Ryujinx/Ryujinx.HLE/HOS/Kernel/KCriticalSection.cs

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using ChocolArm64;
using System.Threading;
namespace Ryujinx.HLE.HOS.Kernel
{
class KCriticalSection
{
private Horizon _system;
public object LockObj { get; private set; }
private int _recursionCount;
public KCriticalSection(Horizon system)
{
_system = system;
LockObj = new object();
}
public void Enter()
{
Monitor.Enter(LockObj);
_recursionCount++;
}
public void Leave()
{
if (_recursionCount == 0)
{
return;
}
bool doContextSwitch = false;
if (--_recursionCount == 0)
{
if (_system.Scheduler.ThreadReselectionRequested)
{
_system.Scheduler.SelectThreads();
}
Monitor.Exit(LockObj);
if (_system.Scheduler.MultiCoreScheduling)
{
lock (_system.Scheduler.CoreContexts)
{
for (int core = 0; core < KScheduler.CpuCoresCount; core++)
{
KCoreContext coreContext = _system.Scheduler.CoreContexts[core];
if (coreContext.ContextSwitchNeeded)
{
CpuThread currentHleThread = coreContext.CurrentThread?.Context;
if (currentHleThread == null)
{
//Nothing is running, we can perform the context switch immediately.
coreContext.ContextSwitch();
}
else if (currentHleThread.IsCurrentThread())
{
//Thread running on the current core, context switch will block.
doContextSwitch = true;
}
else
{
//Thread running on another core, request a interrupt.
currentHleThread.RequestInterrupt();
}
}
}
}
}
else
{
doContextSwitch = true;
}
}
else
{
Monitor.Exit(LockObj);
}
if (doContextSwitch)
{
_system.Scheduler.ContextSwitch();
}
}
}
}