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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { core } from "./core";
import * as flatbuffers from "./flatbuffers";
import * as msg from "gen/cli/msg_generated";
import * as errors from "./errors";
import * as util from "./util";
import {
recordFromBufMinimal,
handleAsyncMsgFromRustMinimal
} from "./dispatch_minimal";
const promiseTable = new Map<number, util.Resolvable<msg.Base>>();
function flatbufferRecordFromBuf(buf: Uint8Array): msg.Base {
const bb = new flatbuffers.ByteBuffer(buf);
const base = msg.Base.getRootAsBase(bb);
return base;
}
export function handleAsyncMsgFromRust(
promiseId: number,
ui8: Uint8Array
): void {
const buf32 = new Int32Array(ui8.buffer, ui8.byteOffset, ui8.byteLength / 4);
const recordMin = recordFromBufMinimal(buf32);
if (recordMin) {
// Fast and new
handleAsyncMsgFromRustMinimal(promiseId, ui8, recordMin);
} else {
// Legacy
let base = flatbufferRecordFromBuf(ui8);
const promise = promiseTable.get(promiseId);
util.assert(promise != null, `Expecting promise in table. ${promiseId}`);
promiseTable.delete(promiseId);
const err = errors.maybeError(base);
if (err != null) {
promise!.reject(err);
} else {
promise!.resolve(base);
}
}
}
function ui8FromArrayBufferView(abv: ArrayBufferView): Uint8Array {
return new Uint8Array(abv.buffer, abv.byteOffset, abv.byteLength);
}
function sendInternal(
builder: flatbuffers.Builder,
innerType: msg.Any,
inner: flatbuffers.Offset,
zeroCopy: undefined | ArrayBufferView,
isSync: true
): Uint8Array | null;
function sendInternal(
builder: flatbuffers.Builder,
innerType: msg.Any,
inner: flatbuffers.Offset,
zeroCopy: undefined | ArrayBufferView,
isSync: false
): Promise<msg.Base>;
function sendInternal(
builder: flatbuffers.Builder,
innerType: msg.Any,
inner: flatbuffers.Offset,
zeroCopy: undefined | ArrayBufferView,
isSync: boolean
): Promise<msg.Base> | Uint8Array | null {
msg.Base.startBase(builder);
msg.Base.addSync(builder, isSync);
msg.Base.addInner(builder, inner);
msg.Base.addInnerType(builder, innerType);
builder.finish(msg.Base.endBase(builder));
const control = builder.asUint8Array();
const response = core.dispatch(
control,
zeroCopy ? ui8FromArrayBufferView(zeroCopy) : undefined
);
builder.inUse = false;
if (typeof response === "number") {
const promise = util.createResolvable<msg.Base>();
promiseTable.set(response, promise);
util.assert(!isSync);
return promise;
} else {
if (!isSync) {
util.assert(response !== null);
const base = flatbufferRecordFromBuf(response as Uint8Array);
const err = errors.maybeError(base);
if (err != null) {
return Promise.reject(err);
} else {
return Promise.resolve(base);
}
}
return response;
}
}
// @internal
export function sendAsync(
builder: flatbuffers.Builder,
innerType: msg.Any,
inner: flatbuffers.Offset,
data?: ArrayBufferView
): Promise<msg.Base> {
const promise = sendInternal(builder, innerType, inner, data, false);
return promise;
}
// @internal
export function sendSync(
builder: flatbuffers.Builder,
innerType: msg.Any,
inner: flatbuffers.Offset,
data?: ArrayBufferView
): null | msg.Base {
const response = sendInternal(builder, innerType, inner, data, true);
if (response == null || response.length === 0) {
return null;
} else {
const bb = new flatbuffers.ByteBuffer(response!);
const baseRes = msg.Base.getRootAsBase(bb);
errors.maybeThrowError(baseRes);
return baseRes;
}
}
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