84 lines
2.7 KiB
C#
84 lines
2.7 KiB
C#
// -----------------------------------------------------------------------------
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// file="TimeSpanProvider"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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// -----------------------------------------------------------------------------
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using StgSharp.Timing;
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using System;
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using System.Runtime.CompilerServices;
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using System.Threading;
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namespace StgSharp.Timing
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{
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/// <summary>
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/// TimeSpanProvider: uses a bound TimeSequence and TimeSourceProviderBase to publish span
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/// ticks. Each OnSpanTick advances the sequence; when sequence ends provider unsubscribes.
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/// </summary>
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public partial class TimeSpanProvider
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{
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// private bool _subscribed;
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private readonly int _emittedSpanCount; // legacy counter
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// internal ended flag (0 = running, 1 = ended)
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private int _endedFlag;
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private readonly TimeSequence _sequence;
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private readonly TimeSourceProviderBase _timeSource;
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public TimeSpanProvider(
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TimeSequence sequence,
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TimeSourceProviderBase provider,
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int maxWaitCount = 1
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)
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{
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ArgumentNullException.ThrowIfNull(provider);
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ArgumentNullException.ThrowIfNull(sequence);
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_timeSource = provider;
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_sequence = sequence;
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_sequence.StartFrom(provider);
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provider.AddSubscriber(this);
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// _subscribed = true;
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if (!s_unusedID.TryPop(out int id))
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{
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id = Interlocked.Increment(ref s_maxID);
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}
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TokenID = id;
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_size = maxWaitCount > 0 ? maxWaitCount : 1;
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_event = new ManualResetEventSlim(initialState:false, spinCount:0);
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_pendingSpans = 0;
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}
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/// <summary>
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/// True when the provider has reached its end and will not emit further spans.
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/// </summary>
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public bool IsEnded => Volatile.Read(ref _endedFlag) != 0;
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/// <summary>
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/// Current emitted time in seconds relative to the sequence beginning.
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/// </summary>
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public double CurrentSecond => (double)(_sequence.PreviousFrameTick - _sequence.BeginningTick) / _timeSource.Frequency;
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public int CurrentSpan => _emittedSpanCount;
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public static TimeSourceProviderBase DefaultProvider => World.MainTimeProvider;
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public static int ToInt32(
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TimeSpanProvider provider
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)
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{
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return provider?._emittedSpanCount ?? 0;
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}
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public static explicit operator int(
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TimeSpanProvider provider
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)
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{
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return provider?._emittedSpanCount ?? 0;
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}
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}
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}
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