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web: Call async callbacks with WAForth object

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This commit is contained in:
Remko Tronçon 2022-05-14 08:51:25 +02:00
parent 3c40468de6
commit 5773010948
1 changed files with 5 additions and 11 deletions
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16
src/web/waforth.ts
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@ -47,7 +47,7 @@ function saveString(s: string, memory: WebAssembly.Memory, addr: number) {
class WAForth {
core?: WebAssembly.Instance;
#buffer?: number[];
#fns: Record<string, (v: Stack) => void>;
#fns: Record<string, (f: WAForth) => void>;
/**
* Callback that is called when a character needs to be emitted.
@ -238,22 +238,22 @@ class WAForth {
* When an SCALL is done with `name` on the top of the stack, `fn` will be called (with the name popped off the stack).
* Use `stack` to pop parameters off the stack, and push results back on the stack.
*/
bind(name: string, fn: (stack: Stack) => void) {
bind(name: string, fn: (f: WAForth) => void) {
this.#fns[name] = fn;
}
/**
* Bind `name` to SCALL in Forth.
* Bind async `name` to SCALL in Forth.
*
* When an SCALL is done with `name` on the top of the stack, `fn` will be called (with the name popped off the stack).
* Expects an execution token on the top of the stack, which will be called when the async callback is finished.
* The execution parameter will be called with the success flag set.
*/
bindAsync(name: string, fn: () => Promise<void>) {
bindAsync(name: string, fn: (f: WAForth) => Promise<void>) {
this.#fns[name] = async () => {
const cbxt = this.pop();
try {
await fn();
await fn(this);
this.push(-1);
} catch (e) {
console.error(e);
@ -266,10 +266,4 @@ class WAForth {
}
}
export interface Stack {
push(n: number): void;
pop(): number;
popString(): string;
}
export default WAForth;