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TSR Berry 2023-04-08 01:22:00 +02:00 • committed by Mary
parent cd124bda58
commit cee7121058
3466 changed files with 55 additions and 55 deletions
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94
Ryujinx.Graphics.Nvdec.Vp9/Common/MemoryAllocator.cs
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using Ryujinx.Common.Memory;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Graphics.Nvdec.Vp9.Common
{
internal class MemoryAllocator : IDisposable
{
private const int PoolEntries = 10;
private struct PoolItem
{
public IntPtr Pointer;
public int Length;
public bool InUse;
}
private PoolItem[] _pool = new PoolItem[PoolEntries];
public ArrayPtr<T> Allocate<T>(int length) where T : unmanaged
{
int lengthInBytes = Unsafe.SizeOf<T>() * length;
IntPtr ptr = IntPtr.Zero;
for (int i = 0; i < PoolEntries; i++)
{
ref PoolItem item = ref _pool[i];
if (!item.InUse && item.Length == lengthInBytes)
{
item.InUse = true;
ptr = item.Pointer;
break;
}
}
if (ptr == IntPtr.Zero)
{
ptr = Marshal.AllocHGlobal(lengthInBytes);
for (int i = 0; i < PoolEntries; i++)
{
ref PoolItem item = ref _pool[i];
if (!item.InUse)
{
item.InUse = true;
if (item.Pointer != IntPtr.Zero)
{
Marshal.FreeHGlobal(item.Pointer);
}
item.Pointer = ptr;
item.Length = lengthInBytes;
break;
}
}
}
return new ArrayPtr<T>(ptr, length);
}
public unsafe void Free<T>(ArrayPtr<T> arr) where T : unmanaged
{
IntPtr ptr = (IntPtr)arr.ToPointer();
for (int i = 0; i < PoolEntries; i++)
{
ref PoolItem item = ref _pool[i];
if (item.Pointer == ptr)
{
item.InUse = false;
break;
}
}
}
public void Dispose()
{
for (int i = 0; i < PoolEntries; i++)
{
ref PoolItem item = ref _pool[i];
if (item.Pointer != IntPtr.Zero)
{
Marshal.FreeHGlobal(item.Pointer);
item.Pointer = IntPtr.Zero;
}
}
}
}
}