97 lines
3.0 KiB
C#
97 lines
3.0 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="UnmanagedStack"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Collections
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{
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public unsafe class UnmanagedStack<T>(T* address, int capacity, Action<nuint> freeHandle) : IDisposable
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where T: unmanaged
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{
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private T* _array = address;
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private readonly Action<nuint> _freeHandle = freeHandle;
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private readonly int _capacity = capacity;
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private int _index;
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public void Clear()
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{
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_index = 0;
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}
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public void Dispose()
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{
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if (_array != null)
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{
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_freeHandle((nuint)_array);
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_array = null;
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}
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GC.SuppressFinalize(this);
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}
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public T Pop()
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{
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if (_index == 0) {
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throw new InvalidOperationException("Stack is empty.");
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}
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return _array[--_index];
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}
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public void Push(T value)
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{
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_array[_index] = value;
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_index++;
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}
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public bool TryPop(out T value)
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{
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if (_index == 0)
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{
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value = default;
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return false;
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}
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value = _array[--_index];
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return true;
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}
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public bool TryPush(T value)
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{
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if (_index >= _capacity) {
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return false;
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}
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_array[_index] = value;
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_index++;
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return true;
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}
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}
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}
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