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ryujinx-fork/Ryujinx.Graphics.GAL/PinnedSpan.cs
riperiperi 9f1cf6458c
Vulkan: Migrate buffers between memory types to improve GPU performance (#4540)
* Initial implementation of migration between memory heaps

- Missing OOM handling
- Missing `_map` data safety when remapping
  - Copy may not have completed yet (needs some kind of fence)
  - Map may be unmapped before it is done being used. (needs scoped access)
- SSBO accesses are all "writes" - maybe pass info in another way.
- Missing keeping map type when resizing buffers (should this be done?)

* Ensure migrated data is in place before flushing.

* Fix issue where old waitable would be signalled.

- There is a real issue where existing Auto<> references need to be replaced.

* Swap bound Auto<> instances when swapping buffer backing

* Fix conversion buffers

* Don't try move buffers if the host has shared memory.

* Make GPU methods return PinnedSpan with scope

* Storage Hint

* Fix stupidity

* Fix rebase

* Tweak rules

Attempt to sidestep BOTW slowdown

* Remove line

* Migrate only when command buffers flush

* Change backing swap log to debug

* Address some feedback

* Disallow backing swap when the flush lock is held by the current thread

* Make PinnedSpan from ReadOnlySpan explicitly unsafe

* Fix some small issues

- Index buffer swap fixed
- Allocate DeviceLocal buffers using a separate block list to images.

* Remove alternative flags

* Address feedback
2023-03-19 17:56:48 -03:00

53 lines
2 KiB
C#

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Graphics.GAL
{
public unsafe struct PinnedSpan<T> : IDisposable where T : unmanaged
{
private void* _ptr;
private int _size;
private Action _disposeAction;
/// <summary>
/// Creates a new PinnedSpan from an existing ReadOnlySpan. The span *must* be pinned in memory.
/// The data must be guaranteed to live until disposeAction is called.
/// </summary>
/// <param name="span">Existing span</param>
/// <param name="disposeAction">Action to call on dispose</param>
/// <remarks>
/// If a dispose action is not provided, it is safe to assume the resource will be available until the next call.
/// </remarks>
public static PinnedSpan<T> UnsafeFromSpan(ReadOnlySpan<T> span, Action disposeAction = null)
{
return new PinnedSpan<T>(Unsafe.AsPointer(ref MemoryMarshal.GetReference(span)), span.Length, disposeAction);
}
/// <summary>
/// Creates a new PinnedSpan from an existing unsafe region. The data must be guaranteed to live until disposeAction is called.
/// </summary>
/// <param name="ptr">Pointer to the region</param>
/// <param name="size">The total items of T the region contains</param>
/// <param name="disposeAction">Action to call on dispose</param>
/// <remarks>
/// If a dispose action is not provided, it is safe to assume the resource will be available until the next call.
/// </remarks>
public PinnedSpan(void* ptr, int size, Action disposeAction = null)
{
_ptr = ptr;
_size = size;
_disposeAction = disposeAction;
}
public ReadOnlySpan<T> Get()
{
return new ReadOnlySpan<T>(_ptr, _size * Unsafe.SizeOf<T>());
}
public void Dispose()
{
_disposeAction?.Invoke();
}
}
}