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use native promise constructor

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ekibun
2020-09-22 00:32:17 +08:00
parent 15ae27d7b0
commit 29c2b04a36
11 changed files with 128 additions and 71 deletions
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49
lib/wrapper.dart
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@@ -3,13 +3,14 @@
* @Author: ekibun
* @Date: 2020-09-19 22:07:47
* @LastEditors: ekibun
* @LastEditTime: 2020-09-21 13:56:53
* @LastEditTime: 2020-09-22 00:27:54
*/
import 'dart:async';
import 'dart:ffi';
import 'dart:typed_data';
import 'package:ffi/ffi.dart';
import 'package:flutter/cupertino.dart';
import 'ffi.dart';
@@ -114,7 +115,20 @@ String parseJSException(Pointer ctx, {Pointer e}) {
Pointer dartToJs(Pointer ctx, dynamic val, {Map<dynamic, dynamic> cache}) {
if (val is Future) {
return runtimeOpaques[jsGetRuntime(ctx)]?.futureToPromise(val);
var resolvingFunc = allocate<Uint8>(count: sizeOfJSValue * 2);
var resolvingFunc2 = Pointer.fromAddress(resolvingFunc.address + sizeOfJSValue);
var ret = jsNewPromiseCapability(ctx, resolvingFunc);
var res = jsToDart(ctx, resolvingFunc);
var rej = jsToDart(ctx, resolvingFunc2);
jsFreeValue(ctx, resolvingFunc);
jsFreeValue(ctx, resolvingFunc2);
free(resolvingFunc);
val.then((value) {
res(value);
}, onError: (e, stack) {
rej(e.toString() + "\n" + stack.toString());
});
return ret;
}
if (cache == null) cache = Map();
if (val is bool) return jsNewBool(ctx, val ? 1 : 0);
@@ -251,37 +265,6 @@ dynamic jsToDart(Pointer ctx, Pointer val, {Map<int, dynamic> cache}) {
Pointer jsNewContextWithPromsieWrapper(Pointer rt) {
var ctx = jsNewContext(rt);
var jsPromiseCtor = jsEval(
ctx,
"""
() => {
const __resolver = {};
const __ret = new Promise((res, rej) => {
__resolver.__res = res;
__resolver.__rej = rej;
});
__ret.__res = __resolver.__res;
__ret.__rej = __resolver.__rej;
return __ret;
}
""",
"<future>",
JSEvalType.GLOBAL);
var promiseCtor = JSRefValue(ctx, jsPromiseCtor);
jsFreeValue(ctx, jsPromiseCtor);
deleteJSValue(jsPromiseCtor);
runtimeOpaques[rt].futureToPromise = (future) {
var ctor = promiseCtor.val;
if (ctor == null) throw Exception("Runtime has been released!");
var jsPromise = jsCall(ctx, ctor, null, List());
var promise = jsToDart(ctx, jsPromise);
future.then((value) {
promise['__res'](value);
}).catchError((err) {
promise['__rej'](err);
});
return jsPromise;
};
var jsPromiseWrapper = jsEval(
ctx,
"""