"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.QuickJSAsyncContext = void 0;
const context_1 = require("./context");
const debug_1 = require("./debug");
const types_1 = require("./types");
/**
* Asyncified version of [[QuickJSContext]].
*
* *Asyncify* allows normally synchronous code to wait for asynchronous Promises
* or callbacks. The asyncified version of QuickJSContext can wait for async
* host functions as though they were synchronous.
*/
class QuickJSAsyncContext extends context_1.QuickJSContext {
/**
* Asyncified version of [[evalCode]].
*/
async evalCodeAsync(code, filename = "eval.js",
/** See [[EvalFlags]] for number semantics */
options) {
const detectModule = (options === undefined ? 1 : 0);
const flags = (0, types_1.evalOptionsToFlags)(options);
let resultPtr = 0;
try {
resultPtr = await this.memory
.newHeapCharPointer(code)
.consume((charHandle) => this.ffi.QTS_Eval_MaybeAsync(this.ctx.value, charHandle.value, filename, detectModule, flags));
}
catch (error) {
(0, debug_1.debugLog)("QTS_Eval_MaybeAsync threw", error);
throw error;
}
const errorPtr = this.ffi.QTS_ResolveException(this.ctx.value, resultPtr);
if (errorPtr) {
this.ffi.QTS_FreeValuePointer(this.ctx.value, resultPtr);
return { error: this.memory.heapValueHandle(errorPtr) };
}
return { value: this.memory.heapValueHandle(resultPtr) };
}
/**
* Similar to [[newFunction]].
* Convert an async host Javascript function into a synchronous QuickJS function value.
*
* Whenever QuickJS calls this function, the VM's stack will be unwound while
* waiting the async function to complete, and then restored when the returned
* promise resolves.
*
* Asyncified functions must never call other asyncified functions or
* `import`, even indirectly, because the stack cannot be unwound twice.
*
* See [Emscripten's docs on Asyncify](https://emscripten.org/docs/porting/asyncify.html).
*/
newAsyncifiedFunction(name, fn) {
return this.newFunction(name, fn);
}
}
exports.QuickJSAsyncContext = QuickJSAsyncContext;
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