m := mthds.At(i)
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if ssaMthd := p.goProg.MethodValue(m); ssaMthd != nil {
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if ssaMthd.Name() == "setValue" || strings.HasPrefix(ssaMthd.Name(), "setValue[") {
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setValue = ssaMthd
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break
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}
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}
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}
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if setValue == nil {
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panic("coYield(): not found method setValue")
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}
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value := p.compileValue(b, args[1])
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setValueFn, _, _ := p.funcOf(setValue)
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b.CoYield(setValueFn, value)
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}
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func (p *context) coRun(b llssa.Builder, args []ssa.Value) {
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panic("coRun(): not implemented")
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}
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