public bool CheckCallbacks(KThread thread)
{
Debug.Assert(thread != null);
if (thread.NotifiedCallbacks.Count == 0)
{
return(false);
}
Debug.Assert(_runningUserCall == false);
Debug.Assert(_runningCallback == null);
if (this.ActiveThread != thread)
{
Debug.Assert((thread.State == KThreadState.Waiting) || (thread.State == KThreadState.WaitSuspended));
_oldThread = this.ActiveThread;
this.ActiveThread = thread;
}
_oldThreadState = thread.State;
thread.State = KThreadState.Ready;
KCallback callback = thread.NotifiedCallbacks.Dequeue();
Log.WriteLine(Verbosity.Verbose, Feature.Bios, "Kernel::CheckCallbacks: issuing callback {0} on thread {1} (thread was {2})", callback.UID.ToString("X"), this.ActiveThread.UID.ToString("X"), _oldThread.UID.ToString("X"));
_runningCallback = callback;
// Format is arg1, arg2, commonAddress
// arg1 = passed during notify
// arg2 is passed during notify and given to use in argument
Cpu.MarshalCall(this.ActiveThread.ContextID, callback.Address, new uint[] { callback.NotifyCount, callback.NotifyArguments, callback.CommonAddress }, new MarshalCompleteDelegate(this.CallbackComplete), 0);
return(true);
}
public bool CheckCallbacks( KThread thread )
{
Debug.Assert( thread != null );
if( thread.NotifiedCallbacks.Count == 0 )
return false;
Debug.Assert( _runningUserCall == false );
Debug.Assert( _runningCallback == null );
if( this.ActiveThread != thread )
{
Debug.Assert( ( thread.State == KThreadState.Waiting ) || ( thread.State == KThreadState.WaitSuspended ) );
_oldThread = this.ActiveThread;
this.ActiveThread = thread;
}
_oldThreadState = thread.State;
thread.State = KThreadState.Ready;
KCallback callback = thread.NotifiedCallbacks.Dequeue();
Log.WriteLine( Verbosity.Verbose, Feature.Bios, "Kernel::CheckCallbacks: issuing callback {0} on thread {1} (thread was {2})", callback.UID.ToString( "X" ), this.ActiveThread.UID.ToString( "X" ), _oldThread.UID.ToString( "X" ) );
_runningCallback = callback;
// Format is arg1, arg2, commonAddress
// arg1 = passed during notify
// arg2 is passed during notify and given to use in argument
Cpu.MarshalCall( this.ActiveThread.ContextID, callback.Address, new uint[] { callback.NotifyCount, callback.NotifyArguments, callback.CommonAddress }, new MarshalCompleteDelegate( this.CallbackComplete ), 0 );
return true;
}
public void DeleteCallback(KCallback callback)
{
// Unset?? walk callback listings and remove?
foreach (FastLinkedList <KCallback> list in this.Callbacks)
{
list.Remove(callback);
}
// Trickier - remove from pending notification threads
foreach (KThread thread in this.Threads)
{
thread.NotifiedCallbacks.Remove(callback);
}
this.RemoveHandle(callback.UID);
}
public bool NotifyCallback(KCallback callback, uint argument)
{
Debug.Assert(callback != null);
callback.NotifyCount++;
callback.NotifyArguments = argument;
KThread thread = callback.Thread;
if (thread.NotifiedCallbacks.Find(callback) == null)
{
thread.NotifiedCallbacks.Enqueue(callback);
}
//if( ( thread.State == KThreadState.Waiting ) &&
// ( thread.CanHandleCallbacks == true ) )
//{
// this.CheckCallbacks( thread );
//}
return(true);
}
private bool CallbackComplete(int tcsId, int state, int result)
{
Debug.Assert(_oldThread != null);
Debug.Assert(_runningCallback != null);
// Something ? return value something?
if (result == 1)
{
// Delete callback
Log.WriteLine(Verbosity.Normal, Feature.Bios, "Kernel::CallbackComplete: callback {0} deleted by request", _runningCallback.UID.ToString("X"));
this.DeleteCallback(_runningCallback);
}
Log.WriteLine(Verbosity.Verbose, Feature.Bios, "Kernel::CallbackComplete: finished callback {0} on thread {1}; result was {2}", _runningCallback.UID.ToString("X"), this.ActiveThread.UID.ToString("X"), result.ToString("X"));
_runningCallback = null;
this.ActiveThread.State = _oldThreadState;
Debug.Assert(this.ActiveThread.State == _oldThreadState);
// See if there are more
if (this.CheckCallbacks(this.ActiveThread) == true)
{
return(true);
}
if (_oldThread != null)
{
this.ActiveThread = _oldThread;
_oldThread = null;
}
this.Schedule();
return(true);
}
public void DeleteCallback( KCallback callback )
{
// Unset?? walk callback listings and remove?
foreach( FastLinkedList<KCallback> list in this.Callbacks )
list.Remove( callback );
// Trickier - remove from pending notification threads
foreach( KThread thread in this.Threads )
thread.NotifiedCallbacks.Remove( callback );
this.RemoveHandle( callback.UID );
}
private bool CallbackComplete( int tcsId, int state, int result )
{
Debug.Assert( _oldThread != null );
Debug.Assert( _runningCallback != null );
// Something ? return value something?
if( result == 1 )
{
// Delete callback
Log.WriteLine( Verbosity.Normal, Feature.Bios, "Kernel::CallbackComplete: callback {0} deleted by request", _runningCallback.UID.ToString( "X" ) );
this.DeleteCallback( _runningCallback );
}
Log.WriteLine( Verbosity.Verbose, Feature.Bios, "Kernel::CallbackComplete: finished callback {0} on thread {1}; result was {2}", _runningCallback.UID.ToString( "X" ), this.ActiveThread.UID.ToString( "X" ), result.ToString( "X" ) );
_runningCallback = null;
this.ActiveThread.State = _oldThreadState;
Debug.Assert( this.ActiveThread.State == _oldThreadState );
// See if there are more
if( this.CheckCallbacks( this.ActiveThread ) == true )
return true;
if( _oldThread != null )
{
this.ActiveThread = _oldThread;
_oldThread = null;
}
this.Schedule();
return true;
}
public bool NotifyCallback( KCallback callback, uint argument )
{
Debug.Assert( callback != null );
callback.NotifyCount++;
callback.NotifyArguments = argument;
KThread thread = callback.Thread;
if( thread.NotifiedCallbacks.Find( callback ) == null )
thread.NotifiedCallbacks.Enqueue( callback );
//if( ( thread.State == KThreadState.Waiting ) &&
// ( thread.CanHandleCallbacks == true ) )
//{
// this.CheckCallbacks( thread );
//}
return true;
}