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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Threading;
namespace Ryujinx.HLE.HOS.Services.Nv.NvHostCtrl
{
class NvHostSyncpt
{
public const int SyncptsCount = 192;
private int[] CounterMin;
private int[] CounterMax;
private long EventMask;
private ConcurrentDictionary<EventWaitHandle, int> Waiters;
public NvHostSyncpt()
{
CounterMin = new int[SyncptsCount];
CounterMax = new int[SyncptsCount];
Waiters = new ConcurrentDictionary<EventWaitHandle, int>();
}
public int GetMin(int Id)
{
return CounterMin[Id];
}
public int GetMax(int Id)
{
return CounterMax[Id];
}
public int Increment(int Id)
{
if (((EventMask >> Id) & 1) != 0)
{
Interlocked.Increment(ref CounterMax[Id]);
}
return IncrementMin(Id);
}
public int IncrementMin(int Id)
{
int Value = Interlocked.Increment(ref CounterMin[Id]);
WakeUpWaiters(Id, Value);
return Value;
}
public int IncrementMax(int Id)
{
return Interlocked.Increment(ref CounterMax[Id]);
}
public void AddWaiter(int Threshold, EventWaitHandle WaitEvent)
{
if (!Waiters.TryAdd(WaitEvent, Threshold))
{
throw new InvalidOperationException();
}
}
public bool RemoveWaiter(EventWaitHandle WaitEvent)
{
return Waiters.TryRemove(WaitEvent, out _);
}
private void WakeUpWaiters(int Id, int NewValue)
{
foreach (KeyValuePair<EventWaitHandle, int> KV in Waiters)
{
if (MinCompare(Id, NewValue, CounterMax[Id], KV.Value))
{
KV.Key.Set();
Waiters.TryRemove(KV.Key, out _);
}
}
}
public bool MinCompare(int Id, int Threshold)
{
return MinCompare(Id, CounterMin[Id], CounterMax[Id], Threshold);
}
private bool MinCompare(int Id, int Min, int Max, int Threshold)
{
int MinDiff = Min - Threshold;
int MaxDiff = Max - Threshold;
if (((EventMask >> Id) & 1) != 0)
{
return MinDiff >= 0;
}
else
{
return (uint)MaxDiff >= (uint)MinDiff;
}
}
}
}
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