1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
// Do not add flatbuffer dependencies to this module.
// TODO(ry) Currently ErrorKind enum is defined in FlatBuffers. Therefore
// we must still reference the msg_generated.ts. This should be removed!
import { ErrorKind } from "gen/cli/msg_generated";
import * as util from "./util";
import { TextEncoder, TextDecoder } from "./text_encoding";
import { core } from "./core";
import { DenoError } from "./errors";
// eslint-disable-next-line @typescript-eslint/no-explicit-any
type Ok = any;
interface JsonError {
kind: ErrorKind;
message: string;
}
interface JsonResponse {
ok?: Ok;
err?: JsonError;
promiseId?: number; // only present in async mesasges.
}
const promiseTable = new Map<number, util.Resolvable<number>>();
let _nextPromiseId = 1;
function nextPromiseId(): number {
return _nextPromiseId++;
}
function decode(ui8: Uint8Array): JsonResponse {
const s = new TextDecoder().decode(ui8);
return JSON.parse(s) as JsonResponse;
}
function encode(args: object): Uint8Array {
const s = JSON.stringify(args);
return new TextEncoder().encode(s);
}
function toDenoError(err: JsonError): DenoError<ErrorKind> {
return new DenoError(err.kind, err.message);
}
export function asyncMsgFromRust(opId: number, res: Uint8Array): void {
const { ok, err, promiseId } = decode(res);
const promise = promiseTable.get(promiseId!)!;
if (!promise) {
throw Error(`Async op ${opId} had bad promiseId`);
}
promiseTable.delete(promiseId!);
if (err) {
promise.reject(toDenoError(err));
} else if (ok) {
promise.resolve(ok);
} else {
util.unreachable();
}
}
export function sendSync(
opId: number,
args: object = {},
zeroCopy?: Uint8Array
): Ok {
const argsUi8 = encode(args);
const res = core.dispatch(opId, argsUi8, zeroCopy);
if (!res) {
return;
}
const { ok, err, promiseId } = decode(res);
util.assert(!promiseId);
if (err) {
throw toDenoError(err);
}
return ok;
}
export function sendAsync(
opId: number,
args: object = {},
zeroCopy?: Uint8Array
): Promise<Ok> {
const promiseId = nextPromiseId();
args = Object.assign(args, { promiseId });
const argsUi8 = encode(args);
const promise = util.createResolvable<Ok>();
promiseTable.set(promiseId, promise);
const r = core.dispatch(opId, argsUi8, zeroCopy);
util.assert(!r);
return promise;
}
|
