fb1d9493a3
* Rename enum fields
* Naming conventions
* Remove unneeded ".this"
* Remove unneeded semicolons
* Remove unused Usings
* Don't use var
* Remove unneeded enum underlying types
* Explicitly label class visibility
* Remove unneeded @ prefixes
* Remove unneeded commas
* Remove unneeded if expressions
* Method doesn't use unsafe code
* Remove unneeded casts
* Initialized objects don't need an empty constructor
* Remove settings from DotSettings
* Revert "Explicitly label class visibility"
This reverts commit ad5eb5787c.
* Small changes
* Revert external enum renaming
* Changes from feedback
* Apply previous refactorings to the merged code
650 lines
20 KiB
C#
650 lines
20 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using static Ryujinx.HLE.HOS.ErrorCode;
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namespace Ryujinx.HLE.HOS.Kernel
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{
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class KAddressArbiter
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{
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private const int HasListenersMask = 0x40000000;
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private Horizon _system;
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public List<KThread> CondVarThreads;
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public List<KThread> ArbiterThreads;
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public KAddressArbiter(Horizon system)
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{
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_system = system;
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CondVarThreads = new List<KThread>();
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ArbiterThreads = new List<KThread>();
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}
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public long ArbitrateLock(int ownerHandle, long mutexAddress, int requesterHandle)
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{
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KThread currentThread = _system.Scheduler.GetCurrentThread();
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_system.CriticalSection.Enter();
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currentThread.SignaledObj = null;
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currentThread.ObjSyncResult = 0;
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KProcess currentProcess = _system.Scheduler.GetCurrentProcess();
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if (!KernelTransfer.UserToKernelInt32(_system, mutexAddress, out int mutexValue))
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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if (mutexValue != (ownerHandle | HasListenersMask))
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{
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_system.CriticalSection.Leave();
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return 0;
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}
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KThread mutexOwner = currentProcess.HandleTable.GetObject<KThread>(ownerHandle);
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if (mutexOwner == null)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.InvalidHandle);
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}
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currentThread.MutexAddress = mutexAddress;
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currentThread.ThreadHandleForUserMutex = requesterHandle;
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mutexOwner.AddMutexWaiter(currentThread);
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currentThread.Reschedule(ThreadSchedState.Paused);
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_system.CriticalSection.Leave();
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_system.CriticalSection.Enter();
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if (currentThread.MutexOwner != null)
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{
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currentThread.MutexOwner.RemoveMutexWaiter(currentThread);
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}
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_system.CriticalSection.Leave();
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return (uint)currentThread.ObjSyncResult;
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}
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public long ArbitrateUnlock(long mutexAddress)
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{
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_system.CriticalSection.Enter();
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KThread currentThread = _system.Scheduler.GetCurrentThread();
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(long result, KThread newOwnerThread) = MutexUnlock(currentThread, mutexAddress);
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if (result != 0 && newOwnerThread != null)
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{
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newOwnerThread.SignaledObj = null;
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newOwnerThread.ObjSyncResult = (int)result;
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}
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_system.CriticalSection.Leave();
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return result;
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}
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public long WaitProcessWideKeyAtomic(
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long mutexAddress,
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long condVarAddress,
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int threadHandle,
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long timeout)
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{
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_system.CriticalSection.Enter();
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KThread currentThread = _system.Scheduler.GetCurrentThread();
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currentThread.SignaledObj = null;
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currentThread.ObjSyncResult = (int)MakeError(ErrorModule.Kernel, KernelErr.Timeout);
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if (currentThread.ShallBeTerminated ||
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currentThread.SchedFlags == ThreadSchedState.TerminationPending)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.ThreadTerminating);
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}
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(long result, _) = MutexUnlock(currentThread, mutexAddress);
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if (result != 0)
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{
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_system.CriticalSection.Leave();
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return result;
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}
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currentThread.MutexAddress = mutexAddress;
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currentThread.ThreadHandleForUserMutex = threadHandle;
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currentThread.CondVarAddress = condVarAddress;
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CondVarThreads.Add(currentThread);
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if (timeout != 0)
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{
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currentThread.Reschedule(ThreadSchedState.Paused);
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if (timeout > 0)
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{
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_system.TimeManager.ScheduleFutureInvocation(currentThread, timeout);
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}
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}
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_system.CriticalSection.Leave();
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if (timeout > 0)
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{
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_system.TimeManager.UnscheduleFutureInvocation(currentThread);
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}
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_system.CriticalSection.Enter();
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if (currentThread.MutexOwner != null)
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{
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currentThread.MutexOwner.RemoveMutexWaiter(currentThread);
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}
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CondVarThreads.Remove(currentThread);
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_system.CriticalSection.Leave();
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return (uint)currentThread.ObjSyncResult;
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}
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private (long, KThread) MutexUnlock(KThread currentThread, long mutexAddress)
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{
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KThread newOwnerThread = currentThread.RelinquishMutex(mutexAddress, out int count);
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int mutexValue = 0;
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if (newOwnerThread != null)
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{
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mutexValue = newOwnerThread.ThreadHandleForUserMutex;
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if (count >= 2)
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{
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mutexValue |= HasListenersMask;
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}
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newOwnerThread.SignaledObj = null;
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newOwnerThread.ObjSyncResult = 0;
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newOwnerThread.ReleaseAndResume();
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}
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long result = 0;
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if (!KernelTransfer.KernelToUserInt32(_system, mutexAddress, mutexValue))
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{
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result = MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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return (result, newOwnerThread);
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}
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public void SignalProcessWideKey(long address, int count)
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{
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Queue<KThread> signaledThreads = new Queue<KThread>();
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_system.CriticalSection.Enter();
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IOrderedEnumerable<KThread> sortedThreads = CondVarThreads.OrderBy(x => x.DynamicPriority);
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foreach (KThread thread in sortedThreads.Where(x => x.CondVarAddress == address))
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{
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TryAcquireMutex(thread);
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signaledThreads.Enqueue(thread);
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//If the count is <= 0, we should signal all threads waiting.
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if (count >= 1 && --count == 0)
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{
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break;
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}
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}
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while (signaledThreads.TryDequeue(out KThread thread))
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{
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CondVarThreads.Remove(thread);
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}
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_system.CriticalSection.Leave();
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}
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private KThread TryAcquireMutex(KThread requester)
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{
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long address = requester.MutexAddress;
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KProcess currentProcess = _system.Scheduler.GetCurrentProcess();
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currentProcess.CpuMemory.SetExclusive(0, address);
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if (!KernelTransfer.UserToKernelInt32(_system, address, out int mutexValue))
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{
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//Invalid address.
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currentProcess.CpuMemory.ClearExclusive(0);
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requester.SignaledObj = null;
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requester.ObjSyncResult = (int)MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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return null;
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}
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while (true)
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{
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if (currentProcess.CpuMemory.TestExclusive(0, address))
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{
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if (mutexValue != 0)
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{
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//Update value to indicate there is a mutex waiter now.
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currentProcess.CpuMemory.WriteInt32(address, mutexValue | HasListenersMask);
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}
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else
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{
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//No thread owning the mutex, assign to requesting thread.
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currentProcess.CpuMemory.WriteInt32(address, requester.ThreadHandleForUserMutex);
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}
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currentProcess.CpuMemory.ClearExclusiveForStore(0);
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break;
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}
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currentProcess.CpuMemory.SetExclusive(0, address);
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mutexValue = currentProcess.CpuMemory.ReadInt32(address);
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}
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if (mutexValue == 0)
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{
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//We now own the mutex.
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requester.SignaledObj = null;
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requester.ObjSyncResult = 0;
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requester.ReleaseAndResume();
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return null;
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}
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mutexValue &= ~HasListenersMask;
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KThread mutexOwner = currentProcess.HandleTable.GetObject<KThread>(mutexValue);
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if (mutexOwner != null)
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{
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//Mutex already belongs to another thread, wait for it.
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mutexOwner.AddMutexWaiter(requester);
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}
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else
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{
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//Invalid mutex owner.
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requester.SignaledObj = null;
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requester.ObjSyncResult = (int)MakeError(ErrorModule.Kernel, KernelErr.InvalidHandle);
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requester.ReleaseAndResume();
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}
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return mutexOwner;
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}
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public long WaitForAddressIfEqual(long address, int value, long timeout)
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{
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KThread currentThread = _system.Scheduler.GetCurrentThread();
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_system.CriticalSection.Enter();
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if (currentThread.ShallBeTerminated ||
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currentThread.SchedFlags == ThreadSchedState.TerminationPending)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.ThreadTerminating);
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}
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currentThread.SignaledObj = null;
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currentThread.ObjSyncResult = (int)MakeError(ErrorModule.Kernel, KernelErr.Timeout);
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if (!KernelTransfer.UserToKernelInt32(_system, address, out int currentValue))
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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if (currentValue == value)
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{
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if (timeout == 0)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.Timeout);
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}
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currentThread.MutexAddress = address;
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currentThread.WaitingInArbitration = true;
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InsertSortedByPriority(ArbiterThreads, currentThread);
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currentThread.Reschedule(ThreadSchedState.Paused);
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if (timeout > 0)
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{
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_system.TimeManager.ScheduleFutureInvocation(currentThread, timeout);
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}
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_system.CriticalSection.Leave();
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if (timeout > 0)
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{
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_system.TimeManager.UnscheduleFutureInvocation(currentThread);
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}
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_system.CriticalSection.Enter();
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if (currentThread.WaitingInArbitration)
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{
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ArbiterThreads.Remove(currentThread);
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currentThread.WaitingInArbitration = false;
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}
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_system.CriticalSection.Leave();
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return currentThread.ObjSyncResult;
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}
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.InvalidState);
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}
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public long WaitForAddressIfLessThan(long address, int value, bool shouldDecrement, long timeout)
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{
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KThread currentThread = _system.Scheduler.GetCurrentThread();
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_system.CriticalSection.Enter();
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if (currentThread.ShallBeTerminated ||
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currentThread.SchedFlags == ThreadSchedState.TerminationPending)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.ThreadTerminating);
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}
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currentThread.SignaledObj = null;
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currentThread.ObjSyncResult = (int)MakeError(ErrorModule.Kernel, KernelErr.Timeout);
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KProcess currentProcess = _system.Scheduler.GetCurrentProcess();
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//If ShouldDecrement is true, do atomic decrement of the value at Address.
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currentProcess.CpuMemory.SetExclusive(0, address);
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if (!KernelTransfer.UserToKernelInt32(_system, address, out int currentValue))
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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if (shouldDecrement)
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{
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while (currentValue < value)
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{
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if (currentProcess.CpuMemory.TestExclusive(0, address))
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{
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currentProcess.CpuMemory.WriteInt32(address, currentValue - 1);
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currentProcess.CpuMemory.ClearExclusiveForStore(0);
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break;
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}
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currentProcess.CpuMemory.SetExclusive(0, address);
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currentValue = currentProcess.CpuMemory.ReadInt32(address);
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}
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}
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currentProcess.CpuMemory.ClearExclusive(0);
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if (currentValue < value)
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{
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if (timeout == 0)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.Timeout);
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}
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currentThread.MutexAddress = address;
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currentThread.WaitingInArbitration = true;
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InsertSortedByPriority(ArbiterThreads, currentThread);
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currentThread.Reschedule(ThreadSchedState.Paused);
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if (timeout > 0)
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{
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_system.TimeManager.ScheduleFutureInvocation(currentThread, timeout);
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}
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_system.CriticalSection.Leave();
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if (timeout > 0)
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{
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_system.TimeManager.UnscheduleFutureInvocation(currentThread);
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}
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_system.CriticalSection.Enter();
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if (currentThread.WaitingInArbitration)
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{
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ArbiterThreads.Remove(currentThread);
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currentThread.WaitingInArbitration = false;
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}
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_system.CriticalSection.Leave();
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return currentThread.ObjSyncResult;
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}
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.InvalidState);
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}
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private void InsertSortedByPriority(List<KThread> threads, KThread thread)
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{
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int nextIndex = -1;
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for (int index = 0; index < threads.Count; index++)
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{
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if (threads[index].DynamicPriority > thread.DynamicPriority)
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{
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nextIndex = index;
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break;
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}
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}
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if (nextIndex != -1)
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{
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threads.Insert(nextIndex, thread);
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}
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else
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{
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threads.Add(thread);
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}
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}
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public long Signal(long address, int count)
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{
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_system.CriticalSection.Enter();
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WakeArbiterThreads(address, count);
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_system.CriticalSection.Leave();
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return 0;
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}
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public long SignalAndIncrementIfEqual(long address, int value, int count)
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{
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_system.CriticalSection.Enter();
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KProcess currentProcess = _system.Scheduler.GetCurrentProcess();
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currentProcess.CpuMemory.SetExclusive(0, address);
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if (!KernelTransfer.UserToKernelInt32(_system, address, out int currentValue))
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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while (currentValue == value)
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{
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if (currentProcess.CpuMemory.TestExclusive(0, address))
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{
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currentProcess.CpuMemory.WriteInt32(address, currentValue + 1);
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currentProcess.CpuMemory.ClearExclusiveForStore(0);
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break;
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}
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currentProcess.CpuMemory.SetExclusive(0, address);
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currentValue = currentProcess.CpuMemory.ReadInt32(address);
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}
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currentProcess.CpuMemory.ClearExclusive(0);
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if (currentValue != value)
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.InvalidState);
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}
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WakeArbiterThreads(address, count);
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_system.CriticalSection.Leave();
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return 0;
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}
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public long SignalAndModifyIfEqual(long address, int value, int count)
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{
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_system.CriticalSection.Enter();
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int offset;
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//The value is decremented if the number of threads waiting is less
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//or equal to the Count of threads to be signaled, or Count is zero
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//or negative. It is incremented if there are no threads waiting.
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int waitingCount = 0;
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foreach (KThread thread in ArbiterThreads.Where(x => x.MutexAddress == address))
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{
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if (++waitingCount > count)
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{
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break;
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}
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}
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if (waitingCount > 0)
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{
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offset = waitingCount <= count || count <= 0 ? -1 : 0;
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}
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else
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{
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offset = 1;
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}
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KProcess currentProcess = _system.Scheduler.GetCurrentProcess();
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currentProcess.CpuMemory.SetExclusive(0, address);
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if (!KernelTransfer.UserToKernelInt32(_system, address, out int currentValue))
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{
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_system.CriticalSection.Leave();
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return MakeError(ErrorModule.Kernel, KernelErr.NoAccessPerm);
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}
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while (currentValue == value)
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{
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if (currentProcess.CpuMemory.TestExclusive(0, address))
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{
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currentProcess.CpuMemory.WriteInt32(address, currentValue + offset);
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currentProcess.CpuMemory.ClearExclusiveForStore(0);
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break;
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}
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currentProcess.CpuMemory.SetExclusive(0, address);
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currentValue = currentProcess.CpuMemory.ReadInt32(address);
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}
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currentProcess.CpuMemory.ClearExclusive(0);
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if (currentValue != value)
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{
|
|
_system.CriticalSection.Leave();
|
|
|
|
return MakeError(ErrorModule.Kernel, KernelErr.InvalidState);
|
|
}
|
|
|
|
WakeArbiterThreads(address, count);
|
|
|
|
_system.CriticalSection.Leave();
|
|
|
|
return 0;
|
|
}
|
|
|
|
private void WakeArbiterThreads(long address, int count)
|
|
{
|
|
Queue<KThread> signaledThreads = new Queue<KThread>();
|
|
|
|
foreach (KThread thread in ArbiterThreads.Where(x => x.MutexAddress == address))
|
|
{
|
|
signaledThreads.Enqueue(thread);
|
|
|
|
//If the count is <= 0, we should signal all threads waiting.
|
|
if (count >= 1 && --count == 0)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (signaledThreads.TryDequeue(out KThread thread))
|
|
{
|
|
thread.SignaledObj = null;
|
|
thread.ObjSyncResult = 0;
|
|
|
|
thread.ReleaseAndResume();
|
|
|
|
thread.WaitingInArbitration = false;
|
|
|
|
ArbiterThreads.Remove(thread);
|
|
}
|
|
}
|
|
}
|
|
}
|