86 lines
1.9 KiB
C#
86 lines
1.9 KiB
C#
// -----------------------------------------------------------------------------
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// file="UnmanagedStack"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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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>(
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T* address,
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int capacity,
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Action<nuint> freeHandle
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) : IDisposable 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(
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T value
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)
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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(
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out T value
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)
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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(
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T value
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)
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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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