1 | /*! *****************************************************************************
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2 | Copyright (c) Microsoft Corporation. All rights reserved.
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3 | Licensed under the Apache License, Version 2.0 (the "License"); you may not use
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4 | this file except in compliance with the License. You may obtain a copy of the
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5 | License at http://www.apache.org/licenses/LICENSE-2.0
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6 |
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7 | THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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8 | KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
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9 | WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
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10 | MERCHANTABLITY OR NON-INFRINGEMENT.
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11 |
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12 | See the Apache Version 2.0 License for specific language governing permissions
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13 | and limitations under the License.
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14 | ***************************************************************************** */
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15 |
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16 |
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17 |
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18 | /// <reference no-default-lib="true"/>
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19 |
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20 |
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21 | interface WeakRef<T extends object> {
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22 | readonly [Symbol.toStringTag]: "WeakRef";
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23 |
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24 | /**
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25 | * Returns the WeakRef instance's target object, or undefined if the target object has been
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26 | * reclaimed.
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27 | */
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28 | deref(): T | undefined;
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29 | }
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30 |
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31 | interface WeakRefConstructor {
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32 | readonly prototype: WeakRef<any>;
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33 |
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34 | /**
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35 | * Creates a WeakRef instance for the given target object.
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36 | * @param target The target object for the WeakRef instance.
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37 | */
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38 | new<T extends object>(target: T): WeakRef<T>;
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39 | }
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40 |
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41 | declare var WeakRef: WeakRefConstructor;
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42 |
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43 | interface FinalizationRegistry<T> {
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44 | readonly [Symbol.toStringTag]: "FinalizationRegistry";
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45 |
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46 | /**
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47 | * Registers an object with the registry.
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48 | * @param target The target object to register.
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49 | * @param heldValue The value to pass to the finalizer for this object. This cannot be the
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50 | * target object.
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51 | * @param unregisterToken The token to pass to the unregister method to unregister the target
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52 | * object. If provided (and not undefined), this must be an object. If not provided, the target
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53 | * cannot be unregistered.
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54 | */
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55 | register(target: object, heldValue: T, unregisterToken?: object): void;
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56 |
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57 | /**
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58 | * Unregisters an object from the registry.
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59 | * @param unregisterToken The token that was used as the unregisterToken argument when calling
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60 | * register to register the target object.
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61 | */
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62 | unregister(unregisterToken: object): void;
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63 | }
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64 |
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65 | interface FinalizationRegistryConstructor {
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66 | readonly prototype: FinalizationRegistry<any>;
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67 |
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68 | /**
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69 | * Creates a finalization registry with an associated cleanup callback
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70 | * @param cleanupCallback The callback to call after an object in the registry has been reclaimed.
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71 | */
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72 | new<T>(cleanupCallback: (heldValue: T) => void): FinalizationRegistry<T>;
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73 | }
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74 |
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75 | declare var FinalizationRegistry: FinalizationRegistryConstructor;
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