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core: add Deno.core.dispatchByName (#6395)

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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.
This commit is contained in:
Bartek Iwańczuk 2020-06-21 16:34:43 +02:00 • committed by GitHub
parent 86448fd9aa
commit 79adc7b000
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6 changed files with 27 additions and 41 deletions
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9
core/core.js
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@ -37,6 +37,7 @@ SharedQueue Binary Layout
let asyncHandlers;
let initialized = false;
let opsCache = {};
function maybeInit() {
if (!initialized) {
@ -61,7 +62,8 @@ SharedQueue Binary Layout
// op id 0 is a special value to retrieve the map of registered ops.
const opsMapBytes = send(0, new Uint8Array([]));
const opsMapJson = String.fromCharCode.apply(null, opsMapBytes);
return JSON.parse(opsMapJson);
opsCache = JSON.parse(opsMapJson);
return { ...opsCache };
}
function assert(cond) {
@ -181,9 +183,14 @@ SharedQueue Binary Layout
}
}
function dispatch(opName, control, ...zeroCopy) {
return send(opsCache[opName], control, ...zeroCopy);
}
Object.assign(window.Deno.core, {
setAsyncHandler,
dispatch: send,
dispatchByName: dispatch,
ops,
// sharedQueue is private but exposed for testing.
sharedQueue: {