48 lines
1.7 KiB
C#
48 lines
1.7 KiB
C#
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namespace ARMeilleure.Common
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{
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/// <summary>
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/// Represents an 8-bit counter.
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/// </summary>
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class Counter
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{
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private readonly int _index;
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private readonly EntryTable<byte> _countTable;
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/// <summary>
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/// Initializes a new instance of the <see cref="Counter"/> class from the specified
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/// <see cref="EntryTable{byte}"/> instance and index.
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/// </summary>
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/// <param name="countTable"><see cref="EntryTable{byte}"/> instance</param>
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/// <param name="index">Index in the <see cref="EntryTable{TEntry}"/></param>
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private Counter(EntryTable<byte> countTable, int index)
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{
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_countTable = countTable;
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_index = index;
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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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public ref byte Value => ref _countTable.GetValue(_index);
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/// <summary>
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/// Tries to create a <see cref="Counter"/> instance from the specified <see cref="EntryTable{byte}"/> instance.
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/// </summary>
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/// <param name="countTable"><see cref="EntryTable{TEntry}"/> from which to create the <see cref="Counter"/></param>
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/// <param name="counter"><see cref="Counter"/> instance if success; otherwise <see langword="null"/></param>
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/// <returns><see langword="true"/> if success; otherwise <see langword="false"/></returns>
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public static bool TryCreate(EntryTable<byte> countTable, out Counter counter)
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{
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if (countTable.TryAllocate(out int index))
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{
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counter = new Counter(countTable, index);
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return true;
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}
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counter = null;
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return false;
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}
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}
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}
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