IntPtr _work; //CreateThreadpoolWork. Not used with simple callbacks.
/// <exception cref="Win32Exception"/>
/// <exception cref="InvalidOperationException">(only when completionCallback is used) This thread has a synchronization context other than WindowsFormsSynchronizationContext or null; or it is null and thread's GetApartmentState is not STA.</exception>
internal Work(object state, WorkCallback workCallback, SendOrPostCallback completionCallback, bool createWork)
{
_state = state;
_workCallback = workCallback;
if (completionCallback != null)
{
_completionCallback = completionCallback;
//we need WindowsFormsSynchronizationContext to call _completionCallback in this thread
_context = EnsureWindowsFormsSynchronizationContext_.EnsurePermanently();
//SHOULDDO: loads Forms dll. Try to avoid it. Also, test with WPF.
}
_gc = GCHandle.Alloc(this);
Debug.Assert(sizeof(GCHandle) == IntPtr.Size); //we declare API IntPtr parameters as GCHandle
if (createWork)
{
_work = CreateThreadpoolWork(_workCallbackDelegate, _gc, ref _env);
}
else
{
bool ok = TrySubmitThreadpoolCallback(_simpleCallbackDelegate, _gc, ref _env);
//Debug.Assert(ok);
if (!ok)
{
throw new Win32Exception();
}
}
}
public Task(TaskControl control, WorkCallback workproc, WaitCallback oncomplete, object state)
{
this.workproc = workproc;
this.oncomplete = oncomplete;
this.control = control;
this.state = state;
}
private void mBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
object[] parameters = (object[])e.Argument;
int currentStepNumber = (int)parameters[0];
var shapeValues = (List <object>)parameters[1];
Thread.CurrentThread.CurrentCulture = (CultureInfo)parameters[2];
Thread.CurrentThread.CurrentUICulture = (CultureInfo)parameters[3];
e.Result = WorkCallback?.Invoke(currentStepNumber, shapeValues);
}
/// <summary>
/// Breaks/Stops current work.
/// </summary>
internal void InternalBreakWork()
{
if (!WorkActive)
{
return;
}
// reset last work
WorkActive = false;
WorkSessionId = 0;
WorkCallback?.Invoke();
WorkCallback = null;
}
TaskControl AddUserTaskToQueue(WorkCallback workproc, WaitCallback oncomplete, object state)
{
TaskControl control = new TaskControl();
if (thread == null)
{
thread = new WorkingThread();
}
thread.AddTask(new Task(control, workproc, oncomplete, state));
return(control);
}
public void Start(WorkCallback work, object state)
{
lock (this)
{
if (m_thread != null)
{
throw new Exception("work is already started!");
}
m_state = state;
m_workCallback = work;
m_thread = new Thread(new ThreadStart(WorkThread));
m_thread.IsBackground = true;
m_thread.Name = "WorkThread";
m_thread.Start();
}
}
public IAsyncResult BeginInvoke(object arg, AsyncCallback asyncCallback, object state, int timeout)
{
wrapper = delegate(object argv)
{
AutoResetEvent e = new AutoResetEvent(false);
try
{
TimeoutState waitOrTimeoutState = new TimeoutState(Thread.CurrentThread, state);
ThreadPool.RegisterWaitForSingleObject(e, WaitOrTimeout, waitOrTimeoutState, timeout, true);
return(workCallback(argv));
}
finally
{
e.Set();
}
};
IAsyncResult asyncResult = wrapper.BeginInvoke(arg, asyncCallback, state);
return(asyncResult);
}
/// <summary>
/// 开始调用委托
/// </summary>
/// <param name="arg"></param>
/// <param name="asyncCallback"></param>
/// <param name="state"></param>
/// <param name="timeout"></param>
/// <returns></returns>
public IAsyncResult BeginInvoke(object arg, AsyncCallback asyncCallback, object state, int timeout)
{
wrapper = delegate(object argv)
{
AutoResetEvent e = new AutoResetEvent(false);
try
{
TimeoutState waitOrTimeoutState = new TimeoutState(Thread.CurrentThread, state);
ThreadPool.RegisterWaitForSingleObject(e, WaitOrTimeout, waitOrTimeoutState, timeout, true);
return workCallback(argv);
}
finally
{
e.Set();
}
};
IAsyncResult asyncResult = wrapper.BeginInvoke(arg, asyncCallback, state);
return asyncResult;
}
public void Start(WorkCallback work, object state)
{
lock (this)
{
if (m_thread != null)
throw new Exception("work is already started!");
m_state = state;
m_workCallback = work;
m_thread = new Thread(new ThreadStart(WorkThread));
m_thread.IsBackground = true;
m_thread.Name = "WorkThread";
m_thread.Start();
}
}
public Task(TaskControl control, WorkCallback workproc, WaitCallback oncomplete, object state)
{
this.workproc = workproc;
this.oncomplete = oncomplete;
this.control = control;
this.state = state;
}
/// <summary>
/// Creates a <see cref="Work"/> object that can be used when need more options than <see cref="SubmitCallback"/> has.
/// </summary>
/// <param name="state">Something to pass to the callback functions.</param>
/// <param name="workCallback">Callback function to call in a thread pool thread.</param>
/// <param name="completionCallback">Optional callback function to call in this thread after workCallback.</param>
/// <remarks>
/// Call Dispose() to avoid memory leaks. If not called, the object and related OS object remain in memory until this process ends.
/// </remarks>
/// <exception cref="Win32Exception"/>
/// <exception cref="InvalidOperationException">(only when completionCallback is used) This thread has a synchronization context other than WindowsFormsSynchronizationContext or null; or it is null and thread's GetApartmentState is not STA.</exception>
public static Work CreateWork(object state, WorkCallback workCallback, SendOrPostCallback completionCallback = null)
{
return(new Work(state, workCallback, completionCallback, true));
}
/// <summary>
/// Requests that a thread pool thread call the callback function.
/// </summary>
/// <param name="state">Something to pass to the callback functions.</param>
/// <param name="workCallback">Callback function to call in a thread pool thread.</param>
/// <param name="completionCallback">Optional callback function to call in this thread after workCallback.</param>
/// <exception cref="Win32Exception"/>
/// <exception cref="InvalidOperationException">(only when completionCallback is used) This thread has a synchronization context other than WindowsFormsSynchronizationContext or null; or it is null and thread's GetApartmentState is not STA.</exception>
public static void SubmitCallback(object state, WorkCallback workCallback, SendOrPostCallback completionCallback = null)
{
new Work(state, workCallback, completionCallback, false);
}
TaskControl AddUserTaskToQueue( WorkCallback workproc, WaitCallback oncomplete, object state )
{
TaskControl control = new TaskControl();
if( thread == null )
thread = new WorkingThread();
thread.AddTask(new Task(control,workproc,oncomplete,state));
return control;
}
/// <summary>
/// 实例化CancellableTask
/// </summary>
/// <param name="workCallback"></param>
/// <param name="cancelCallback"></param>
public CancellableTask(WorkCallback workCallback, CancelCallback cancelCallback)
{
this.workCallback = workCallback;
this.cancelCallback = cancelCallback;
}
/// <summary>
/// 实例化CancellableTask
/// </summary>
/// <param name="workCallback"></param>
public CancellableTask(WorkCallback workCallback)
{
this.workCallback = workCallback;
}
public ThreadPool(int maxThreads,
int maxQueuedItems,
WorkCallback /* ! */ workCallback)
public static TaskControl QueueUserWorkItem( WorkCallback workproc, WaitCallback oncomplete, object state )
{
return ThreadQueue.Instance.AddUserTaskToQueue(workproc, oncomplete, state);
}
/// <summary>
/// 实例化CancellableTask
/// </summary>
/// <param name="workCallback"></param>
/// <param name="cancelCallback"></param>
public CancellableTask(WorkCallback workCallback, CancelCallback cancelCallback)
{
this.workCallback = workCallback;
this.cancelCallback = cancelCallback;
}
/// <summary>
/// 实例化CancellableTask
/// </summary>
/// <param name="workCallback"></param>
public CancellableTask(WorkCallback workCallback)
{
this.workCallback = workCallback;
}
public static TaskControl QueueUserWorkItem(WorkCallback workproc, WaitCallback oncomplete, object state)
{
return(ThreadQueue.Instance.AddUserTaskToQueue(workproc, oncomplete, state));
}
public WorkItem(WorkCallback callback, object userObject)
{
this.callback = callback;
this.userObject = userObject;
}