118 lines
3.7 KiB
C#
118 lines
3.7 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="HLSFAllocationHandle.cs"
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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
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 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;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using Allocator = StgSharp.Mathematics.Memory.HybridLayerSegregatedFitAllocator;
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namespace StgSharp.Mathematics.Memory
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{
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public readonly unsafe struct hlsfHandle
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{
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internal readonly Allocator.Entry* EntryHandle;
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public readonly long AllocSize;
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internal hlsfHandle(Allocator.Entry* handle, long s)
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{
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EntryHandle = handle;
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Pointer = (byte*)handle->Position;
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AllocSize = s;
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// Console.WriteLine($"{(ulong)handle->PreviousNear}<->{(ulong)handle->NextNear},\t{handle->Size}");
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}
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public readonly ref byte this[uint index]
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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get
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{
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ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(index, AllocSize);
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return ref Pointer[index];
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}
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}
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public readonly byte* Pointer { get; init; }
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public readonly Span<byte> BufferHandle
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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get => new(Pointer, (int)AllocSize);
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}
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public readonly Enumerator GetEnumerator()
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{
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return new Enumerator(this);
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}
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public ref struct Enumerator : IEnumerator<byte>
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{
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private hlsfHandle _handle;
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private uint _index = ~0u;
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internal Enumerator(hlsfHandle span)
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{
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_handle = span;
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Span = span.BufferHandle;
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}
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public ref byte RefCurrent => ref _handle[_index];
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public Span<byte> Span { get; init; }
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public readonly void Dispose() { }
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public bool MoveNext()
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{
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_index++;
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return _index < _handle.AllocSize;
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}
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public void Reset()
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{
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_index = 0;
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}
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object IEnumerator.Current => RefCurrent;
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byte IEnumerator<byte>.Current => RefCurrent;
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}
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}
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}
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