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denoland-deno/cli/js/runtime.ts
Bartek Iwańczuk 79adc7b000
core: add Deno.core.dispatchByName (#6395)
This commit adds alternate dispatch method to core JS API.

"Deno.core.dispatchByName()" works like "Deno.core.dispatch()", 
but takes op name instead of op id as a first argument.
2020-06-21 16:34:43 +02:00

43 lines
1.5 KiB
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { core } from "./core.ts";
import * as dispatchMinimal from "./ops/dispatch_minimal.ts";
import * as dispatchJson from "./ops/dispatch_json.ts";
import * as util from "./util.ts";
import { setBuildInfo } from "./build.ts";
import { setVersions } from "./version.ts";
import { setPrepareStackTrace } from "./error_stack.ts";
import { Start, opStart } from "./ops/runtime.ts";
import { handleTimerMacrotask } from "./web/timers.ts";
function getAsyncHandler(opName: string): (msg: Uint8Array) => void {
switch (opName) {
case "op_write":
case "op_read":
return dispatchMinimal.asyncMsgFromRust;
default:
return dispatchJson.asyncMsgFromRust;
}
}
// TODO(bartlomieju): temporary solution, must be fixed when moving
// dispatches to separate crates
export function initOps(): void {
const opsMap = core.ops();
for (const [name, opId] of Object.entries(opsMap)) {
core.setAsyncHandler(opId, getAsyncHandler(name));
}
core.setMacrotaskCallback(handleTimerMacrotask);
}
export function start(source?: string): Start {
initOps();
// First we send an empty `Start` message to let the privileged side know we
// are ready. The response should be a `StartRes` message containing the CLI
// args and other info.
const s = opStart();
setVersions(s.denoVersion, s.v8Version, s.tsVersion);
setBuildInfo(s.target);
util.setLogDebug(s.debugFlag, source);
setPrepareStackTrace(Error);
return s;
}