internal Thread(ThreadStart threadStart, ThreadPriority priority, SIP sip, TaskHandle task)
{
Task = task;
_threadStart = threadStart;
_priority = priority;
_sip = sip;
}
public void Acquire()
{
TaskHandle currentTask = SystemCalls.GetCurrentTask();
//Logging.Trace("Task " + currentTask + " acquiring lock " + GetHashCode());
while (_owner != null && _owner != currentTask)
{
//Logging.Trace("Task " + currentTask + " failed to acquire lock " + GetHashCode());
_waitingOwners.Push(currentTask);
SystemCalls.BlockTask(currentTask);
SystemCalls.Yield();
}
_owner = currentTask;
//Logging.Trace("Task " + currentTask + " acquired lock " + GetHashCode());
}
public bool TryAcquire()
{
TaskHandle currentTask = SystemCalls.GetCurrentTask();
if (_owner == null)
{
_owner = currentTask;
return true;
}
else if (_owner == currentTask)
{
return true;
}
return false;
}
public void Release()
{
TaskHandle currentTask = SystemCalls.GetCurrentTask();
if (_owner == currentTask)
{
_owner = null;
if (_waitingOwners.Length > 0)
{
// here we call ScheduleTask instead of Unblock because we Yielded the task
SystemCalls.ScheduleTask(_owner = _waitingOwners.Shift());
}
}
else
{
throw new Exception("Cannot release lock. Current thread is not owner");
}
}
public extern Thread this[TaskHandle task]
{
[XaeiOSMethodImpl(MethodImplOptions.Inline, Implementation = "{this}[{0}]")]
get;
[XaeiOSMethodImpl(MethodImplOptions.Inline, Implementation = "{this}[{0}] = {1}")]
set;
}
public static extern void InjectException(TaskHandle task, Exception exception);
private void InternalCallback(TaskHandle task, string taskName, var returnValue, TaskExitStatus exitStatus)
{
//Logging.Trace("Thread internal callback: " + this + ":" + this.Name);
_running = false;
//Logging.Trace("Unregistering thread: " + this + ":" + this.Name);
ThreadManager.UnregisterThread(this);
if (exitStatus == TaskExitStatus.UnhandledException)
{
_unhandledException = returnValue.Cast<Object>() as Exception;
}
else if (exitStatus == TaskExitStatus.CriticalError)
{
_unhandledException = new ExecutionEngineException(returnValue.NativeToString());
}
if (Callback != null)
{
// TODO: Use the SIP thread pool to run this callback
Callback();
}
else
{
if (_unhandledException != null)
{
Console.WriteLine("An unhandled exception occurred in thread: " + this + ": " + _unhandledException + "\n" + _unhandledException.StackTrace);
}
}
}
internal static Thread CreateSystemThread(ThreadPriority priority, SIP sip, TaskHandle kernelTask, string name)
{
Thread kernelThread = new Thread();
kernelThread.Task = kernelTask;
kernelThread._priority = priority;
kernelThread._sip = sip;
kernelThread._name = name;
return kernelThread;
}
public static void InjectException(TaskHandle task, Exception exception)
{
GetTask(task).InjectedException = (XaeiOSException)exception;
}
public static extern void ScheduleTask(TaskHandle task);
public Lock()
{
_owner = null;
_waitingOwners = new NativeArray<TaskHandle>();
}
public static void StartTask(TaskHandle task)
{
Scheduler.StartTask(GetTask(task));
}
public static void ScheduleTask(TaskHandle task)
{
Scheduler.ScheduleTaskChecked(GetTask(task));
}
public static void KillTask(TaskHandle task)
{
Scheduler.KillTask(GetTask(task));
}
public MonitorLock()
{
_owner = null;
_waitingOwners = new NativeArray<TaskHandle>();
_count = 0;
}
public bool TryAcquire()
{
TaskHandle currentTask = SystemCalls.GetCurrentTask();
if (_owner == null)
{
_owner = currentTask;
_count++;
//Logging.Trace("Task " + currentTask + " acquired monitor lock " + GetHashCode() + " - count: " + _count);
return true;
}
else if (_owner == currentTask)
{
_count++;
//Logging.Trace("Task " + currentTask + " acquired monitor lock " + GetHashCode() + " - count: " + _count);
return true;
}
return false;
}
public static extern void StartTask(TaskHandle task);
public extern void Remove(TaskHandle task);
public WaitingTask(TaskHandle task, int resources)
{
Task = task;
Resources = resources;
}
public static extern void BlockTask(TaskHandle task);
private static Task GetTask(TaskHandle task)
{
Task t = Task.GetTaskById(var.Cast<TaskHandle, int>(task));
if (t == null)
{
throw new Exception("Task with " + task + " does not exist.");
}
return t;
}
public static extern void KillTask(TaskHandle task);
public static void BlockTask(TaskHandle task)
{
Scheduler.BlockTask(GetTask(task));
}
public void Cancel()
{
Logging.Trace("Unblocker::Cancel()");
Global.ClearTimeout(TimeoutId);
TimeoutId = null;
Task = null;
}
