-
Notifications
You must be signed in to change notification settings - Fork 30.1k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
5 changed files
with
81 additions
and
58 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| /*--------------------------------------------------------------------------------------------- | ||
| * Copyright (c) Microsoft Corporation. All rights reserved. | ||
| * Licensed under the MIT License. See License.txt in the project root for license information. | ||
| *--------------------------------------------------------------------------------------------*/ | ||
| import { BugIndicatingError } from 'vs/base/common/errors'; | ||
|
|
||
| /* | ||
| * This file contains helper classes to manage control flow. | ||
| */ | ||
|
|
||
| /** | ||
| * Prevents code from being re-entrant. | ||
| */ | ||
| export class ReentrancyBarrier { | ||
| private _isOccupied = false; | ||
|
|
||
| /** | ||
| * Calls `runner` if the barrier is not occupied. | ||
| * During the call, the barrier becomes occupied. | ||
| */ | ||
| public runExclusivelyOrSkip(runner: () => void): void { | ||
| if (this._isOccupied) { | ||
| return; | ||
| } | ||
| this._isOccupied = true; | ||
| try { | ||
| runner(); | ||
| } finally { | ||
| this._isOccupied = false; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Calls `runner`. If the barrier is occupied, throws an error. | ||
| * During the call, the barrier becomes active. | ||
| */ | ||
| public runExclusivelyOrThrow(runner: () => void): void { | ||
| if (this._isOccupied) { | ||
| throw new BugIndicatingError(`ReentrancyBarrier: reentrant call detected!`); | ||
| } | ||
| this._isOccupied = true; | ||
| try { | ||
| runner(); | ||
| } finally { | ||
| this._isOccupied = false; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Indicates if some runner occupies this barrier. | ||
| */ | ||
| public get isOccupied() { | ||
| return this._isOccupied; | ||
| } | ||
|
|
||
| public makeExclusiveOrSkip<TFunction extends Function>(fn: TFunction): TFunction { | ||
| return ((...args: any[]) => { | ||
| if (this._isOccupied) { | ||
| return; | ||
| } | ||
| this._isOccupied = true; | ||
| try { | ||
| return fn(...args); | ||
| } finally { | ||
| this._isOccupied = false; | ||
| } | ||
| }) as any; | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters