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ryujinx-fork/Ryujinx.Common/Memory/ArrayPtr.cs
gdkchan 4d02a2d2c0
New NVDEC and VIC implementation (#1384)
* Initial NVDEC and VIC implementation

* Update FFmpeg.AutoGen to 4.3.0

* Add nvdec dependencies for Windows

* Unify some VP9 structures

* Rename VP9 structure fields

* Improvements to Video API

* XML docs for Common.Memory

* Remove now unused or redundant overloads from MemoryAccessor

* NVDEC UV surface read/write scalar paths

* Add FIXME comments about hacky things/stuff that will need to be fixed in the future

* Cleaned up VP9 memory allocation

* Remove some debug logs

* Rename some VP9 structs

* Remove unused struct

* No need to compile Ryujinx.Graphics.Host1x with unsafe anymore

* Name AsyncWorkQueue threads to make debugging easier

* Make Vp9PictureInfo a ref struct

* LayoutConverter no longer needs the depth argument (broken by rebase)

* Pooling of VP9 buffers, plus fix a memory leak on VP9

* Really wish VS could rename projects properly...

* Address feedback

* Remove using

* Catch OperationCanceledException

* Add licensing informations

* Add THIRDPARTY.md to release too

Co-authored-by: Thog <me@thog.eu>
2020-07-12 05:07:01 +02:00

123 lines
4.1 KiB
C#

using System;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Common.Memory
{
/// <summary>
/// Represents an array of unmanaged resources.
/// </summary>
/// <typeparam name="T">Array element type</typeparam>
public unsafe struct ArrayPtr<T> : IEquatable<ArrayPtr<T>>, IArray<T> where T : unmanaged
{
private IntPtr _ptr;
/// <summary>
/// Null pointer.
/// </summary>
public static ArrayPtr<T> Null => new ArrayPtr<T>() { _ptr = IntPtr.Zero };
/// <summary>
/// True if the pointer is null, false otherwise.
/// </summary>
public bool IsNull => _ptr == IntPtr.Zero;
/// <summary>
/// Number of elements on the array.
/// </summary>
public int Length { get; }
/// <summary>
/// Gets a reference to the item at the given index.
/// </summary>
/// <remarks>
/// No bounds checks are performed, this allows negative indexing,
/// but care must be taken if the index may be out of bounds.
/// </remarks>
/// <param name="index">Index of the element</param>
/// <returns>Reference to the element at the given index</returns>
public ref T this[int index] => ref Unsafe.AsRef<T>((T*)_ptr + index);
/// <summary>
/// Creates a new array from a given reference.
/// </summary>
/// <remarks>
/// For data on the heap, proper pinning is necessary during
/// use. Failure to do so will result in memory corruption and crashes.
/// </remarks>
/// <param name="value">Reference of the first array element</param>
/// <param name="length">Number of elements on the array</param>
public ArrayPtr(ref T value, int length)
{
_ptr = (IntPtr)Unsafe.AsPointer(ref value);
Length = length;
}
/// <summary>
/// Creates a new array from a given pointer.
/// </summary>
/// <param name="ptr">Array base pointer</param>
/// <param name="length">Number of elements on the array</param>
public ArrayPtr(T* ptr, int length)
{
_ptr = (IntPtr)ptr;
Length = length;
}
/// <summary>
/// Creates a new array from a given pointer.
/// </summary>
/// <param name="ptr">Array base pointer</param>
/// <param name="length">Number of elements on the array</param>
public ArrayPtr(IntPtr ptr, int length)
{
_ptr = ptr;
Length = length;
}
/// <summary>
/// Splits the array starting at the specified position.
/// </summary>
/// <param name="start">Index where the new array should start</param>
/// <returns>New array starting at the specified position</returns>
public ArrayPtr<T> Slice(int start) => new ArrayPtr<T>(ref this[start], Length - start);
/// <summary>
/// Gets a span from the array.
/// </summary>
/// <returns>Span of the array</returns>
public Span<T> ToSpan() => Length == 0 ? Span<T>.Empty : MemoryMarshal.CreateSpan(ref this[0], Length);
/// <summary>
/// Gets the array base pointer.
/// </summary>
/// <returns>Base pointer</returns>
public T* ToPointer() => (T*)_ptr;
public override bool Equals(object obj)
{
return obj is ArrayPtr<T> other && Equals(other);
}
public bool Equals([AllowNull] ArrayPtr<T> other)
{
return _ptr == other._ptr && Length == other.Length;
}
public override int GetHashCode()
{
return HashCode.Combine(_ptr, Length);
}
public static bool operator ==(ArrayPtr<T> left, ArrayPtr<T> right)
{
return left.Equals(right);
}
public static bool operator !=(ArrayPtr<T> left, ArrayPtr<T> right)
{
return !(left == right);
}
}
}