1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768
// Copyright Dirk Lemstra https://github.com/dlemstra/magick-wasm.// Licensed under the Apache License, Version 2.0.import { MagickError } from "../magick-error.ts";import { Exception } from "./exception/exception.ts";
export interface INativeInstance {  dispose(): void;}
export abstract class NativeInstance implements NativeInstance {  private readonly disposeMethod: (instance: number) => void;  private instance: number;
  /** @internal */  protected constructor(    instance: number,    disposeMethod: (instance: number) => void,  ) {    this.instance = instance;    this.disposeMethod = disposeMethod;  }
  /** @internal */  get _instance(): number {    if (this.instance > 0) {      return this.instance;    }
    if (this.instance === -1) {      this._instanceNotInitialized();    }
    throw new MagickError("instance is disposed");  }  /** @internal */  set _instance(instance: number) {    this.disposeInstance(this.instance);    this.instance = instance;  }
  dispose(): void {    this.instance = this.disposeInstance(this.instance);  }
  /** @internal */  protected _setInstance(instance: number, exception: Exception): void {    exception.check(() => {      this.dispose();      this.instance = instance;    }, () => {      this.disposeInstance(instance);    });  }
  /** @internal */  protected _instanceNotInitialized(): void {    throw new MagickError("instance is not initialized");  }
  private disposeInstance(instance: number): number {    if (instance > 0) {      this.disposeMethod(instance);    }
    return 0;  }}