bidirectional communication

imports.go

@@ -98,7 +98,9 @@ func getRandomData(ctx unsafe.Pointer, sp int32) {
 
 //export stringVal
 func stringVal(ctx unsafe.Pointer, sp int32) {
-	panic("stringVal")
+	b := getBridge(ctx)
+	str := b.loadString(sp + 8)
+	b.storeValue(sp+24, str)
 }
 
 //export valueGet
@@ -212,17 +214,20 @@ func valuePrepareString(ctx unsafe.Pointer, sp int32) {
 	val := b.loadValue(sp + 8)
 	var str string
 	if val != nil {
-		str = val.(string)
+		str = fmt.Sprint(val)
 	}
 
 	b.storeValue(sp+16, str)
 	b.setInt64(sp+24, int64(len(str)))
-	fmt.Println("valuePrepareString", val, str)
+	fmt.Println("valuePrepareString", val)
 }
 
 //export valueLoadString
 func valueLoadString(ctx unsafe.Pointer, sp int32) {
-	panic("valueLoadString")
+	b := getBridge(ctx)
+	str := b.loadValue(sp + 8).(string)
+	sl := b.loadSlice(sp + 16)
+	copy(sl, str)
 }
 
 //export scheduleTimeoutEvent

simple/caller/main.go

@@ -16,7 +16,7 @@ func main() {
 	init, done := make(chan bool), make(chan error)
 	go b.Run(init, done)
 	<-init
-	res, err := b.CallFunc("printWasm", &[]interface{}{"success call"})
+	res, err := b.CallFunc("printWasm", &[]interface{}{"Hello from Go"})
 	fmt.Println(res, err)
 	err = <-done
 	fmt.Println("wasm exited", err)

simple/prog/main.go

@@ -9,17 +9,16 @@ import (
 
 // TODO: log seems to cause an issue
 func printWasm(this js.Value, v []js.Value) interface{} {
-	fmt.Println("Hello from WASM", v)
+	fmt.Println(v[0].String())
-	return nil
+	return "Hello from WASM"
 }
 
 func main() {
 	ch := make(chan bool)
-	//fmt.Println("WASM Go Initialized")
+	fmt.Println("WASM-Go Initialized")
 
 	// register functions
 	fun := js.FuncOf(printWasm)
 	js.Global().Set("printWasm", fun)
-	//fmt.Println("Done...")
 	<-ch
 }