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71 lines
2.2 KiB
C#
71 lines
2.2 KiB
C#
// <copyright file="BaseObject.cs" company="Google Inc.">
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// Copyright (C) 2017 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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namespace Google.Impl {
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using System;
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using System.Runtime.InteropServices;
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using System.Text;
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using UnityEngine;
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/// <summary>
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/// Base object manages the pointer to a native object which provides the
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/// implementation of a C# object.
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/// </summary>
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internal abstract class BaseObject : IDisposable {
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// handle to native object.
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private HandleRef selfHandleRef;
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private static HandleRef nullSelf = new HandleRef();
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public BaseObject(IntPtr intPtr) {
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selfHandleRef = new HandleRef(this, intPtr);
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}
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protected HandleRef SelfPtr() {
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if (selfHandleRef.Equals(nullSelf)) {
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throw new InvalidOperationException(
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"Attempted to use object after it was cleaned up");
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}
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return selfHandleRef;
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}
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public virtual void Dispose() {
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selfHandleRef = nullSelf;
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}
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internal delegate UIntPtr OutStringMethod([In, Out] byte[] out_bytes,
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UIntPtr out_size);
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internal static String OutParamsToString(OutStringMethod outStringMethod) {
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UIntPtr requiredSize = outStringMethod(null, UIntPtr.Zero);
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if (requiredSize.Equals(UIntPtr.Zero)) {
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return null;
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}
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string str = null;
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try {
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byte[] array = new byte[requiredSize.ToUInt32()];
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outStringMethod(array, requiredSize);
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str = Encoding.UTF8.GetString(array, 0,
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(int)requiredSize.ToUInt32() - 1);
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} catch (Exception e) {
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Debug.LogError("Exception creating string from char array: " + e);
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str = string.Empty;
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}
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return str;
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}
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}
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}
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