async: work both go and llgo

x/async/executor_llgo.go

@@ -0,0 +1,63 @@
+//go:build llgo
+// +build llgo
+
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * 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 async
+
+import (
+	"unsafe"
+
+	"github.com/goplus/llgo/c/libuv"
+	"github.com/goplus/llgo/c/pthread"
+)
+
+var execKey pthread.Key
+
+func init() {
+	execKey.Create(nil)
+}
+
+type Executor struct {
+	L *libuv.Loop
+}
+
+func Exec() *Executor {
+	v := execKey.Get()
+	if v == nil {
+		panic("async.Exec: no executor")
+	}
+	return (*Executor)(v)
+}
+
+func setExec(e *Executor) {
+	execKey.Set(unsafe.Pointer(e))
+}
+
+func (e *Executor) Run() {
+	e.L.Run(libuv.RUN_DEFAULT)
+}
+
+func Run(fn func()) {
+	loop := libuv.LoopNew()
+	exec := &Executor{loop}
+	setExec(exec)
+	fn()
+	exec.Run()
+	loop.Close()
+	setExec(nil)
+}