78 lines
2.5 KiB
C#
78 lines
2.5 KiB
C#
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using System.Threading;
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namespace dotNetty_kcp.thread
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{
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public class AtomicBoolean
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{
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private int _value;
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public AtomicBoolean()
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: this(false) {
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}
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/// Creates a new <c>AtomicBoolean</c> instance with the initial value provided.
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/// </summary>
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public AtomicBoolean(bool value) {
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_value = value ? 1 : 0;
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}
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/// <summary>
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/// This method returns the current value.
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/// </summary>
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/// <returns>
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/// The <c>bool</c> value to be accessed atomically.
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/// </returns>
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public bool Get() {
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return _value != 0;
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}
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/// <summary>
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/// This method sets the current value atomically.
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/// </summary>
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/// <param name="value">
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/// The new value to set.
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/// </param>
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public void Set(bool value) {
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Interlocked.Exchange(ref _value, value ? 1 : 0);
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}
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/// <summary>
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/// This method atomically sets the value and returns the original value.
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/// </summary>
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/// <param name="value">
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/// The new value.
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/// </param>
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/// <returns>
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/// The value before setting to the new value.
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/// </returns>
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public bool GetAndSet(bool value) {
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return Interlocked.Exchange(ref _value, value ? 1 : 0) != 0;
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}
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/// <summary>
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/// Atomically sets the value to the given updated value if the current value <c>==</c> the expected value.
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/// </summary>
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/// <param name="expected">
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/// The value to compare against.
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/// </param>
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/// <param name="result">
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/// The value to set if the value is equal to the <c>expected</c> value.
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/// </param>
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/// <returns>
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/// <c>true</c> if the comparison and set was successful. A <c>false</c> indicates the comparison failed.
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/// </returns>
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public bool CompareAndSet(bool expected, bool result) {
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int e = expected ? 1 : 0;
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int r = result ? 1 : 0;
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return Interlocked.CompareExchange(ref _value, r, e) == e;
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}
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/// <summary>
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/// This operator allows an implicit cast from <c>AtomicBoolean</c> to <c>int</c>.
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/// </summary>
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public static implicit operator bool(AtomicBoolean value) {
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return value.Get();
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}
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}
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}
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