Ryujinx/Ryujinx.HLE/HOS/Ipc/IpcHandleDesc.cs
jhorv 23c844b2aa
Misc performance tweaks (#4509)
* use Array.Empty() where instead of allocating new zero-length arrays

* structure for loops in a way that the JIT will elide array/Span bounds checking

* avoiding function calls in for loop condition tests

* avoid LINQ in a hot path

* conform with code style

* fix mistake in GetNextWaitingObject()

* fix GetNextWaitingObject() possibility of returning null if all list items have TimePoint == long.MaxValue

* make GetNextWaitingObject() behave FIFO behavior for multiple items with the same TimePoint
2023-03-11 17:05:48 -03:00

92 lines
No EOL
2.3 KiB
C#

using System;
using System.IO;
namespace Ryujinx.HLE.HOS.Ipc
{
class IpcHandleDesc
{
public bool HasPId { get; private set; }
public ulong PId { get; private set; }
public int[] ToCopy { get; private set; }
public int[] ToMove { get; private set; }
public IpcHandleDesc(BinaryReader reader)
{
int word = reader.ReadInt32();
HasPId = (word & 1) != 0;
ToCopy = new int[(word >> 1) & 0xf];
ToMove = new int[(word >> 5) & 0xf];
PId = HasPId ? reader.ReadUInt64() : 0;
for (int index = 0; index < ToCopy.Length; index++)
{
ToCopy[index] = reader.ReadInt32();
}
for (int index = 0; index < ToMove.Length; index++)
{
ToMove[index] = reader.ReadInt32();
}
}
public IpcHandleDesc(int[] copy, int[] move)
{
ToCopy = copy ?? throw new ArgumentNullException(nameof(copy));
ToMove = move ?? throw new ArgumentNullException(nameof(move));
}
public IpcHandleDesc(int[] copy, int[] move, ulong pId) : this(copy, move)
{
PId = pId;
HasPId = true;
}
public static IpcHandleDesc MakeCopy(params int[] handles)
{
return new IpcHandleDesc(handles, Array.Empty<int>());
}
public static IpcHandleDesc MakeMove(params int[] handles)
{
return new IpcHandleDesc(Array.Empty<int>(), handles);
}
public byte[] GetBytes()
{
using (MemoryStream ms = new MemoryStream())
{
BinaryWriter writer = new BinaryWriter(ms);
int word = HasPId ? 1 : 0;
word |= (ToCopy.Length & 0xf) << 1;
word |= (ToMove.Length & 0xf) << 5;
writer.Write(word);
if (HasPId)
{
writer.Write(PId);
}
foreach (int handle in ToCopy)
{
writer.Write(handle);
}
foreach (int handle in ToMove)
{
writer.Write(handle);
}
return ms.ToArray();
}
}
}
}