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89791ba68d
* Add EntryTable<TEntry> * Add on translation call counting * Add Counter * Add PPTC support * Make Counter a generic & use a 32-bit counter instead * Return false on overflow * Set PPTC version * Print more information about the rejit queue * Make Counter<T> disposable * Remove Block.TailCall since it is not used anymore * Apply suggestions from code review Address gdkchan's feedback Co-authored-by: gdkchan <gab.dark.100@gmail.com> * Fix more stale docs * Remove rejit requests queue logging * Make Counter<T> finalizable Most certainly quite an odd use case. * Make EntryTable<T>.TryAllocate set entry to default * Re-trigger CI * Dispose Counters before they hit the finalizer queue * Re-trigger CI Just for good measure... * Make EntryTable<T> expandable * EntryTable is now expandable instead of being a fixed slab. * Remove EntryTable<T>.TryAllocate * Remove Counter<T>.TryCreate Address LDj3SNuD's feedback * Apply suggestions from code review Address LDj3SNuD's feedback Co-authored-by: LDj3SNuD <35856442+LDj3SNuD@users.noreply.github.com> * Remove useless return * POH approach, but the sequel * Revert "POH approach, but the sequel" This reverts commit 5f5abaa24735726ff2db367dc74f98055d4f4cba. The sequel got shelved * Add extra documentation Co-authored-by: gdkchan <gab.dark.100@gmail.com> Co-authored-by: LDj3SNuD <35856442+LDj3SNuD@users.noreply.github.com>
99 lines
3.7 KiB
C#
99 lines
3.7 KiB
C#
using System;
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namespace ARMeilleure.Common
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{
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/// <summary>
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/// Represents a numeric counter which can be used for instrumentation of compiled code.
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/// </summary>
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/// <typeparam name="T">Type of the counter</typeparam>
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class Counter<T> : IDisposable where T : unmanaged
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{
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private bool _disposed;
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private readonly int _index;
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private readonly EntryTable<T> _countTable;
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/// <summary>
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/// Initializes a new instance of the <see cref="Counter{T}"/> class from the specified
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/// <see cref="EntryTable{T}"/> instance and index.
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/// </summary>
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/// <param name="countTable"><see cref="EntryTable{T}"/> instance</param>
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/// <param name="index">Index in the <see cref="EntryTable{T}"/></param>
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/// <exception cref="ArgumentNullException"><paramref name="countTable"/> is <see langword="null"/></exception>
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/// <exception cref="ArgumentException"><typeparamref name="T"/> is unsupported</exception>
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public Counter(EntryTable<T> countTable)
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{
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if (typeof(T) != typeof(byte) && typeof(T) != typeof(sbyte) &&
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typeof(T) != typeof(short) && typeof(T) != typeof(ushort) &&
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typeof(T) != typeof(int) && typeof(T) != typeof(uint) &&
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typeof(T) != typeof(long) && typeof(T) != typeof(ulong) &&
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typeof(T) != typeof(nint) && typeof(T) != typeof(nuint) &&
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typeof(T) != typeof(float) && typeof(T) != typeof(double))
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{
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throw new ArgumentException("Counter does not support the specified type.");
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}
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_countTable = countTable ?? throw new ArgumentNullException(nameof(countTable));
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_index = countTable.Allocate();
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}
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/// <summary>
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/// Gets a reference to the value of the counter.
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/// </summary>
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/// <exception cref="ObjectDisposedException"><see cref="Counter{T}"/> instance was disposed</exception>
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/// <remarks>
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/// This can refer to freed memory if the owning <see cref="EntryTable{TEntry}"/> is disposed.
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/// </remarks>
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public ref T Value
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{
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get
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{
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if (_disposed)
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{
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throw new ObjectDisposedException(null);
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}
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return ref _countTable.GetValue(_index);
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}
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}
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/// <summary>
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/// Releases all resources used by the <see cref="Counter{T}"/> instance.
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/// </summary>
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public void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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/// <summary>
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/// Releases all unmanaged and optionally managed resources used by the <see cref="Counter{T}"/> instance.
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/// </summary>
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/// <param name="disposing"><see langword="true"/> to dispose managed resources also; otherwise just unmanaged resouces</param>
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protected virtual void Dispose(bool disposing)
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{
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if (!_disposed)
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{
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try
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{
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// The index into the EntryTable is essentially an unmanaged resource since we allocate and free the
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// resource ourselves.
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_countTable.Free(_index);
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}
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catch (ObjectDisposedException)
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{
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// Can happen because _countTable may be disposed before the Counter instance.
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}
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_disposed = true;
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}
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}
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/// <summary>
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/// Frees resources used by the <see cref="Counter{T}"/> instance.
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/// </summary>
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~Counter()
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{
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Dispose(false);
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}
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}
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}
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