mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-09-11 18:28:50 +02:00
100 lines
3.7 KiB
C#
100 lines
3.7 KiB
C#
|
using System;
|
|||
|
|
|||
|
namespace ARMeilleure.Common
|
|||
|
{
|
|||
|
/// <summary>
|
|||
|
/// Represents a numeric counter which can be used for instrumentation of compiled code.
|
|||
|
/// </summary>
|
|||
|
/// <typeparam name="T">Type of the counter</typeparam>
|
|||
|
class Counter<T> : IDisposable where T : unmanaged
|
|||
|
{
|
|||
|
private bool _disposed;
|
|||
|
private readonly int _index;
|
|||
|
private readonly EntryTable<T> _countTable;
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Initializes a new instance of the <see cref="Counter{T}"/> class from the specified
|
|||
|
/// <see cref="EntryTable{T}"/> instance and index.
|
|||
|
/// </summary>
|
|||
|
/// <param name="countTable"><see cref="EntryTable{T}"/> instance</param>
|
|||
|
/// <param name="index">Index in the <see cref="EntryTable{T}"/></param>
|
|||
|
/// <exception cref="ArgumentNullException"><paramref name="countTable"/> is <see langword="null"/></exception>
|
|||
|
/// <exception cref="ArgumentException"><typeparamref name="T"/> is unsupported</exception>
|
|||
|
public Counter(EntryTable<T> countTable)
|
|||
|
{
|
|||
|
if (typeof(T) != typeof(byte) && typeof(T) != typeof(sbyte) &&
|
|||
|
typeof(T) != typeof(short) && typeof(T) != typeof(ushort) &&
|
|||
|
typeof(T) != typeof(int) && typeof(T) != typeof(uint) &&
|
|||
|
typeof(T) != typeof(long) && typeof(T) != typeof(ulong) &&
|
|||
|
typeof(T) != typeof(nint) && typeof(T) != typeof(nuint) &&
|
|||
|
typeof(T) != typeof(float) && typeof(T) != typeof(double))
|
|||
|
{
|
|||
|
throw new ArgumentException("Counter does not support the specified type.");
|
|||
|
}
|
|||
|
|
|||
|
_countTable = countTable ?? throw new ArgumentNullException(nameof(countTable));
|
|||
|
_index = countTable.Allocate();
|
|||
|
}
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Gets a reference to the value of the counter.
|
|||
|
/// </summary>
|
|||
|
/// <exception cref="ObjectDisposedException"><see cref="Counter{T}"/> instance was disposed</exception>
|
|||
|
/// <remarks>
|
|||
|
/// This can refer to freed memory if the owning <see cref="EntryTable{TEntry}"/> is disposed.
|
|||
|
/// </remarks>
|
|||
|
public ref T Value
|
|||
|
{
|
|||
|
get
|
|||
|
{
|
|||
|
if (_disposed)
|
|||
|
{
|
|||
|
throw new ObjectDisposedException(null);
|
|||
|
}
|
|||
|
|
|||
|
return ref _countTable.GetValue(_index);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Releases all resources used by the <see cref="Counter{T}"/> instance.
|
|||
|
/// </summary>
|
|||
|
public void Dispose()
|
|||
|
{
|
|||
|
Dispose(true);
|
|||
|
GC.SuppressFinalize(this);
|
|||
|
}
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Releases all unmanaged and optionally managed resources used by the <see cref="Counter{T}"/> instance.
|
|||
|
/// </summary>
|
|||
|
/// <param name="disposing"><see langword="true"/> to dispose managed resources also; otherwise just unmanaged resouces</param>
|
|||
|
protected virtual void Dispose(bool disposing)
|
|||
|
{
|
|||
|
if (!_disposed)
|
|||
|
{
|
|||
|
try
|
|||
|
{
|
|||
|
// The index into the EntryTable is essentially an unmanaged resource since we allocate and free the
|
|||
|
// resource ourselves.
|
|||
|
_countTable.Free(_index);
|
|||
|
}
|
|||
|
catch (ObjectDisposedException)
|
|||
|
{
|
|||
|
// Can happen because _countTable may be disposed before the Counter instance.
|
|||
|
}
|
|||
|
|
|||
|
_disposed = true;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/// <summary>
|
|||
|
/// Frees resources used by the <see cref="Counter{T}"/> instance.
|
|||
|
/// </summary>
|
|||
|
~Counter()
|
|||
|
{
|
|||
|
Dispose(false);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|