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async_wrap.ts
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async_wrap.ts
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// This module ports:
// - https://github.com/nodejs/node/blob/master/src/async_wrap-inl.h
// - https://github.com/nodejs/node/blob/master/src/async_wrap.cc
// - https://github.com/nodejs/node/blob/master/src/async_wrap.h
export enum constants {
kInit,
kBefore,
kAfter,
kDestroy,
kPromiseResolve,
kTotals,
kCheck,
kExecutionAsyncId,
kTriggerAsyncId,
kAsyncIdCounter,
kDefaultTriggerAsyncId,
kUsesExecutionAsyncResource,
kStackLength,
}
// Increment the internal id counter and return the value.
export function newAsyncId() {
return ++asyncIdFields[constants.kAsyncIdCounter];
}
enum UidFields {
kExecutionAsyncId,
kTriggerAsyncId,
kAsyncIdCounter,
kDefaultTriggerAsyncId,
kUidFieldsCount,
}
const asyncIdFields = new Float64Array(Object.keys(UidFields).length);
// `kAsyncIdCounter` should start at `1` because that'll be the id the execution
// context during bootstrap.
asyncIdFields[UidFields.kAsyncIdCounter] = 1;
// `kDefaultTriggerAsyncId` should be `-1`, this indicates that there is no
// specified default value and it should fallback to the executionAsyncId.
// 0 is not used as the magic value, because that indicates a missing
// context which is different from a default context.
asyncIdFields[UidFields.kDefaultTriggerAsyncId] = -1;
export { asyncIdFields };
export enum providerType {
NONE,
GETADDRINFOREQWRAP,
PIPECONNECTWRAP,
PIPESERVERWRAP,
PIPEWRAP,
SHUTDOWNWRAP,
TCPCONNECTWRAP,
TCPSERVERWRAP,
TCPWRAP,
WRITEWRAP,
}
const kInvalidAsyncId = -1;
export class AsyncWrap {
provider: providerType = providerType.NONE;
asyncId = kInvalidAsyncId;
constructor(provider: providerType) {
this.provider = provider;
this.getAsyncId();
}
getAsyncId(): number {
this.asyncId = this.asyncId === kInvalidAsyncId
? newAsyncId()
: this.asyncId;
return this.asyncId;
}
getProviderType() {
return this.provider;
}
}